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Hi!
I encountered a strange GPS behaviour and wanted to share this with you / maybe someone has an idea bout this one:
On a businessjourney i wanted to log my way with my kaiser, and everything went fine so far. But after several hunderts of kilometres, kaiser lost more and more satellites till only 1 was left and the values were unuseable (phantasy-koordinates, speed and altitude too).
I am 100% sure that it was not a problem with our jet or any kind of shielding in it - because after a softreset it could lock again on 8 to 12 satellites. I could approve this strange loss of statellites on longer flights and car etappes (lets say 500km+) now several times.
Any idea what could be the reason?
Did the airline crew know you were using a gps device?
unwired4 said:
Did the airline crew know you were using a gps device?
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Click to collapse
Who cares, GPS device is just a receiver, they use several of them in cockpit. Even GSM mobile phone intereference is exaggerated...
Well, since it was our own jet and pilot i guess that its ok
But back to the issue: A friend of mine could acknowledge that he has the same problem when traveling over a certain distance by car.
Is it possible, that this has something to do with QuickGPS where the receiver calculates extimated postitions of the satellites (and those triangulations will be false when moving too far)? Is QuickGPS postition-dependend?
Any ideas highly appreciated...
licht77 said:
Well, since it was our own jet and pilot i guess that its ok
Click to expand...
Click to collapse
Good answer
It could be, but quickgps only provides a pre-download of the ephemeris data so that the GPS unit does not have to download it from the satellites. If it does not have the quickgps data, it could download it from the sats (thats why a normal lock takes so long), so I would guess not, unless maybe download of new data from sats is turned off if quickgps is turned on.
I see no option to specify location in quickgps but then again it could look at the handset's country code or something. Surely though it is kilobytes in size at max so downloading the whole world's data via GSM/3G would be no biggie.
On a side note, I get the same issue on my Kaiser even if I stay local sometimes. I *think* it may be getting stuck on A-GPS (Using cell phone masts to get a rough fix) - maybe try and disable A-GPS as it would be no use in a jet?
I have experienced the same thing once - and that was after using the Kaiser in a jet for only a few minutes. Once I landed, I started TomTom and was placed over 700 miles from my actual position. A soft rest cured it; I was a bit worried that the high speeds of a jet might have confused/fried my GPS, but all was fine after a soft reset.
You may see what I mean here: xxx (username and password: test): Right above Toledo / Madrid the GPS readings go crazy... :-(
Could this be the mythical 'Barcelona Triangle' ?
Interesting, you might try posting this at GPSpassion.com forum. They are the experts in GPS. It's odd that it would loose sats as the view of the sky couldn't be much better and you'd think that it would be able to keep up things, even at jet speeds the number of visible satellites wouldn't change. I would try it with GPS ON and Phone radio OFF as this might rule out any cell tower issues.
RemE said:
Interesting, you might try posting this at GPSpassion.com forum. They are the experts in GPS. It's odd that it would loose sats as the view of the sky couldn't be much better and you'd think that it would be able to keep up things, even at jet speeds the number of visible satellites wouldn't change. I would try it with GPS ON and Phone radio OFF as this might rule out any cell tower issues.
Click to expand...
Click to collapse
Hi! I tried it with GSM off - with no improvement. It seems that this is some kind of bug in the GPS-receiver?
If you have an user in that forum - feel free to post this issue!
Thx, Licht
I do experience this problem too. I was thinking it is the problem of the chip, has anyone tried the external antenna and does the problem still persist?
ZorMi said:
Who cares, GPS device is just a receiver, they use several of them in cockpit. Even GSM mobile phone intereference is exaggerated...
Click to expand...
Click to collapse
Might be exaggerated... but considering how much interference a normal GSM signal has with household electronics (and yes, commercial jetliners are heavily shielded)... it's still kind of scary.
I actually discovered I left my phone on in my bag on a Frontier Airlines flight when the GSM modem started up at around 15,000 feet and the in-seat screen in front of me started flickering and I got that cool 'ch-ch-ch-ch' noise in my headphones.
Whoops.
It's probably safe to have the GPS on, but you really should turn off the radio.. there's no telling what wiring is running next to/under your seat, and there might just be an antenna above your head that you don't know about. It's just not worth the risk (plus, if you get caught.. well.. it's a federal offense).
If you just ask, some pilots will let you turn your GPS unit on in the plane (the flight attendants will ask him/her)... Delta Airlines doesn't seem to have any problem with this, while United and American do.
I think you'll find the answer to this thread is to do with the travelling speed and height.
Dedicated flight GPS units have a much faster baud rate for data transfer and the unit itself has virtually no other background tasks to take care of.
The 'Kaiser' GPS is primarily designed as a 'walkabout' unit and can just cope with vehicle speeds. If the data shows a marked change in position (due to say travelling at a few hundred kph) then the GPS firmware believes it has an erroneous sat lock and tries to re-aquire causing the confused output.
Also, Ephemeris data is incorrect for ionospheric distortion when you are at above 25,000 thousand feet so if it tries to use QuickGPS it will actually lengthen the acquisition time.
Try it next time with both A-GPS and QuickGPS off (QuickGPS auto disables if data is out of date so just disable downloads) and note what speed/height you are when is goes crazy.
As far as i know, there is no profen evidence that one single plane was downed by a gsm signal. Additionally, i have seen Boeings where all TFT Flatscreens started heavy flickering when the intercom was running - so dont mix up important avionic board systems with unimportant, unshielded secondary systems Here in europe all commercial planes have excellent shielding standards - and there are several commerical and private planetypes around which already come up with internal gsm-repeaters and satellite connections to the gsm-groundstations (the reasons for low usage are missing business models and - i guess annoyance). And - as i said - it was our own jet and pilot, and so its me who makes the rules in there :-D
So much for offtopic.
But I really would like to know what causes this "satellite loss" and "mis-positioning" problems... - this probably makes some killerapplications impossible
Does anybody know if a-gps is geographically influenced? Anybody has further informations about how our Kaisers keep the fix on the satellites?
Farsquidge said:
I think you'll find the answer to this thread is to do with the travelling speed and height.
Dedicated flight GPS units have a much faster baud rate for data transfer and the unit itself has virtually no other background tasks to take care of.
The 'Kaiser' GPS is primarily designed as a 'walkabout' unit and can just cope with vehicle speeds. If the data shows a marked change in position (due to say travelling at a few hundred kph) then the GPS firmware believes it has an erroneous sat lock and tries to re-aquire causing the confused output.
Also, Ephemeris data is incorrect for ionospheric distortion when you are at above 25,000 thousand feet so if it tries to use QuickGPS it will actually lengthen the acquisition time.
Try it next time with both A-GPS and QuickGPS off (QuickGPS auto disables if data is out of date so just disable downloads) and note what speed/height you are when is goes crazy.
Click to expand...
Click to collapse
Thx for your informations - your ideas sound plausible! But on the flight i posted before, u can see that we were travelling about 2.5 hours at 10.000 metres and 800 km/h before everything went crazy within 60 seconds (Placemark 273 is plausible, 275 insane)... but i turned GSM off to save battery... so a-gps and quick-gps should have been off too (correct me if i am wrong)...?
licht77 said:
Thx for your informations - your ideas sound plausible! But on the flight i posted before, u can see that we were travelling about 2.5 hours at 10.000 metres and 800 km/h before everything went crazy within 60 seconds (Placemark 273 is plausible, 275 insane)... but i turned GSM off to save battery... so a-gps and quick-gps should have been off too (correct me if i am wrong)...?
Click to expand...
Click to collapse
A-GPS would be disabled but QuickGPS would still be active as it is just a downloaded info table.
It would only need loss of signal for a few seconds, say your reception was detuned by a flight manouver or you moved the location of the unit within the plane (signal strength is poor within an aircraft body without external antenna) to cause it to get confused and at speed it takes ages for a lock. You can see a big difference just starting the GPS standing still against starting it in a moving car.
Consumer GPS devices misread at high speeds and altitudes. Government regulations keep them from functioning to prohibit their use in the construction of ICBM's since most devices use a version of a generic GPS chip. Think I'm nuts? Google it.
xconradx said:
Consumer GPS devices misread at high speeds and altitudes. Government regulations keep them from functioning to prohibit their use in the construction of ICBM's since most devices use a version of a generic GPS chip. Think I'm nuts? Google it.
Click to expand...
Click to collapse
Nope, I don't think you are nuts! You are perfectly correct!
There are 3 types, consumer, commercial and military. (four if you count the US who contol the network and have the best).
Farsquidge said:
A-GPS would be disabled but QuickGPS would still be active as it is just a downloaded info table.
It would only need loss of signal for a few seconds, say your reception was detuned by a flight manouver or you moved the location of the unit within the plane (signal strength is poor within an aircraft body without external antenna) to cause it to get confused and at speed it takes ages for a lock. You can see a big difference just starting the GPS standing still against starting it in a moving car.
Click to expand...
Click to collapse
OK I guess i will give this a try as i found out how to deactivate QuickGPS
@xconradx: No youre not nuts - i can confirm that there are regulations (thats why we are gonna send up Gallileo *g*) - but i can hardly believe that this was the bugger: The readings were accurate (too accurate to prevent abuse) for 2:45min - and then the readings were just insane.
I hope we can find a workaround...
Haha, I'm glad people dont think I'm a nutjob... I've tried to explain the regulated GPS to people before and was called "paranoid, crazy", whatever....
Thats weird that it read so well for a period. I just know that basics!
My HTC Diamond is supposed to have eGPS which should facilitate quick acquisition of position. I also read that with eGPS one should get a fix indoors.
However, I'm finding that my regular Garmin navigator (an eTrex Vista HCx) gives me faster acquisition times. And works better in the home.
So is eGPS an over-hyped gimmick? Or do I have to do something to get it to work? Or must the local cellular network be upgraded to support it?
Please help.
Google maps uses it by default on my device.
The Diamond has AGPS not EGPS
Diamand has AGPS not EGPS
Alfredos said:
The Diamond has AGPS not eGPS
Click to expand...
Click to collapse
Thanks. So the Diamond has AGPS which seems to be overhyped
Maybe my next phone will have eGPS ...
aGPS
what program are you using to get a gps fix? google maps gives me a fix pretty quick but tomtom takes longer... i think it i have google maps open in the background and then open tomtom i get faster/better reception...
JanDaMan said:
google maps gives me a fix pretty quick but tomtom takes longer...
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Click to collapse
Are you sure Google Maps isn't getting its fix quicker by virtue of it using triangulation of Tx towers, and not GPS from the outset?
Mathew
A GPS from what I understand means it downloads a "database" of some sort from the web and saves it to the phone, said "database" is a kind of location guide of where the GPS satellites are, thus enabling it to get a faster fix.
By default I think it updates itself every 7 days, don't know if you can change that never bothered to look, but i update mine manually probably sooner than that - maybe every 2 days or so.
Program on the phone is "Quick GPS" incase you hadn't run it yet.
Google maps is ridiculously slow in my opinion at getting a fix especially when i compare it to TomTom 7 which I'm running on the phone and it can get me a fix from cold boot to 8 Satellites or more in under 10 seconds, every time without fail.
Windows Live Search however is still slower than TomTom 7 but is quicker at getting a fix than Google maps in my experience, problem with Google Maps and Live Search I believe is although it may seem slow at getting your location it might not be, reason being is because it has to download the piece of map it needs for where you are, the time delay I believe is in it downloading the map and processing it to screen - not actually getting your position, I think it has your position quickly enough but it can't display it because it doesn't have that part of the map yet.... catch my drift.
- maybe I'm wrong on this one but thats my opinion.
Someone on here will probably disagree with most of the above, but there you go.... It probably explains this in the Phones Manual but I'm a typical arrogant male and refuse to read manuals...unless it's a Haynes Manual for my car which I read every night before I go to bed.
Happy Days!
.G.
#6: errr... that is eGPS!
The Diamond has AGPS not EGPS
Click to expand...
Click to collapse
Sorry mate, correct me if I'm wrong, Google maps tells me my position (it's not very very accourate indeed) without using gps data (for use gps data it asks me to check a specific option). Isn't EGPS the technology that gives u the posistion using GSM antennas ?
smogdragon said:
Sorry mate, correct me if I'm wrong, Google maps tells me my position (it's not very very accourate indeed) without using gps data (for use gps data it asks me to check a specific option). Isn't EGPS the technology that gives u the posistion using GSM antennas ?
Click to expand...
Click to collapse
First Google maps is very fast to find position cause it uses GSM antennas. EGPS permit to use both GSM antennas + classic GPS. Diamond was to be eGPS but finally not. It is just A-GPS. But as mentionned before, if you want to get a fast fix with TOMTOM or iGO use Quick GPS before (take less than 10 second to download gps datas) then launch your gps soft it will fix in less than 15 seconds.
mike_sendrove said:
#6: errr... that is eGPS!
Click to expand...
Click to collapse
No, the Diamond does not support eGPS.
Google Maps uses its own system which, for all intents and purposes, works in a very similar way - namely triangulation of transmitters cross-correlated with its own database of surveyed transmitter sites.
It is worth noting that eGPS is a trademarked term (owned by CSR) covering a very specific hardware implementation of transmitter triangulation - it is not the first nor only system to do this.
Mathew
MJNewton said:
Are you sure Google Maps isn't getting its fix quicker by virtue of it using triangulation of Tx towers, and not GPS from the outset?
Mathew
Click to expand...
Click to collapse
no no i'm talking about the actual GPS fix is fast, not the approximate signal tower thing (which is instant)
When the Diamond and Touch Pro were initially unveiled they touted eGPS, why is it not included? If anyone doesn't believe me just look it up on google.
Hi there,
This topic is about my experience of configuring a-gps manually with a French operator. This may help others.
I installed a few day ago the last french official HTC ROM (see here)
My Diamond is SFR branded (French Vodafone), and after upgrading from the native SFR ROM to the HTC one, I felt a slowdown to get a good GPS signal for the apps I use: Googlemaps and iGo8. The signal also seemed less accurate.
I decided to investigate this way.
First of all, some elements that may be obvious for most of you, but reminding them does not hurt:
A-gps is a system that enhances GPS performance, by connecting to an a-gps server. As a matter of fact, this server makes use of cellular network signal to locate you faster. For further informations, see Wikipedia a-gps article.
AFAIK, a-gps is different from Quick GPS (see here) In particular, config values for a-gps and Quick GPS are located in different registry keys on Diamond.
Now let's get deeper into a-gps:
You can, once again AFAIK (and you'll correct me if I'm wrong ), use two kinds of a-gps server:
Your mobile vendor's server (i.e. HTC)
Your operator's server
I remembered that on some phones (at least Nokia N95), you have to define manually your a-gps server when using SFR network.
For Nokia, the problem is that the port used by the vendor's server is blocked by SFR WAP connection.
This is not the case of HTC a-gps server, since using HTC rom does not inhibit a-gps: it only seemed slower to me than with my SFR rom.
Here are the registry parameters for a-gps, on the original HTC ROM:
Code:
[HKEY_LOCAL_MACHINE\Software\HTC\SUPL AGPS]
"EnableAGPS"=dword:00000001
"ServerPort"=dword:00001C6B
"ServerIP"="10.1.101.63"
"QosPerformance"=dword:00000059
"QoSAccuracy"=dword:00000032
"TimeBetweenFixes"=dword:00000001
"NumberFixes"=dword:3B9AC9FF
"GPSMode"=dword:00000002
I guess "10.1.101.63" is the IP address of an HTC's a-gps server (?!)
I then downgraded to native SFR ROM, and here was the same key:
Code:
[HKEY_LOCAL_MACHINE\Software\HTC\SUPL AGPS]
"ServerURL"="geoloc2.sfr.fr"
"GPRSConnection"="WAP SFR GPRS"
"Network"="WAP SFR GPRS"
"EnableAGPS"=dword:00000001
"EnabledPrivacyMethod"=dword:00000000
"CloseConfirmMsgTime"=dword:0000003C
"PrivacyMethod"=dword:00000000
"EnableLocInfo"=dword:00000001
"ServerPort"=dword:00001C6B
"QosPerformance"=dword:00000059
"QoSAccuracy"=dword:00000032
"TimeBetweenFixes"=dword:00000001
"NumberFixes"=dword:3B9AC9FF
"GPSMode"=dword:00000002
As you see, the server is defined with its URL, "geoloc2.sfr.fr" (known as one of SFR's a-gps servers), and some parameters are different.
Of course, you have to replace "WAP SFR GPRS" by the network connection you want to use.
I upgraded to HTC ROM again, and set the operator's rom values.
Now I've got the feeling that it's harder, better, faster, stronger (and more accurate).
By the way, QuickGPS is configured in the following key: [HKEY_LOCAL_MACHINE\Software\HTC\QuickGPS].
Note that, on SFR branded rom, this key does not even exist.
Hope this helps.
I've wondered why Quick GPS seems to replace the A-GPS feature on the diamond. QuickGPS doesn't seem to do a damn thing for me. From cold boot, I can stand in open air for 5 minutes until I even start to get a peek at a couple of satellites. How can we be sure that QuickGPS is even working at all?
I used to own a Nokia N95 that had the A-GPS feature, the GPS inside the N95 was pretty average. But with the A-GPS feature you could at least get a lock in under 10 seconds, every time. As long as you had configured your positioning server, (supl.nokia.com) and you had a data connection, then it was consistently under 10 seconds from cold boot. Without A-GPS it was more like 5 minutes plus, basically what I'm seeing on the diamond.
As people have noticed, using tools like Advanced Config to enable A-GPS breaks the GPS completely. Probably because of the missing settings such as you have outlined above, (I noticed these settings while poking around in the registry recently too). I wonder how we can find out what the server names for other countries are and get this working for eveyone.
Also, the IP address 10.1.101.63 is a private IP address so I guess that explains why it fails when you switch AGPS on, that address will never be contactable, so they must have used it for some kind of internal testing - but if it's working for you (with your new settings) then why did HTC choose to leave it broken for the other ROMS....
Well... Since I updated to this last HTC rom, QuickGPS "does work". I mean, it is an installed program, therefore available in "programs" list, and when I launch it, I can "download" data to update it. Though I don't have a cue of what use is made of this technology on Diamond.
I've always used Advanced Config to enable A-GPS, and it has always worked for me. But if it breaks the GPS, I guess you can do it from the registry by setting "EnableAGPS" value to 1.
I also tested a N95 8Go recently, and I had the same results.
But I'm not sure to understand your need: Diamond has both A-GPS and QuickGPS. I don't think QuickGPS is very efficient, but A-GPS is.
I do also think that setting the "ServerIP" value to "10.1.101.63" must work worldwide, since I bet this is HTC's a-gps server.
With this, GPS signal takes about 30 seconds to lock (at first use after soft-reseting, but may be under 10 seconds for next uses).
Did you give it a try?
hantoucc said:
Well... Since I updated to this last HTC rom, QuickGPS "does work". I mean, it is an installed program, therefore available in "programs" list, and when I launch it, I can "download" data to update it. Though I don't have a cue of what use is made of this technology on Diamond.
Click to expand...
Click to collapse
Yes I have i too, and it connects and downloads data ok. But does it speed up a GPS lock? I don't think it does. I've hard reset and just run TomTom without QuickGPS and then with QuickGPS and I cannot for the life if me see any difference at all. In TomTom Satellite screen, you can see no data. If it was working, you should see all Satellite 'numbers' in their respective little boxes and then the tracking would begin almost immediately. But I'm not seeing this.
I've always used Advanced Config to enable A-GPS, and it has always worked for me. But if it breaks the GPS, I guess you can do it from the registry by setting "EnableAGPS" value to 1.
Click to expand...
Click to collapse
Many people have said that enabling A-GPS (via advanced config or direct reg edit) makes the GPS stop working completely i.e. never getting a lock. If you have got this working for you, as far as I know, you're one of the first! Lucky you!
But I'm not sure to understand your need: Diamond has both A-GPS and QuickGPS. I don't think QuickGPS is very efficient, but A-GPS is.
I do also think that setting the "ServerIP" value to "10.1.101.63" must work worldwide, since I bet this is HTC's a-gps server.
Click to expand...
Click to collapse
No that IP address is within a private non-routable range for internal private networks and cannot be reached from the internet. Read this if you want more info.
I do agree though on the A-GPS being better, and with my experience with Nokia phones A-GPS is excellent. I don't understand what it is that QuickGPS is trying to do, because there is nothing quick about it. I thought it would be similar to A-GPS (in how it actually works) but now I'm confused :/
With this, GPS signal takes about 30 seconds to lock (at first use after soft-reseting, but may be under 10 seconds for next uses).
Click to expand...
Click to collapse
Now that's the sort of time we all should expect when using an assisted/quick GPS aid to the actual GPS chip. It should be lightning fast. So to me it says QuickGPS is pretty lame, as everyone is using it by default in all ROMS and there are many many people complaining about the GPS not getting a lock at all. So it can't possibly be working properly. And if it is, it still sux.
I'm going to try and replicate those settings you have above on my Diamond and see how it goes. I'll post back shortly.
OK well I've put all those settings in, but still no luck. It is not working. I've been waiting several minutes and still cant even get a fix.
It's not out of the realms of possibility that SFR's A-GPS server can only be used by SFR customers. After all, they assign you your IP address when you connect to the web on your diamond so they could easily lock it down so that random people cannot use it. In fact that would make a lot of sense.
I think we're close, but I guess we need to find a SUPL A-GPS server that is open to the public, maybe? Or certainly at least find out if HTC has one that we can use that is accessible via the internet... Maybe someone else has some ideas?
you can try: "supl.nokia.com" instead of "geoloc2.sfr.fr"
Have you tried this, and what port does it use?
I'd been playing some more and found out having it enabled really screws things up - TomTom thinks it has a lock, then it doesn't, then it does, then it doesn't, etc. It's really bugging out. So I just switched it off.
I'm really interested to know though if A-GPS will help with the ongoing GPS-Lag/inaccuracies problem, some poeple have reported that the lag is fixed in the new OS builds floating around but I can confirm that it is not fixed - in fact it felt like it was worse!
This GPS is causing too many headaches!!!
salada2k said:
Have you tried this, and what port does it use?
I'd been playing some more and found out having it enabled really screws things up - TomTom thinks it has a lock, then it doesn't, then it does, then it doesn't, etc. It's really bugging out. So I just switched it off.
I'm really interested to know though if A-GPS will help with the ongoing GPS-Lag/inaccuracies problem, some poeple have reported that the lag is fixed in the new OS builds floating around but I can confirm that it is not fixed - in fact it felt like it was worse!
This GPS is causing too many headaches!!!
Click to expand...
Click to collapse
I'm also in Australia and i'm having the exact issues as you in regards to GPS lag and inaccuracies, i do however get a fix quite quickly, first time after a ROM change it takes a while but after that its somewhere between 30 sec and 1 min 30. I have changed my rom many times updating to all the latest custom ROM's, still its inaccuracy remains, its about 40 metres off on my device. I live inhouse number 16 and yet it tells me I'm at house 20. Like WTF........
What a pain in the arse!!!!
I got ip adress of HTC aGPS server!
its the 64.14.59.165
you got to just change the htc stock server of the diamond to this and its working well for me.
saveferris said:
I'm also in Australia and i'm having the exact issues as you in regards to GPS lag and inaccuracies, i do however get a fix quite quickly, first time after a ROM change it takes a while but after that its somewhere between 30 sec and 1 min 30. I have changed my rom many times updating to all the latest custom ROM's, still its inaccuracy remains, its about 40 metres off on my device. I live inhouse number 16 and yet it tells me I'm at house 20. Like WTF........
What a pain in the arse!!!!
Click to expand...
Click to collapse
Tell me about it. Mine is about 50m off 90% of the time, sometimes it looks like it might be ok. The other thing I noticed today is that the 'speedo' in TomTom i.e. the bit on the status bar that tells you how fast you're going - which is usually very accurate - still tells me I'm going 15km/h, then slowly counts down to zero anything up to 20 seconds after reaching a complete stop! I am starting to regret spending money on TomTom. But to quantify that, I don't blame THEM, I'm just pissed I've shelled out so much for the Diamond + TomTom and the fkng things dont work properly. We have to get to the bottom of this!
salada2k said:
Tell me about it. Mine is about 50m off 90% of the time, sometimes it looks like it might be ok. The other thing I noticed today is that the 'speedo' in TomTom i.e. the bit on the status bar that tells you how fast you're going - which is usually very accurate - still tells me I'm going 15km/h, then slowly counts down to zero anything up to 20 seconds after reaching a complete stop! I am starting to regret spending money on TomTom. But to quantify that, I don't blame THEM, I'm just pissed I've shelled out so much for the Diamond + TomTom and the fkng things dont work properly. We have to get to the bottom of this!
Click to expand...
Click to collapse
Yep, its all the same issues I'm having, but not just with tomtom, I'm using iGo8 and garmin XT with no success.
This was written by me on another thread complaining about the GPS.
I called HTC support Australia and informed them off its fault with GPS lag and its accuracy, I informed them that over 50% of users are having this issue on the XDA forum, they told me that no fault has been logged and there isn't an issue, It may be time to call up the tech support and make some noise to get this issue resolved. its a pain in the arse and it shouldn't be happening.
I also called up Hong Kong Customer support the other day and they said the exact same thing...... i think.... the chicks English was just deplorable.
I think i may call the Australian HTC support again, and just irritate the **** out of them, hopefully this time they may have a solution for me.
saveferris said:
I think i may call the Australian HTC support again, and just irritate the **** out of them, hopefully this time they may have a solution for me.
Click to expand...
Click to collapse
I hope you can get somewhere mate! Good luck!
lowrider_05 said:
its the 64.14.59.165
you got to just change the htc stock server of the diamond to this and its working well for me.
Click to expand...
Click to collapse
anyone tried if this really works?
Is IgO 8 working with A-GPS enabled?
Thanks
Update/Refresh of GPS data
Maybe a stupid question, but how can I update the a-GPS data or does the device update the data automatically?
pls delete
lit2fly said:
anyone tried if this really works?
Click to expand...
Click to collapse
Well, it does seem to be some kind of Navigation related server - I am trying now...
Well, it doesn't seem to have made a difference - but I will test some more...
lowrider - where did you find that IP?
What is the data amount when using AGPS ?
Are some data only transferred when opening TomTom ?
steph90 said:
What is the data amount when using AGPS ?
Are some data only transferred when opening TomTom ?
Click to expand...
Click to collapse
It should be only a few KB send, and then a little more KB received.
It should only happen when the GPS is activated (e.g. you start TomTom) and then the A-GPS would kick in then. It should not transfer any more data unless you lost the GPS signal, then it would assist the GPS in getting a lock again, and therefore transfer another few KB.
Now please no groaning when you see this topic. I know the GPS has been hammered to death on these forums; this post is my vein attempt to see if one particular area of interest of mine has at all moved forward.
(let's also side-step the whole "does your GPS lag?" issue here too!)
(..and, for clarify, I'm referring to AGPS as in the use of the mobile phone network to 'assist' positioning by use of triangulation in areas of poor/no GPS reception, and NOT the use of QuickGPS to download current sat. info in an attempt to get a quicker initial fix)
I used to use TomTom Navigator v7.450; it worked (of a fashion! ) although one specific thing that never worked was that whenever AGPS was enabled (using AdvancedConfig or similar) TomTom would get a signal and then immediately drop it again.. on/off on/off etc.. the fix being to disable AGPS.
I must admit I'm suspicious about HTC having their stock ROMs with AGPS disabled by default - especially as this was initially a 'selling point' of the device and part of the sales blurb ("not only does it have GPS but really good GPS using AGPS".. oh the irony!) - have they themselves ever got it to work?!?!
Now TomTom Navigator v7.910 is out (have just installed it myself, currently waiting for an updated map to download). I have seen it muted that this now works with AGPS on the Diamond or maybe the Pro (ie. someone reports the above bug, yet claims it now works having moved to v7.910). Can anyone else confirm this? More importantly, can anyone confirm AGPS has given the Diamond any GPS-related benefit what-so-ever?? (ie. great if it doesn't stop TomTom working anymore, but does it actually improve it like it should?).
I'll of course try it out myself later today or over the weekend and report back.
Hope this makes sense.. cheers.
just tried TomTom 7.910 (9185) with AGPS enabled, and cant say i noticed much difference.
seems the same now with it enable or dissabled. Cant be sure tho, havent done a long journey yet.
Will update later/tomorrow.
mugglesquop said:
just tried TomTom 7.910 (9185) with AGPS enabled, and cant say i noticed much difference.
seems the same now with it enable or disabled. Cant be sure tho, haven't done a long journey yet.
Will update later/tomorrow.
Click to expand...
Click to collapse
Thanks for taking the time etc.
Interesting, because..
I've just taken a wonder outside and found I'm still getting the signal constantly being lost bug (looking at the screen that shows the sat. bars I have a good signal for a few seconds, then this goes and 'No GPS device' is displayed, then good signal back again and so on).
On this Diamond I'm using ROM 1.93.401.2 the the supplied radio (1.0.25.05), as I suspected this 'improvement' (potentially) noticed by you/others is more likely a result of a ROM/radio update and not a TomTom software update (guessing this AGPS bug isn't the first thing you try after flashing is it?).
Hmm..
nb. I'm using the exact same version/build of TomTom as you
hmmm... yeh, i'm going on a 60+ mile journey later, so will have a play.
Using Dutty's 3.4 ROM and Radio is BS14...
I thought that the whole point of AGPS is so you could help you get a GPS fix when indoors. Which I always thought was an unusual selling point when the entire purpose of GPS software is to help you find your way in the outdoors. Perhaps it could be more useful for those new tagging services that are popping up.
Anyhow I've been running a fairly recent version of iGo8 using Dutty's Rom 3.3 and 3.4 (both with that new radio).
With AGPS turned off, GPS signal is quickly attained and holds strong outdoors. Nothing indoors, naturally.
With AGPS turned on (via Duttys "AGPS Settings" utility), GPS signal is as quickly attained and flickers fully on then fully off, repeating constantly. When indoors, nothing at all.
So, with iGo8, AGPS seems to be a non-runner.
By the way, I once read that AGPS has to be configured to your particular mobile provider. Perhaps that's the issue?
Same here, with a-gps enabled signal drops constantly
after my journey yesterday, had the same problems as above.
tried with TomTom 7 and iGo8
I've never had any problems with GPS apart from slow getting a moving fix when the unit is physically very hot.
The main benefit of AGPS for me is that you can get your location on Google Maps within 1500m or so without enabling GPS.
It also proves A-GPS works.
ben cole said:
I've never had any problems with GPS apart from slow getting a moving fix when the unit is physically very hot.
The main benefit of AGPS for me is that you can get your location on Google Maps within 1500m or so without enabling GPS.
It also proves A-GPS works.
Click to expand...
Click to collapse
Hmm, I think this is thanks to googles effort, not AGPS... Google uses Google Gears API which can position you by using basestations and SSIDs.
AGPS is correcting/updating the GPS data with actual almanac data sent from you mobile provider...
Pitchb3nd said:
Same here, with a-gps enabled signal drops constantly
Click to expand...
Click to collapse
Same for me, anyone being able to use TomTom and AGPS without losing signal periodically?
ben cole said:
I've never had any problems with GPS apart from slow getting a moving fix when the unit is physically very hot.
The main benefit of AGPS for me is that you can get your location on Google Maps within 1500m or so without enabling GPS.
It also proves A-GPS works.
Click to expand...
Click to collapse
Yeah Google Maps does this on its own without having AGPS enabled on the Diamond. I believe AGPS is supposed to be more accurate than 1000m - 1500m though.
Oh and I believe the way that Google Maps gets its position depends on your mobile provider. I used to get the message "your location is not available" constantly on my network but one day (simultaneously as the iPhone was released in my country), the location was available. So I believe that the network flicked a switch for this technology to work.
AGps and TomTom
Hi,
agps have need to run to:
1) Carrier to inform MobilePhone here is (Is a Base Station Issue)
2) Public information about position
On mobilephone if is enable i think is need to have different information, and tomtom have old pattern to process agps information.
With googlemaps have new process and can use.
With my diamond agps run (googlemaps)
Cityhunter71
Please, don't mix the Google technology and A-GPS. They have nothing in common.
Google maintains their own privately held database of GSM-cellids which GMM can query to determine your position based on the current cellid.
A-GPS is a technology where the GSM-basestation itself receives GPS-satellitedata and relays it to the device. With this additional data, the GPS-receiver in the device is supposed to achieve a faster fix.
Have fun!
a-gps works with 7.450
i remember once that it was taking forever for the satelites to be found yet is was updating my postion on the map constantly via a-gps (which im sure was enabled by default in stock rom as ive never changed it)
a-gps is useful inside because you usually have your phone with you and to find a route, you need gps
Apologies for my erroneous post.
I realised my error today when I installed Google Maps on an ageing Blackberry I had unlocked to play with.
Started it up and lo and behold there was my location....thought I'd better head back here to suffer my shame ...LOL
Thanks for the input guys.
So - in summary:
Even with later ROMS / radios / software applications, there is still yet to be seen any benefit from the Diamond (theoretically) having an A-GPS capability.
RUBBISH!!
I personally subscribe to the theory that there is a missing link between the A-GPS driver type software and an info feed from the likes of the network operator, ie. it's all very well it picking up info on the network but without a back-end database to translate this it's useless.
As far as purpose goes.. I personally think A-GPS sounds on paper to be a great idea. Not a replacement for GPS, nor to be used exclusively indoors, but a good aid/starting point. For example, if I'm sitting in an unfamiliar office in London and wanted to use TomTom to navigate me a route to where I want to get to, A-GPS could provide TomTom with a rough starting point. Similarly, I often find myself launch a nav program (when I'm lost!) and standing there for up to 5 mins waiting for a fix.. at least this would give me an approximation from which I could probably work out myself where I was from looking around me. In my mind when you first fire up TomTom on the Diamond A-GPS should simply put you in the right postcode and start doing its stuff while the GPS seeks out its signal, and not still show me as being either at Home or its last known destination. But in any event - it seems not to work!! Bugger!!
I thought that aGPS was also to help hold a GPS signal when in tunnels, canyons, heavy forest cover (ie.Redwoods in this area, many tower to well over 300 feet!) or any situation where the signal from the satellites may be impaired, or even blocked completely.
Im running Duttys 3.5 and with AGPS on I will get a signal for 10 seconds, then it goes for a second, then back for 10. then gone. Turned AGPS off and all is well.
I can confirm that AGPS does work, some parts here in Finland it works and someplaces it does that on off thingy. once when I was just playing with my tomtom it got signal where it would never get it without it. but mostly here it doesnt work properly so i disable it.
But in Helsinki (larger city) it works properly and helps getting signal fast beneath tall buildings.
But yeah it doesnt work in my hometown so its kinda rubbish here.
Maybe it has something to do with how new are nearby cell towers or something. dunno
In Trondheim, Norway it worked with Telenor and gave me a signal indoors, but when I use it together with TomTom the signal gets lost periodicly, really really annoying since "everything" is already there. Probably just something with the co-operation with the regular GPS or something?
I think i got it to run.
I use tt7.910 on diamond with htc 1.93 dutch rom
My mobile provider is mobistar.
I can get a lock inside, tough it's slow(ie not as fast as outside).
When I fire up tt7 the almanac data is showing in the satelite screen.
reg settings are:
Code:
GPRSConnection: Orange World
GpsMode: 4
Network: Orange World
ServerIP: 194.51.71.138
ServerPort: 7275
ServerUrl: agps.orange.fr
Hi, I'm a new member, but more of a lurker. I originally planned to buy a Hermes but after reading about all the hardware problems I decided to go for the Kaiser. My question is, are there any major problems with the Kaiser? I know of the ImageON driver issues, are there any other hardware or software issues?
I don't think there's any fundamental problem with the hardware. The 3 Mp camera is not great, but what do you expect of a camera on a phone?
There a lot of ROMs, official and cooked, you can choose one that suits you.
Mine works pretty well with the original WM 6.0 ROM or the HTC official 3.02 one. With more recent ROMs or radio firmware I have problems with GPS fix times and access to WiFi routers.
Thanks for the fast reply!
I'm sorry to ask this in the Kaiser forum, but would going for the Hermes be worse than the Kaiser? They're essentially the same, except that I've read of a lot of h/w problems on the Hermes.
Hermes is awful next to the Kaiser. I still have mine here, had to use it while my Kaiser was being repaired a few months ago and it was just a PITA. Slow as hell, deeply embossed and lower quality screen,... But I can't talk of hardware problems with it.
If you get a 2nd hand Kaiser, the important points you need to check is that 3G is working (early units had faulty 3G hardware that would fail after some time, but most should have been warranty-fixed by now), and that the USB port is not broken as some tend to break it by shoving the stylus in it instead of the storage place.
I guess I know which phone I'm going for thanks!
One more question! sorry lol, I know the Kaiser has A-GPS, do you have to pay for it? If I put TomTom on my Kaiser will I have to pay for using the assisted GPS?
Also, is CorePlayer working fine on the Kaiser, mainly with xvid/avi files?
A-GPS aka QuickGPS will want to download a small file off the internet at least once a week, be it through Wifi, Activesync or whatever else is available to get satellite data and allow for shorter times to first fix, that's all. And if you don't want to use it you're not forced to, it will just take a little longer to get a fix.
So nothing to pay, except if you decide to download that little file over GPRS where your data fees would apply.
Coreplayer works fine, I personally reencode my videos in 320x240 divx for viewing with it. Never really tried anything else for video.
Alright, thanks amigo!
kilrah said:
A-GPS aka QuickGPS will want to download a small file off the internet at least once a week, be it through Wifi, Activesync or whatever else is available to get satellite data and allow for shorter times to first fix, that's all. And if you don't want to use it you're not forced to, it will just take a little longer to get a fix.
Click to expand...
Click to collapse
AGPS is not the same thing as QuickGPS (though it took me ages to realise).
Quick GPS is what you describe and is generally considered to be worthwhile.
AGPS is similar, but it downloads more specific information which (I believe) is based on which phone masts you're near - and therefore should be even better for getting a good fix. The problems are A - It will cost money if you have to pay for your internet connection and B - apparently (though I've never used it) it will sometimes update the data while you're actually using GPS and as a result lose your fix while you're driving somewhere. A lot of people don't like AGPS at all.
dancj said:
AGPS is not the same thing as QuickGPS (though it took me ages to realise).
Click to expand...
Click to collapse
Well.. it is in some way. The problem is that AGPS can be implemented in different ways up to different extents...
The first thing is what is mentioned above - downloading ephemeris data from the net instead of getting it directly from the satellites, which would require continuous link with each satellite for about 1 minute. First fix time is thus shortened as the data for 1 week is stored locally. This is what QuickGPS and SeaSGEE do.
The usual "Disable AGPS" in KaiserTweak / Advanced Config is a second thing. It switches to a different position calculation algorithm that is supposed to work better in low signal conditions, by extrapolating the movement at the time signal is lost and trying to guesstimate how it could evolve everytime some signal is received. But many people don't like that as it's only giving decent results in certain conditions like driving, and when walking, geocaching etc it does nothing more than giving wrong info.
What you mention by using cell towers and an internet database is also something that can be done under the AGPS naming, but AFAIK it's not implemented on the Kaiser.
It sounds like you know more about it than I do so I'll bow to your greater knowledge