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I believe Kaiser rely on the Qualcomm chip for GPS. How is the performance. People say good thing about the SIRF III chip. How is the Kaiser GPS compare to the SIRF III? Anyone know?
welll in most cases built in gps arnt as reliable as the actuall thing... they are off sometimes
I guess it may depend on what you want/need to do with GPS.
If I turn it on and run Google Maps, it shows me right in the middle of my house, and that's where I am. If I move from one end of my house to another, I again appear in the right place.
To use GPS do we require to have gprs or 3g data activated.
Or is like integrated FM Radion which doesnt require data connection.
No -- there is a GPS receiver built into the unit that sends NMEA 0183 data over a serial port. You'll probably need map software; any software that works with WM6 and a Bluetooth GPS should do the job (e.g. TomTom 6).
I use Googlemaps and TOMTOM 6 with no problem.
I need to mention that I am a current HTC Trinity owner, and if IF if IF if IF the Kaiser has the same A-GPS chip found in the trinity, then this is what we should expect (from my experience with the Trinity)
1- Initial fix time can take long (sometimes it takes 2 minutes, sometimes 5 minutes, sometimes 10 minutes, and sometimes IT NEVER gets a fix and no GPS singal can be found)
2- Once the GPS get a fix, then it works perfectly and flawlessly.
So I only hope that the Kaiser will solve the initial fix problem.
Has it now "normal" GPS or the mobile Version AGPS
I guess you could upgrade your radio to 1.40+ and try again. They said there's a big improvement to GPS fix.
Talking about TTFF, if you are moving, or inside a building, I think it will take longer than usual to get a fix. I live in a really urban area, but once I stand still in an open area, I usually got fix in 2-3 minutes, without exception.
Someone did a test in the Trinity forum - the accuracy of the qualcomm chip is even better than that of the sirf-iii.
However, a major problem though is the lack of a software assisted gps problem that can improve the ttff time. (Though qualcomm said there's one, but until now it's still vapourware.)
ww2250 said:
I guess you could upgrade your radio to 1.40+ and try again. They said there's a big improvement to GPS fix.
Talking about TTFF, if you are moving, or inside a building, I think it will take longer than usual to get a fix. I live in a really urban area, but once I stand still in an open area, I usually got fix in 2-3 minutes, without exception.
Someone did a test in the Trinity forum - the accuracy of the qualcomm chip is even better than that of the sirf-iii.
However, a major problem though is the lack of a software assisted gps problem that can improve the ttff time. (Though qualcomm said there's one, but until now it's still vapourware.)
Click to expand...
Click to collapse
I also have the Trinity and can back up the above comments. I have a Sirf III device as well and apart from the Time To First Fix being quicker there is no noticeable difference between the two - both very accurate and don't lose their fixes.
TheEngineer0815 said:
Has it now "normal" GPS or the mobile Version AGPS
Click to expand...
Click to collapse
You might find this interesting: http://mobilitysite.com/2007/08/assisted-gps/
Gordon
GordonTGopher said:
You might find this interesting: http://mobilitysite.com/2007/08/assisted-gps/
Click to expand...
Click to collapse
Really interesting. The author of this article think that the Kaiser will have a Sirf-III. Now I think for the first time, we got a device with 2 GPS, a dedicated Sirf-III GPS chip together with a Qualcom integrated GPS.
I would imagine it will greatly increase the accuracy as well as the TTFF
Oh, wait, HTC might disable the Qualcom GPS, and just use the Sirf-III. See what they did to Hermes
Does anyone know how to start the gPS on the Kaiser - I bought one ...but don`t know how to start !
Some people might experience with certain GPS software.
If you look at the log of the NMEA log, you might realize that it burst out every 6-10 seconds. After that you might wait for another 6-10 sec, which is unusable for real-time navigation. If you happen to meet this trouble.
I have a way which could allow normal update intervals.
Install GPSGATE, it create virtual GPS COM PORT and re-route the NMEA data.
Install GPSGATE, just use the default settings, it create the virtual GPS port as COM 1.
Just use GPS software on COM 1 .
software url: http://franson.com/gpsgate/
Can anyone confirm this works? Ive noticed my GPS works the same way. Im using the Kaiser / TyTn II with Mapking and i notice that i also get my signbal ins bursts and NOT a smooth stream. Anyone know if this will resolve the problem?
What is the update intervals with GPSGATE ?
Do you mean GPSGATE must be run concurrently with the other software TomTom 6 for example ?
It would be a good workaround for people who encounter this GPS issue.
could this be some delicious spam?
How exactly does the OP propose that a user space application can make the hardware produce data in a smoother stream?
I call BS.
seems like BS to me too...Probably some spam Can anyone who has tried it out verify if it really works or not?..
THKS
You don't need to use other GPS software concurrently,
just use the GPSGATE and mapking will do.
Remember you have to modify the settings in mapking to use the virtual com port ( com1 default)
Not SPAM
I am not sure, this is BS.
If I am not mistaken the GPSGATE will act like a "router" (middle man) between the GPS hardware (Internal GPS of Kaiser) and the application (TomTom).
If the GPS hardware is faulty (having problem) with bursting data every 10 seconds, then the GPSGATE will also receive bursting data every 10 seconds.
So, that's useless as long as the problem is in the GPS hardware.
Gpsproxy should be able to do the same thing and its free.
GPSGate is a splitter, allowing using more than one application with the same NMEA stream. It creates another virtual GPS COM port, that's it.
GPS on the Kaiser works great and I'm on SatNav business. Aquisition time is fast, reception is great and update ratio is every 1 sec, just like any other civilian GPS receiver. GPS is NOT evaluated by the refresh rate you see on the screen, other software will give you other rate, try OZI Explorer for instance. I used Kaiser with TomTom, Destinator & Ozi, all works really great even comparing to Sirf III GPS chipset embedded devices such as Eten X500, HTC Artemis and Asus 535.
Last, Microsoft has included the same functionality of GPS Gate in WM5 and WM6 under settings. You do not need to install any additional SW, you can send "trueman 12345" (the guy who opened this thread with 2 posts history) your money directly.
Thanks RonenB for this very usefull precision !
Thanks as well RonenB, However, it does not solve the odd occasional pause in the data that we're seeing. Is this hardware or software that needs help in the Kaiser?
Actually I'm not so sure we have defined the problem accurately here.
Examining the signal from the GPS shows some interesting info.
1
A satellite is locked onto for perhaps only one or two seconds at a time.
2
Several satellites can achieve a lock but out of these a few will be lost every few seconds
3
New satellites are also acquired every few seconds.
The Result
If you are in the presence of many satellites then there is a constant dropping of some and locking onto others. This leads to no problems as there are always a few satellites locked on and data flow is smooth.
BUT
If you are in the presence of only say 2 or 3 satellites it is possible to drop these two or three (as indicated above), but no new ones are acquired. In this situation there will be a few seconds before the first 2 or 3 lock in again. Result a gap in data flow to your GPS software.
Meaning
The Internal GPS is not polling data in bursts. In other words you cannot turn up the frequency of data polling (possible baud rate adjustment maybe). The data is continuous but if there are too few satellites then there can be gaps where it drops some satellites and does not lock others.
There are various applications that can show this behaviour graphically but tomtom shows it well on the satellite view screen.
Compared to external GPS satellite locks this works in a strangely different way. You will see the bars jumping around from a lock on this one to that one continuously. Only a problem as I say when there are only a few satellites in sight.
Mike
PS - I cannot see the advantage of GPSGate in this particular situation as it is due to momentary periods when no satellite is detected.
Having said all of the above, I find the GPS perfectly adequate for general use. Perhaps if I need spot on plotting data then it might be weak. However if I need that unusual level of accuracy I would not use my phone to do it. I regularly use mine in place of my car's tomtom and the results are on a par with the full tomtom device.
mikechannon said:
Actually I'm not so sure we have defined the problem accurately here.
Examining the signal from the GPS shows some interesting info.
1
A satellite is locked onto for perhaps only one or two seconds at a time.
2
Several satellites can achieve a lock but out of these a few will be lost every few seconds
3
New satellites are also acquired every few seconds.
The Result
If you are in the presence of many satellites then there is a constant dropping of some and locking onto others. This leads to no problems as there are always a few satellites locked on and data flow is smooth.
BUT
If you are in the presence of only say 2 or 3 satellites it is possible to drop these two or three (as indicated above), but no new ones are acquired. In this situation there will be a few seconds before the first 2 or 3 lock in again. Result a gap in data flow to your GPS software.
Meaning
The Internal GPS is not polling data in bursts. In other words you cannot turn up the frequency of data polling (possible baud rate adjustment maybe). The data is continuous but if there are too few satellites then there can be gaps where it drops some satellites and does not lock others.
There are various applications that can show this behaviour graphically but tomtom shows it well on the satellite view screen.
Compared to external GPS satellite locks this works in a strangely different way. You will see the bars jumping around from a lock on this one to that one continuously. Only a problem as I say when there are only a few satellites in sight.
Mike
PS - I cannot see the advantage of GPSGate in this particular situation as it is due to momentary periods when no satellite is detected.
Having said all of the above, I find the GPS perfectly adequate for general use. Perhaps if I need spot on plotting data then it might be weak. However if I need that unusual level of accuracy I would not use my phone to do it. I regularly use mine in place of my car's tomtom and the results are on a par with the full tomtom device.
Click to expand...
Click to collapse
Ok, I believe that it is time to explain a little bit how GPS works.
The GPS satellites are transmitting their position rapidly. However, due to homeland security issues (US did not want to allow anyone to place a receiver in a jet fighter or a missile) civilian GPS receivers are limited to aquire position every 1 second only. This is not a problem for a normal user even for civilian aviation. Thus, when you look at the NMEA stream, you will see it coming in bursts and not as rapid as normal data. Since GPS strings are quite short, it is good enough for any navigation system.
Number of satellites aquired is not an indicator to anything. Like any RF system, the engineers can tweak the noise level so that it will look to you that you are receiving X amount of satellites, the signal is on the air anyway.
What is important though is the position of the satellites. the closer to the horizon, the less useable that satellite is to calulate the position. Therefore receivers are taking the best located satellites into account and ignoring others even of they are recieved. Valid fix (position) is aquired by at least 3 satellites for 2D (X,Y) and 4 or more for 3D (with elevation).
Result is that as a user, you should not bother too much looking into the stream or number of sattelite in use as long as you can get a valid fix. The important and effective elements are hidden from the user: number of transsistors in the GPS chipset, quality of antenna etc. User can just evaluate the overall preformance.
As I wrote above, the Kaiser integrated GPS surprised me for superb preformance. I just arrived this week from Israel to Germany and could get a fix as soon as I left the underground garage. I did not loose GPS signal even once since I started using the device. That includes forests and dence city centers. Real good job by HTC here.
This is the problem i am facing:
Im using MapKing with Hong Kong 2007 maps. Getting a fix is no problem. I can normally get a fix in about 10-15 secs. When i check the status page I will normally have a connection to 5-7 satelites.
The problem is that the icon does not move smoothly when i travel. In map king your position on the map is represented by a small car icon. It jumps from location to location every 3-5 secs but does not smoothly move along. Can someone please tell me if this is the case with tomtom as well? Maybe it a problem with mapking?
phame said:
This is the problem i am facing:
Im using MapKing with Hong Kong 2007 maps. Getting a fix is no problem. I can normally get a fix in about 10-15 secs. When i check the status page I will normally have a connection to 5-7 satelites.
The problem is that the icon does not move smoothly when i travel. In map king your position on the map is represented by a small car icon. It jumps from location to location every 3-5 secs but does not smoothly move along. Can someone please tell me if this is the case with tomtom as well? Maybe it a problem with mapking?
Click to expand...
Click to collapse
It is a Mapking problem and you should contact their support. Does not happen to me with Destinator, TomTOm and Ozi.
Ok, there is no point to argue, if you really find yourself having problem with GPS update lag, then give it a try. No harm indeed...
In HK, there are people the validity of the work around. GPS proxy might also work as well( i think it is the same principal) just i wasn't aware of this good free software before hand..
http://www11.discuss.com.hk/viewthread.php?tid=5329804&extra=page=2
(u need an account and some chinese word knowledge)
trueman12345 said:
Ok, there is no point to argue, if you really find yourself having problem with GPS update lag, then give it a try. No harm indeed...
In HK, there are people the validity of the work around. GPS proxy might also work as well( i think it is the same principal) just i wasn't aware of this good free software before hand..
http://www11.discuss.com.hk/viewthread.php?tid=5329804&extra=page=2
(u need an account and some chinese word knowledge)
Click to expand...
Click to collapse
Quite agree it's worth trying, and the application has other uses too.
Mike
FYI: I got GPS to work easily by installing GPSViewer, opening COM4/4800baud and getting located. After that, using Google Maps was a breeze; total "trick" took me about 1 minute to figure out which is way quicker than some other workarounds on the internet.
I was driving with iGuidance for about 1 hour this morning and I'm seeing different behavoir for this bug. iGuidance also has an excellent GPS signal viewer, mine was showing 8 out of 8 sattellites, all green, all the time (they turn red when not receiving signal from a sat). My map was moving about once per second or slightly faster. The program only paused once after about 30 minutes into the trip, for about 20-30 seconds. The iGuidance program's moving arrow's color also changes color based on signal quality of the combined sattelite lock, Green for good 3D mapping, Yellow for 2D when there are minimal sats for navigating, and Red for no signal data. During this pause the arrow went Red to indicate no data.
This seems like a bug to me.
Hello,
In comparing the altitude reading of the internal GPS with two other GPS recievers (one WAAS enabled) and in knowing the true altitude (at several airports), it seems that the At&t Tilt is always reading about 100-120 feet low compared to the other two receivers and the actual altitude. Have any others noticed this?
I have never seen an accurate or high reading, it has been lower than the the other recievers at every location and test that I have done. I upgraded to the new AT&T HTC Rom as soon as I recieved the phone and do not have data before this upgrade.
Thanks,
John
Docj_Aero said:
Hello,
In comparing the altitude reading of the internal GPS with two other GPS recievers (one WAAS enabled) and in knowing the true altitude (at several airports), it seems that the At&t Tilt is always reading about 100-120 feet low compared to the other two receivers and the actual altitude. Have any others noticed this?
I have never seen an accurate or high reading, it has been lower than the the other recievers at every location and test that I have done. I upgraded to the new AT&T HTC Rom as soon as I recieved the phone and do not have data before this upgrade.
Thanks,
John
Click to expand...
Click to collapse
Sorry I only use the GPS for directions, but, what program are you using to get your reading? 100-120 feet of difference seems like a program issue. Tilt GPS should not be that inaccurate. Maybe you could try a different program and see if you get a different result.
I have used many different programs and they all give the same altitude (the same as that contained in the NMEA string). VisualGPS, NoniGPS, GPS Tuner, GPS Utilities, and others all give the same; hence the confusion.
John
Docj_Aero said:
I have used many different programs and they all give the same altitude (the same as that contained in the NMEA string). VisualGPS, NoniGPS, GPS Tuner, GPS Utilities, and others all give the same; hence the confusion.
John
Click to expand...
Click to collapse
I have seen the same results using a myriad of gps software. I dont have a fix either, just confirming your observations.
Has anyone either noticed this error, or can verify that their unit is in fact agreeing with other gps receivers?
I called tech; they were not much help.
I have the same problem.. I fly a powered paraglider, and I want to plot my path on Google Earth. All of the points end up being below ground, unless I am very high in the sky
I have a 8925 stock rom with APIC on it, I have matched the readings on it to a Garmin 430, now keep in mind the antenna on the 8925 does not have the same sensitivity nor size/location as the 430s. I would not shoot a approach with my 8925, though it's readings (GS, ALT, HDG) match up to the 430.
Also does anyone know if the 8925 can be WAAS enabled?
Altitude calculation is an issue with commercial GPS devices. You can read more here http://www.gpspassion.com/forumsen/topic.asp?TOPIC_ID=10915
not true, aircraft shoot GPS approaches all the time, a cat II approach has a minimum decision height of 200', so if it is common for a WAAS GPS to be that off, planes would be lawn darting left and right.
That said I have noticed that the vertical navigation accuracy of my non-WAAS 8925 improves greatly when it is at altitude (500' + AGL), now if it was WAAS I would be accurate at low altitudes as well at any airports that supports a GPS approach.
From wikipedia:
The elevation display from the internal GPS will be inaccurate due to it using the WGS-84 Datum which can deviate from mean sea level in the range of +85 to -107 meters. The main reason for this is because the internal GPS uses the data it receives and references it to the Ellipsoid model of the earth which is a perfect shape. Standalone GPSes use the Geoid model of the earth which is lumpy version of an Ellipsoid. Then they apply a correction value based on the present location to supply the elevation.
Click to expand...
Click to collapse
This makes it sound as if it's a hardware problem that cannot be fixed.
Dave
right from the wiki for the htc tilt wikipedia site.... read through but your info will be in the last paragraph of this read.
GPS Compatibility
Users of this phone have successfully installed and used other GPS map software applications (such as ALK Technologies CoPilot Live 7, DeLorme Street Atlas USA 2009, Fugawi, Garmin Mobile XT, Google Maps Mobile, iNav iGuidance, Intrisync Destinator, Microsoft Live Search Mobile, TomTom, Tracky, and VisualGPS BeeLineGPS), which are either free or cost nothing beyond the original purchase price. The map applications are compatible with the built-in GPS receiver, provided users set the appropriate COM port for the map application. The built-in GPS receiver was intended by some wireless providers to be used preferably with Telenav, which is a service that charges users monthly fees or fees based on the amount of downloaded map data. It should be noted that Telenav can only provide map data in areas where applicable cellular phone services are available and that users must have a data plan with their wireless providers.
The GPS may not activate when the phone is used indoors (or without access to clear sky) or if the person is walking very slowly (< 1 mile/hour).[citation needed] External GPS antenna connection provision is provided for clear signal reception. It is important for the GPS to be activated for the various functions in the GPS software to be activated and used properly.
The elevation display from the internal GPS will be inaccurate due to it using the WGS-84 Datum which can deviate from mean sea level in the range of +85 to -107 meters.The main reason for this is because the internal GPS uses the data it receives and references it to the Ellipsoid model of the earth which is a perfect shape. Standalone GPSes use the Geoid model of the earth which is lumpy version of an Ellipsoid. Then they apply a correction value based on the present location to supply the elevation.
Click to expand...
Click to collapse
Hi everyone,
Have anyone noticed the slow calculation/refresh rate of GPS once it's active and navigating? Hold it in your hand and walk, there will be no refresh rate at all ! Your speed will be at 0 km/hr and the co-ordinates will not change at all. If you are in a car and it's stand still or on a traffic signal, or if there's a traffic jam and you are standstill and very immediately you have to turn right/left, you are sure to lose your way since it takes some time after the vehicle is in motion already to calculate and refresh your actual position and speed. Even when you are driving, there's a constant slow refresh rate of around 4 seconds. i.e. say you are accelerating the speed of your car, notice the speed being shown on the GPS software, it'll show your actual speed at a delay of 4/5 seconds. Same goes when you apply brakes, your speed suddenly goes down but the GPS will take it's time to reflect the correct speed.
I must say I am very disappointed with the GPS performace since my last phone was Trinity, it's GPS chip is just normal/ no agps but it's performance is much better than diamond's GPS. Trinity's GPS is immediate refresh rate with no such delays at all.
Test your diamond GPS observing what I said in this post and please post results here.
Are u sure it`s GPS issue not an software one ? Which software do you use for navigation ?
It's not a software issue since I've used TomTom and Garmin MobileXT with same results.
Same issue here!
Plus, the serial port keeps disconnecting of the internal GPS receiver keeps on disconnecting...
Which radio version have you on your device? This for sure software related (firmware, GPS navigation software or drivers)...
HastaSSSS
Have you enabled the AGPS on tweak? I found with this on the port would consistently connect and disconnect. Plus the refresh rate on TomTom was very very slow either driving or walking.
Today I turned AGPS off as where I travel it's not really needed anyway and bam!
Refresh rate both driving and walking is as good as my TomTom unit.
Today I drove with them both on and they were virtually in sync on the maps and spoken directions all the way. Very pleased.
Oh and ensuring "Receive all beams" is off in connections can help with TomTom too.
My details in case this has anything to do with it...
ROM : 1.37.405.1
Date: 10/06/2008
Radio: 1.00.25.03
Protocol: 52.26a.25.09H
And can you change the gpx settings under WM settings?
Even if I try to change the baud rate, when I go inside the configuration file, it's back to 4800 again...
HastaSSSS
This is a common problem with modern GPS chipsets - the way that they reduce multipath interference (from tall buildings, etc.) means that they often ignore movements below a certain speed (which can be often higher than walking pace).
Assuming that the HTC Touch Diamond uses the SirfStar 3 chipset (does anyone know for sure), this problem could theoretically be reduced by altering the 'static navigation' setting (see point 4 in this post for more details on static navigation and why it results in poor low-speed accuracy). However, how you'd actually tell the chipset to disable this feature, I don't know...
On an unrelated note, I have to say I'm extremely impressed with the sensitivity of the GPS chipset in the Diamond - it's managed to get lock in the middle of the my house, which is an amazing feat, and not one I've seen either my MTK or SirfStar standalone receivers achieve.
I am also pretty satisfied with the GPS performance. Can't complain on that!
snoopstah said:
This is a common problem with modern GPS chipsets - the way that they reduce multipath interference (from tall buildings, etc.) means that they often ignore movements below a certain speed (which can be often higher than walking pace).
Assuming that the HTC Touch Diamond uses the SirfStar 3 chipset (does anyone know for sure), this problem could theoretically be reduced by altering the 'static navigation' setting (see point 4 in this post for more details on static navigation and why it results in poor low-speed accuracy). However, how you'd actually tell the chipset to disable this feature, I don't know...
On an unrelated note, I have to say I'm extremely impressed with the sensitivity of the GPS chipset in the Diamond - it's managed to get lock in the middle of the my house, which is an amazing feat, and not one I've seen either my MTK or SirfStar standalone receivers achieve.
Click to expand...
Click to collapse
It's a good theory, no doubt about that, but I think it's more a lag in the communication between the receiver and the phone, or a lag on the rendering of the map.
Your explanation doesn't foresee as well the reason why the connection keeps falling...
But I've learned already something with your post. Didn't knew about that "feature" or "characteristic" of the SIRF III receivers.
HastaSSSS
My experience with the Diamonds GPS is 100% better than on my HTC P3600.
I primarly use the GPS with google maps in Canada, and Jamaica and it gives me accurcy to about 15 feet.. where with the 3600 it was accurate to about 30-40 feet. Normally have about 7 to 8 stats connected. Didn't touch any of the default settings on the phone.
I also tested with Live Search and GPS tuner v5 and works perfectly. Fast lock times (5-10seconds)....
Chris
snoopstah said:
This is a common problem with modern GPS chipsets - the way that they reduce multipath interference (from tall buildings, etc.) means that they often ignore movements below a certain speed (which can be often higher than walking pace).
Assuming that the HTC Touch Diamond uses the SirfStar 3 chipset (does anyone know for sure), this problem could theoretically be reduced by altering the 'static navigation' setting (see point 4 in this post for more details on static navigation and why it results in poor low-speed accuracy). However, how you'd actually tell the chipset to disable this feature, I don't know...
On an unrelated note, I have to say I'm extremely impressed with the sensitivity of the GPS chipset in the Diamond - it's managed to get lock in the middle of the my house, which is an amazing feat, and not one I've seen either my MTK or SirfStar standalone receivers achieve.
Click to expand...
Click to collapse
If that's true according to the static navigation thing? how can we disable it on our diamond? Can somebody throw a clue?
About AGPS, I haven't enabled it, or it's enabled by default in the new rom? 1.37 one?
It's like this with even AGSP disabled so it's certainly not the AGPS which is causing this delay in reception.
After googling and studying, i've found out that it's indeed the STATIC NAVIGATION which has been enabled by default on the diamond chip. Somone have any idea how to disable it? Please share
nice to see that I m not the only one with that problem, I was asking myself if it was my device who was deffective. On my cruise there was no lag at all.
I took mine out walking today and noticed it was telling me I was stood still for about 30 yds.
So I took it and my standalone out and the Diamond is rubbish but my big tomtom unit is great!
What's the point of GPS in a handheld device if you can't use it walking?
I hope this is easy to remedy.
I'm pretty sure that they don't use SirfStar III which would present much better GPS performance. Most probably they just incorporated the GPS section in the Qualcomm processor. Of course you can buy a SirfStar III Bluetooth receiver, but it doesn't make sense if you already got GPS built-in the device. I can only say that I was using HTC Hermes with SS III BT receiver a lot (more than 8 hours daily) and when I heard that HTC Kaiser had GPS build-in I was very happy untill almost immediately after trying TomTom on my new device I noticed worse performance. With Diamond it's the same story. Unfortunately...
A-GPS.
When I got the phone I installed the advanced config tool to adjust soms settings.
I also noticed A-GPS was off.
So I was thinking that turning it on might be a smart move.
Which it wasn't. TomTom reception was bad, waiting minutes would give maybe 4 sattelites en losing them constantly.
After turning of A-GPS again.. Whitin secconds .. I got 8 sattelites with a steady signal.
TomTom works fine for me now.
Excuses for my bad english...
for "foot" navigation the igo8 has a special setup along with "car", "bicycle"' "public transportation" and so on...why blame the diamond? blame yr navigation software! how many ppl said their navigation is the best? best, my ass the best.
be cool, soon igo8 is going to be avaible for diamond also
as for the diamond's gps...it works inside my house, first floor !!!
I really feel for you guys. GPS is one thing I definitely want to be working perfectly, and I can say with the diamond so far that has been the case. I'm getting a lock in about 15-20 seconds with about 12 satellites. I'm also using QuickGPS with no problems. I have been using the new TomTom 7 and it is absolutely fantastic!!!!!! Best handheld GPS solution I've ever owned, and I don't see why it would not be identical to a TomTom PNA!
My GPS is also not accurate, I'm using Tomtom7 and its telling me my home address is atleast 30 metres away when I'm at my home address. What the hell!!!!
I have tried enabling and disabling the A-GPS option and still its the same result.
GPS Questions that I haven’t seen in other threads.
Along with many of you I'm trying to get my GPS to obtain a fix faster.
I have a Tilt (8925 / TYTNII) / WM6.1 with Garmin Mobile XT (no data plan just wifi). I’ve had an issue for the past year with the GPS not locking on for up to fifteen minutes even though it appears to see up to nine good satellites. HTC replaced the mother board which includes the Qualcomm GPSone chip. This corrected most of the problems but at times it still takes a long time to lock on even though it shows satellites with good signal strength. QuickGPS comes loaded on the phone yet has no effect on how long it takes to lock on. It’s my understanding that the satellite locations are loaded in an almanac on the phone. Since this data changes it must be refreshed on a regular basis for the chip to lock on quickly. I have several questions.
1) Is the almanac / ephemeris data stored on the GPSone chip’s memory (if it has any) or does it reside in the phones memory? If it’s on the phone can it be read?
2) Does each satellite transmit at a different frequency and does the GPSone chip scan these frequencies looking for a satellite that can download the latest almanac and ephemeris data?
3) QuickGPS doesn’t seem to make any difference on my phone. Is this program what’s called “assisted GPS”? If so does QuickGPS update the GPSone’s ship data or the GPS software’s data you are using such as Google maps or Garmin? I assume it’s the GPSone’s data because the chip must send a “sentence” to your GPS software telling it that the chip has locked on to enough satellites to provide navigation. Until this happens the GPS software just waits or times out. When I look in the registry I see that enableAGPS dword is set to 00000000. Wouldn’t this have to be a one for assisted GPS to work? I tried setting it to a 1 but it didn’t make any difference.
4) I download data using QuickGPS (via wifi). How can I tell that the data is for my area or if it is being used by the GPSone chip? It’s using 193.253.42.109 which is a site in California called Geo Information. Is the almanac information global? In other words does QuickGPS provide information on all GPS satellites in every download? If I do a soft reset and then run QuickGPS and then start Garmin I don’t see any satellites for about two minutes. It then appears to load almanac data from the first satellite it sees and then a bunch of satellites pop up all at once. That’s why I don’t think QuickGPS is helping.
5) This seems to be a huge problem with our phones. Could someone write a script to poll the GPSone chip say every two hours which would in turn refresh the GPS data so that whenever we need to use the GPS it would be doing a warm start rather than a cold?
Thanks for any insight. I’m lost in more ways than one.
Frank
Im not sure whats causing ur issue! but i never thought quickgps helps. its always the usual slow gps connectivity in my phone. just thought i will add my 2 cents...
Get this http://www.visualgps.net/VisualGPSce/default.htm program. Go outdoors (not between tall building) in an open area. Run VisualGPSce, see if it locks within 2-3 minutes. Once it locks, you can try other programs.
Make sure you GPS is set to com4 and preferably 38400 bps.
GPS coverage is not so good inside the buldings. Wood buildings are fine. Buildings and cars with UV protection and tinted glass are trouble. Also concrete walls/roof are another trouble.
Also to add, QuickGPS never helped me.
FrankCB said:
GPS Questions that I haven’t seen in other threads.
Along with many of you I'm trying to get my GPS to obtain a fix faster.
I have a Tilt (8925 / TYTNII) / WM6.1 with Garmin Mobile XT (no data plan just wifi). I’ve had an issue for the past year with the GPS not locking on for up to fifteen minutes even though it appears to see up to nine good satellites. HTC replaced the mother board which includes the Qualcomm GPSone chip. This corrected most of the problems but at times it still takes a long time to lock on even though it shows satellites with good signal strength. QuickGPS comes loaded on the phone yet has no effect on how long it takes to lock on. It’s my understanding that the satellite locations are loaded in an almanac on the phone. Since this data changes it must be refreshed on a regular basis for the chip to lock on quickly. I have several questions.
1) Is the almanac / ephemeris data stored on the GPSone chip’s memory (if it has any) or does it reside in the phones memory? If it’s on the phone can it be read?
2) Does each satellite transmit at a different frequency and does the GPSone chip scan these frequencies looking for a satellite that can download the latest almanac and ephemeris data?
3) QuickGPS doesn’t seem to make any difference on my phone. Is this program what’s called “assisted GPS”? If so does QuickGPS update the GPSone’s ship data or the GPS software’s data you are using such as Google maps or Garmin? I assume it’s the GPSone’s data because the chip must send a “sentence” to your GPS software telling it that the chip has locked on to enough satellites to provide navigation. Until this happens the GPS software just waits or times out. When I look in the registry I see that enableAGPS dword is set to 00000000. Wouldn’t this have to be a one for assisted GPS to work? I tried setting it to a 1 but it didn’t make any difference.
4) I download data using QuickGPS (via wifi). How can I tell that the data is for my area or if it is being used by the GPSone chip? It’s using 193.253.42.109 which is a site in California called Geo Information. Is the almanac information global? In other words does QuickGPS provide information on all GPS satellites in every download? If I do a soft reset and then run QuickGPS and then start Garmin I don’t see any satellites for about two minutes. It then appears to load almanac data from the first satellite it sees and then a bunch of satellites pop up all at once. That’s why I don’t think QuickGPS is helping.
5) This seems to be a huge problem with our phones. Could someone write a script to poll the GPSone chip say every two hours which would in turn refresh the GPS data so that whenever we need to use the GPS it would be doing a warm start rather than a cold?
Thanks for any insight. I’m lost in more ways than one.
Frank
Click to expand...
Click to collapse
1. Stored in phone memory, and yes it can be read.
2. A GPS receiver calculates its position by precisely timing the signals sent by the GPS satellites high above the Earth. Each satellite continually transmits messages containing the time the message was sent, precise orbital information (the ephemeris), and the general system health and rough orbits of all GPS satellites (the almanac). The receiver measures the transit time of each message and computes the distance to each satellite. Geometric trilateration is used to combine these distances with the location of the satellites to determine the receiver's location. The position is displayed, perhaps with a moving map display or latitude and longitude; elevation information may be included.
3. QuickGPS is not Assisted GPS. QuickGPS downloads the latest satellite positions to help with a faster initial GPS fix. Assisted GPS uses your cell-phone location through cell-tower triangulation to provide a location just like a GPS receiver would. Usually not as accurate.
4. QuickGPS downloads a global catelog. The amount of satellites used for GPS aren't so numerous that it needs to download just the ones in your area. It basically downloads a text listing of all the available GPS satellites.
5. Have you tried flashing a new radio to your device? This can make a world of difference in GPS fix acquisition, especially in different areas.
Also, have you read this?
Thank you for all the info. I just found this article
I'm still not sure why QuickGPS isn't helping. While on my quest for GPS information I found this article. It answers a lot of questions. Thanks also for the link to the GPS thread. I had read it before but it didn't answer the questions I posted.
http://arstechnica.com/gadgets/news/2009/01/assisted-gps.ars
my Tilt locks onto 4 or 5 satellites within 10-20 seconds, usually faster. I've never had a problem. It even locks onto 2 satellites when I'm in my apartment. I use quick GPS, updated via WiFi, but I haven't updated it for a couple weeks.
I'm running wm6.5, 1.7x radio.