Altitude off

jolo · Posted: Thu Feb 05, 2004 5:28 pm Post subject: Altitude off

My BTGPS is off with about 200 feet in altitude. Anyone outthere that's experienced the same? I've checked with an aeroplane altimeter and Garmin GPS map 295. The altimeter and Garmin showed about the same, but mine about 200 feet to high. Question

// Jolo

lbendlin · Posted: Thu Feb 05, 2004 6:46 pm Post subject:

There have been reports that some firmware versions of SiRF based receivers are calculating/displaying the height correnction wrongly. Maybe your receiver is one of them.
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Lutz

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DavidW · Posted: Sun Feb 08, 2004 9:46 am Post subject:

Your GPS is SiRF based. Read this thread - and the older thread I linked to it.

David

jolo · Posted: Sun Feb 08, 2004 11:18 am Post subject:

Thank's Lutz and David for your answers.
I've sent a mail to Emtac about this. I will post the answer whwn i get it.
How do I know what firmware my GPS have?
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// jolo

DavidW · Posted: Sun Feb 08, 2004 11:48 am Post subject:

If you can switch the GPS to SiRF mode, then GPSTweak will tell you - use the Poll Version option.

I don't know whether or not there's any issues in switching an Emtac between SiRF and NMEA modes. I've lost track of which Bluetooth GPSes have this type of issue and which don't.

David

jolo · Posted: Mon Feb 09, 2004 4:58 pm Post subject:

Thanks!
Shifting between SIRF and NMEA works well with the Emtac program Crux View.
The GPSTweak reports SW Ver: 231.000.000ES so I guess I've got firmvare 2.31.
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// jolo

DavidW · Posted: Tue Feb 10, 2004 4:01 pm Post subject:

That's the same version as in the HI-303MMF receivers that both Alun and I have - just for information as you read those old threads. It is indeed a 2.31 firmware version.

David

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