GPSMAP 66sr Firmware 4.90

Discussion related to the Garmin GPSMAP 66sr GPSr
mimichris
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Re: GPSMAP 66sr Firmware 4.90

Unread post by mimichris »

It's a shame that I didn't think of recording in RINEX when the satellites were flashing version 3.80, now it's too late .....
GPSMAP66sr, GPSMAP67, GPSII+, Twonav Cross.
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GPSrChive
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Re: GPSMAP 66sr Firmware 4.90

Unread post by GPSrChive »

It is true that Garmin does not always publish all changes made to new firmware versions when released.

The device firmware is responsible for user interface operation. The GPS radio firmware is responsible for satellite signal interpretation.

Any and all changes in how the GPSMAP 66sr uses and/or presents satellite information when comparing firmware version 4.90 to 3.80 is purely due to changes made in the user interface software, as the GPS radio firmware was not changed:

GPSMAP 66sr B3694 380 vs 490.png


Of course, you can make any assumptions you wish!

And you could revert to 3.80 and test RINEX data then update again to 4.90 if you are so inclined.

:D
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mimichris
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Re: GPSMAP 66sr Firmware 4.90

Unread post by mimichris »

Hello,
Of course, we can make all possible hypotheses, but I notice that with version 4.90, as soon as I switch on the 66sr at home, in the house, the Multi-band satellites are immediately taken into account and are fixed, but from there to say that one can start a hike immediately after its ignition, I do not know. Better to wait a few minutes.
I can't wait to try it but it rains, it rains even in the south of France 25Km from the Mediterranean.
GPSMAP66sr, GPSMAP67, GPSII+, Twonav Cross.
mimichris
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Re: GPSMAP 66sr Firmware 4.90

Unread post by mimichris »

RINEX 23/08/21:

ALL Satellites:

210823 All.jpg

L1 Satellites:

210823 L1.jpg

L5 Satellites:

210823 L5.jpg



RINEX 25/11/2021:

ALL Satellites:

211125 All.jpg

L1 Satellites:

211125 L1.jpg

L5 Satellites:

211125 L5.jpg



Conclusion: Galileo worked when it was flashing. You were right GPSrChive.


{edited by GPSrChive - combined posts - uploaded images to our host - please do not link to external images!}
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GPSrChive
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Re: GPSMAP 66sr Firmware 4.90

Unread post by GPSrChive »

Thank you mimichris for verifying my theory!
mimichris
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Re: GPSMAP 66sr Firmware 4.90

Unread post by mimichris »

In fact I found these files on my HD well hidden, which I saved about a month after its purchase, but I can not say what the firmware version was, I think 3.30 because I put 3.80 later.
GPSMAP66sr, GPSMAP67, GPSII+, Twonav Cross.
0x01
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Re: GPSMAP 66sr Firmware 4.90

Unread post by 0x01 »

I have seen other RINEX plots (maybe in this forum) proving that Galileo is lost and not acquired again for the powercycle once out of sight. Same which I observed on the 65s. (not tested again with latest firmware)
This can not be only an UI bug.

Link 1: https://forums.geocaching.com/GC/index. ... smap-66sr/
Link 2: https://forums.geocaching.com/GC/index. ... nt=5923666
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GPSrChive
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Re: GPSMAP 66sr Firmware 4.90

Unread post by GPSrChive »

0x01 wrote: Thu Nov 25, 2021 6:42 pm I have seen other RINEX plots (maybe in this forum) proving that Galileo is lost and not acquired again for the powercycle once out of sight. Same which I observed on the 65s. (not tested again with latest firmware)
This can not be only an UI bug.

Link 1: https://forums.geocaching.com/GC/index. ... smap-66sr/
Link 2: https://forums.geocaching.com/GC/index. ... nt=5923666
Let's not abandon the scientific method:
  • The information in the posts provided prove only that while some users observed satellite signals dropping out, others did not.
  • It is also an assumption that the lost signals would only return after power cycling the device.
  • It is a fact that the most recent updates for these Multi-Band devices did not change the GPS radio firmware.
Until such time conclusive evidence proving otherwise is provided, I will continue to believe the improvements observed after the recent device updates are purely a result of UI changes.
mimichris
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Re: GPSMAP 66sr Firmware 4.90

Unread post by mimichris »

0x01 wrote: Thu Nov 25, 2021 6:42 pm I have seen other RINEX plots (maybe in this forum) proving that Galileo is lost and not acquired again for the powercycle once out of sight. Same which I observed on the 65s. (not tested again with latest firmware)
This can not be only an UI bug.

Link 1: https://forums.geocaching.com/GC/index. ... smap-66sr/
Link 2: https://forums.geocaching.com/GC/index. ... nt=5923666
Hello,
According to the RTKlib graph on geocaching.com, the Glonass and Galileo satellites are lost after 10 hours of uninterrupted operation of the 65s, is this due to a saving of energy proper to the 65s after a very long operating time.
Did the person who performed this test stop the 65s and then restart it to see if the Glonass and galileo satellites have returned to normal?
GPSMAP66sr, GPSMAP67, GPSII+, Twonav Cross.
mimichris
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Re: GPSMAP 66sr Firmware 4.90

Unread post by mimichris »

I just noticed that Garmin has changed the interface so much at the satellite level that even if some are not acquired, they no longer flash. It's totally abnormal. However, an unacknowledged satellite must flash.
GPSMAP66sr, GPSMAP67, GPSII+, Twonav Cross.
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