User visible changes in the firmware version 3.7.2 since version 3.7.1.

                             Highlights.

1. GLONASS ephemeris: fixed wrong Tk in ephemeris got from RTCM3
   stream.

2. New parameter to select the source of navigation data has been
   added.

3. TRE_3: SIGMA support fixed.

4. TR_3N: support for this new board implemented.

5. TRE_3 TRE_3N TRE_QUA TRE_DUO: fix permanent exception on startup
   when clock generator fails, by re-programming clock generator.

6. TRIUMPH2: support rev.9

7. TRIUMPH2: rev.8: correct measurements of external voltage

8. PVT: fixed bug of application of ephemeris when
   /par/pos/SYS/navdata parameter is set to 'any' which causes using
   of unhealthy ephemeris when healthy ones exist.

9. External disk: fix multiple problems appeared in corner cases of
   disk removal on the fly.

10. TR_G2THDA rev.4: fix refusing to turn on after disconnecting and
    re-connecting power.

11. GLONASS: fixed wrong receiver date at the beginning of GLONASS
    4-years period.

12. JPS-messages [mp] and [MP]: UTM northing should be negative
    for south hemisphere.

13. TRE_3,TRE_3N: support up to 5 log-files.

14. TRH_G2P: support for this new board implemented.

15. GPS ephemeris: fixed bug of loss of integrity of CNAV ephemeris

16. BeiDou: fixed bug - PRN#17 is GEO satellite.

17. UHF,FH915: Support JRADIO modem.

18. Disable using of extrapolated clock and/or fixed altitude in all
    positioning modes but stand-alone one.

19. TRE_QUA: fixed bug, NMEA HDT message contains now heading instead of course

20. RTCM3 MSM: fixed bug in compatibility with components of signals
    which are different from ones which receiver tracks.

21. DELTA: Support Interconnect board revisions 1.1 (for type 6) and
    1.1 (for type 7).

22. Non RTK engine: added switching of signals used in solution
    when SNRs of currently used signals become below defined SNR mask.
    This algorithm takes effect only with independent tracking of signals.

23. External USB disk: fix termination of files transfer when a file
    starting with dot exists on the receiver file-system.

24. TRE_3: supportr rev.6 of the board.


                      More Detailed Description
                (refer to GREIS for even more details)


                             1. Messages.

<NO CHANGES>

                             2. Parameters.

2.1 New parameter to select the source of navigation data

Name:           /par/pos/navdata/source
Access:         rw
Type:           enumeration
Values:         off,sat,ext,any
Default:        sat
Description:    Select the source of navigation data.
                Value "off" disables all possible source of navigation data.
                Value "any" enables all possible source of navigation data.


                             3. Options.

<NO CHANGES>

                             4. Miscellaneous.

<NO CHANGES>

<END>
