[IGSSTATION-6961] CUUT receiver firmware downgrade to v5.10

[Octavian Andrei]

[Apologises for late posting]

Dear colleagues,

The NetR9 receiver firmware at CUUT has been downgraded to v5.10:

3.6  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5427R49036
     Firmware Version         : 5.20
     Elevation Cutoff Setting : 0
     Date Installed           : 2017-01-13T03:06Z
     Date Removed             : 2017—02-16T17:58Z
     Temperature Stabiliz.    : 
     Additional Information   : Multipath mitigation enabled

3.7  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5427R49036
     Firmware Version         : 5.10
     Elevation Cutoff Setting : 0
     Date Installed           : 2017-02-16T18:03Z
     Date Removed             : CCYY-MM-DDThh:mmZ
     Temperature Stabiliz.    : 
     Additional Information   : Multipath mitigation enabled

The new station log may be found here: 
https://www.dropbox.com/s/gg5r5vfzgwom4sx/cuut_20170217.log <https://www.dropbox.com/s/gg5r5vfzgwom4sx/cuut_20170217.log>

We have identified a significant drop in the number of observations from BDS satellites. It appears that the BDS satellite tracking is completely lost for some periods of time (as reported in IGSSTATION-6952).
The first guess was to assume some tracking issues with the firmware v5.20.
We are still trying to understand why such receiver behaviour.

Thanks to Ryan and Elmar for their replay comments.

Kind regards,
Octavian
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