[IGSSTATION-5396] Re: JOZ2, JOZE: health bits corrected

[Jake Griffiths - NOAA Federal]

The proposed resolution (below) for the Leica GRX1200GGPRO
apparently results in a loss of tracking for PRN30, and any
other "unhealthy" satellite. The desired fix would maintain
tracking of all-in-view while also reporting the correct
health bits information.

So, the information available so far seems to indicate an
issue with the Leica receiver firmware. If others have
found differently, then I think that would be of general
interest.

Thanks again for your interest in resolving this issue.

Best,
jake

On 4/30/2013 2:48 PM, Jake Griffiths - NOAA Federal wrote:
> Dear Colleagues,
>
> At my request, Tomasz has kindly provided the following information about how
> the issue was resolved on these two receivers:
>
>  > In the case of JOZE (Trimble 4000SSI) receiver, the latest version of teqc (15
>  > Mar 2013) solved the problem.
>  >
>  > This issue is also confirmed by one of the corrections made for this release:
>  >
>  > "- a correction for extracting the GPS health bits from Trimble .dat/.tgd
>  > records 21 and 28 and Trimble stream records 0x55-1 and 0x55-9"
>  >
>  > In case of JOZ2 (Leica GRX1200GGPRO) receiver, the problem was probably
>  > caused by the receiver's setting: 'satellite health' which was unfortunately
>  > set to 'OK' for all GPS satellites (meaning 'all healthy'). In short: I
>  > changed this option to 'Automatic' and deleted the existing almanac from the
>  > receiver. More specifically: I stopped the receiver and used the Leica's Web
>  > Interface to correct the receiver settings, i.e.:
>  >    1. I deleted existing almanac from the receiver (button "Initialize (INIT)
>  >       Ephemeris and almanac" on the "Configuration/Tracking" page)
>  >    2. I changed the 'satellite health' receiver setting to 'Automatic' for
>  >       GPS satellites (also "Configuration/Tracking" page, tab "GPS")
>  >    3. I rebooted the receiver (just in case) and started it.
>  >
>  > This procedure helped in case of our Leica receiver.
>  >
>  > With best regards,
>  > Tomasz
>
> Thanks very much to Tomasz for these efforts.
>
> fyi,
> jake
>
> On 4/30/2013 11:37 AM, Tomasz Liwosz wrote:
>> Dear Colleages,
>>
>> the issue concerning incorrect health bits for a GPS satellite PRN30/SVN35
>> (IGSSTATION Mail no. 5385) has been resolved for JOZ2 and JOZE stations; GPS
>> navigational RINEX files are now reporting this satellite as 'unhealthy'.
>>
>> Correct daily and hourly files from JOZE (Trimble 4000SSI, 7.29) available since
>> 118/2013.
>> Correct hourly files from JOZ2 (Leica GRX1200GGPRO, 8.20/3.019) available since
>> 119/2013. Daily file for 119/2013 still contains one bad record; correct daily
>> files expected from 120/2013 on.
>>
>> We apologize for the inconvenience this caused.
>>
>> With kind regards,
>> Tomasz Liwosz
>>
>>
>> _______________________________________________
>> IGSSTATION mailing list
>> IGSSTATION at igscb.jpl.nasa.gov
>> http://igscb.jpl.nasa.gov/mailman/listinfo/igsstation
>>