[IGSMAIL-6636] Re: igs08_1699.atx: Update including R801 (R26)

[Richard B. Langley]

With regards to the GLONASS-K1 satellite R801 (a.k.a. 701K):
1) As far as I know, the GLONASS almanac still has room for only 24  
satellites. As yet, there is no almanac slot 26. Note that the  
satellite is physically near orbital slot 21:
http://gge.unb.ca/Resources/GLONASSConstellationPlot.pdf
http://gge.unb.ca/Resources/GLONASSConstellationStatus.txt
2) Some IGS stations (running Javad GNSS receivers) track the K1  
satellite and provide ephemeris records in the RINEX GLONASS  
navigation files. The satellite is identified as "26" in its broadcast  
ephemeris file.
3) I believe no stations are yet supplying observation files that  
include R26. That might be an issue with receiver firmware or binary  
to RINEX conversion software.
-- Richard Langley

On 2-Aug-12, at 2:51 PM, Robert Khachikyan wrote:

> Dear IGS colleagues!
>
> The absolute IGS antenna correction file (igs08_wwww.atx) has been
> updated. The new release is called 'igs08_1699.atx'. It contains the
> following changes:
>
> 1) According to Stefan Schaer (CODE), GLONASS-K1 satellite R801 was
> reactivated utilizing almanac slot 26 in March 2012. Therefore, the
> following satellite has been added to igs08.atx:
>
> R26 (R801)
>
> This change in the GLONASS constellation was announced in  
> [IGSMAIL-6581]:
>> GLONASS-801, the first GLONASS-K1 satellite, launched on February 26,
>> 2011, has been reactivated on frequency channel -5. The designation  
>> of
>> this (25th active) GLONASS satellite is R26.
> http://igscb.jpl.nasa.gov/pipermail/igsmail/2012/006573.html
>
> 2) Upon request from Rusnavgeoset/Trimble, robot calibration values  
> were
> copied from "TRM57971.00     NONE" to the following antenna type:
>
> RNG80971.00     NONE
>
> The agreement of the phase center behavior between the two antenna  
> types
> could be confirmed by the colleagues from Geo++ who calibrated one
> single Rusnavgeoset antenna.
>
>
> The updated antenna correction model is available at
> ftp://igs.org/pub/station/general/igs08_1699.atx
> or
> ftp://igs.org/pub/station/general/igs08.atx
>
> Following discussions at the recent IGS Workshop in Olsztyn, the
> following changes of igs08.atx have to be expected in the near or far
> future:
> - conventional phase center offset values for new GNSS
> - extension of the GPS satellite antenna phase center variations for
> nadir angles > 14°
> - azimuthal satellite antenna phase center variations
>
> With best regards,
> Ralf Schmid and Robert Khachikyan
> on behalf of the IGS Antenna Working Group
> _______________________________________________
> IGSMail mailing list
> IGSMail at igscb.jpl.nasa.gov
> http://igscb.jpl.nasa.gov/mailman/listinfo/igsmail

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| Richard B. Langley                            E-mail:  
lang at unb.ca         |
| Geodetic Research Laboratory                  Web: http://www.unb.ca/GGE/ 
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