[IGSSTATION-4340] First GLONASS-K1 satellite active

[Stefan Schaer]

Author: Stefan Schaer


Dear IGS colleagues,

R04, the first GLONASS-K1 satellite launched on day 057, is active as
of day 098 (08 Apr 2011). Corresponding observation data is available
currently only from two particular GNSS receiver types:

ftp://ftp.unibe.ch/aiub/igsdata/y2011/odata_glonass_d098.txt
ftp://ftp.unibe.ch/aiub/igsdata/y2011/odata_glonass_d099.txt

List of IGS receivers currently observing R04:

bake: TPS NETG3           3.4
bogi: JAVAD TRE_G3T DELTA 3.1.7 MAY,31,2010
chur: TPS NETG3           3.4
dubo: TPS NETG3           3.4
flin: TPS NETG3           3.4 P1
frdn: TPS NETG3           3.4
gope: TPS NETG3           3.4 DEC,12,2009P2
iqal: TPS NETG3           3.4 DEC,12,2009 P2
mdvj: TPS NETG3           3.5 DEC,24,2010
nurk: JAVAD TRE_G3TH DELTA3.1.7
pots: JAVAD TRE_G3TH DELTA3.1.7
svtl: TPS NETG3           3.4 MAY,13,2009
tash: JAVAD TRE_G3TH DELTA3.1.7
tn22: TPS NETG3           3.5 DEC,24,2010
unbt: TPS NET-G3          3.4 NOV,05,2009  P2B
urum: TPS NETG3           3.3
vald: TPS NETG3           3.4
whit: TPS NETG3           3.4
wind: JAVAD TRE_G3TH DELTA3.1.7
wtzz: JAVAD TRE_G3TH DELTA3.1.7 MAY,31,2010

With this new satellite (R04) and the recently reactivated satellite
(R03/715), the CODE GNSS orbit products include currently up to 55
satellites (32 GPS plus 23 GLONASS). This also implies that the first
GLONASS-K1 satellite is already included in CODE's orbit prediction
scheme. Once more, it should be emphasized that current data of R14
(722) is considered useless and is therefore generally excluded from
our analysis.

IMPORTANT NOTES:
It is absolutely unpleasant that information on satellite antenna
offsets (concerning both microwave and SLR) is still unavailable from
official side. We started to use zero values and we intend to determine
corresponding values as soon as possible.
Moreover, we decided to use at CODE a GLONASS number of 801 to this
satellite. The NAGU announcing the launch of the first GLONASS-K1
satellite gives 701. That number, however, was already assigned to a
GLONASS-M satellite, which was launched in 2003.

ADDITIONAL NOTE:
The following IGS GNSS receivers are far from completely observing the
operational GLONASS constellation:

bisk: ASHTECH Z18         ZT16 0065
ctwn: TRIMBLE NETR5       3.50
dgav: JPS EGGDT           2.5.0
eprt: LEICA GRX1200GGPRO  8.10/3.019
guug: TRIMBLE NETR5       4.19
isba: TRIMBLE NETR5       NP 4.18 / SP 4.17
mar6: JPS E_GGD           2.6.1 JAN,10,2008
mtka: ASHTECH Z18         0065      ZT16
onsa: JPS E_GGD           2.6.1 JAN,10,2008
pove: TRIMBLE NETR5       3.84
ske0: JPS E_GGD           2.6.1 JAN,10,2008
tabv: JPS EGGDT           2.5.0
thti: TRIMBLE NETR8       4.17
urum: TPS NETG3           3.3
vaco: ASHTECH Z18         ZT16 0065
vis0: JPS EGGDT           2.6.1 JAN,10,2008

This is specifically true for dgav, tabv (observing just 10 of 22
operational GLONASS satellites due to very old receiver firmware). See
also:

ftp://ftp.unibe.ch/aiub/igsdata/odata_glonass_incomplete.txt

Best regards,

The CODE AC Team