[IGSMAIL-5823]: GLONASS negative frequency channels (2)

[Stefan Schaer]

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IGS Electronic Mail      29 Aug 07:26:18 PDT 2008      Message Number 5823
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Author: Stefan Schaer


Dear IGS colleagues,

A survey of CODE's RINEX database shows that still 20 of 105 GLONASS
tracking stations are unable to sample GLONASS zero and negative
frequency channels (5 GLONASS, namely R09, R11, R13, R15, R17):

azco:     R11     R15      TPS LEGACY          3.2 DEC,20,2007    
bako:     R11     R15      LEICA GRX1200GGPRO  5.00/3.013         
cagz:                      TPS E_GGD           3.1 MAR,13,2007 P2 
crar:                      TPS ODYSSEY_E       2.5 JUN,22,2005 P1 
mal2:     R11     R15      JPS LEGACY          3.2                
mat1:                      ASHTECH Z18         0065               
metz:                      JPS EUROCARD        2.3 NOV,12,2002    
mobj:                      TPS LEGACY          2.3 APR,28,2004 P4 
mtbg:     R11     R15      TPS GB-1000                            
mtka:                      ASHTECH Z18         0065      ZT16     
park:                      JPS E_GGD           2.5                
pfa2:                      TPS E_GGD           3.1 JUN,28,2007 P3 
pous:                      TPS GB-1000         2.5 APR,07,2005 P1B1
snec:                      TPS GB-1000         2.5 JUN,22,2005 P1 
sunm:                      JPS LEGACY          JPS_4 / 2.3 NOV,12,
sydn:                      JPS E_GGD           2.3P3              
tixj:                      TPS ODYSSEY_E       2.5 JUN,22,2005 P1 
unpg:                      TPS ODYSSEY_E       3.1 JUN,28,2007 P3 
ven1:                      ASHTECH Z18         0065      ZT16     
vesl:         R13          TPS GB-1000         3.1 JUN,28,2007 P3 

An updated list of affected GNSS stations may be found at:

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

We pointed to this tracking deficiency already in several IGS Mails
(5650, 5668, 5695):

http://igscb.jpl.nasa.gov/mail/igsmail/2007/msg00130.html
http://igscb.jpl.nasa.gov/mail/igsmail/2007/msg00148.html
http://igscb.jpl.nasa.gov/mail/igsmail/2008/msg00017.html

We ask the station operators responsible for the stations listed above
to upgrade the receiver firmware asap. From the list

ftp://ftp.unibe.ch/aiub/igsdata/tracking_glo_neg_freq.txt
 
we may conclude that the most recent GNSS receiver firmware versions
are:

2.6.1, 2.7.0 for JPS
6.00         for LEICA GRX1200GGPRO
3.30 (?)     for NOV
3.3          for TPS
3.64         for TRIMBLE NETR5

It is worth mentioning that the following stations do not provide
GLONASS observations although they are equipped with GPS/GLONASS
receiver models:

cnmr:                      TRIMBLE NETR5       NP 3.50 / SP 0.00
gope:                      ASHTECH Z18         0065
guug:                      TRIMBLE NETR5       NP 3.50 / SP 0.00
mat1:                      ASHTECH Z18         0065
ntz1:                      TPS NETG3           3.2 DEC,12,2007

Best regards,

The CODE AC Team