Problems with GLONASS Raw Receiver Data at Start of New Year

From: Richard Langley <>
Date: Fri, 13 Jan 2006 10:51:19 -0400 (AST)

The International GNSS Service (IGS) includes a sub-network of continuously
operating GLONASS monitor stations (about 50) including one at the University
of New Brunswick (UNB1). At UNB1 we lost C1 (coarse code on L1 frequencies),
P1 (precision code on L1), and P2 (precision code on L2) observations on the 5
GLONASS satellites we were tracking at 00:01:30 GPS Time on 1 January 2006
along with phase jumps in L1 (carrier phase on L1) and L2 (carrier phase on
L2). Code measurements were back at 00:04:00.

I have just learned from one of the IGS analysis centres that all January 1
IGS GLONASS observation files that they checked show a similar problem.

-- Richard Langley
   Professor of Geodesy and Precision Navigation

 Richard B. Langley E-mail:
 Geodetic Research Laboratory Web:
 Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142
 University of New Brunswick Fax: +1 506 453-4943
 Fredericton, N.B., Canada E3B 5A3
     Fredericton? Where's that? See:
Received on Fri Jan 13 2006 - 06:51:42 PST

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