[teqc] LB2 format: strange epoch on Sunday at 00:00:00

Lou Estey lou at unavco.org
Mon May 17 07:47:53 MDT 2004


A teqc user has reported the following problem to me.  They are
using a Leica SR520, firmware version 4.20, and they happen to
be collecting data at 1-sec sampling.  All is well except for the
first epoch at 00:00:00 _each Sunday_.  In a pseudo-RINEX format
(i.e. not worrying about the f14.3 format of each observable),
the first two epochs on Sunday 9 May 2004, for example, are:

  04  5  9  0  0  0.0000000  0  7G30G 4G 7G 9G 5G14G26
-952813895016586.25047-742452385727200.62548-181314455576023.1564 -181314455576024.0004
-952813890402674.00047-742452382131944.75047-181314454698022.5944 -181314454698023.5944
-952813892717556.75047-742452383935734.37548-181314455138535.4064 -181314455138536.3444
-952813910474143.37549-742452397772042.00049-181314458517504.9064 -181314458517506.4384
-952813907742621.50049-742452395643588.75049-181314457997711.4384 -181314457997712.8124
-952813889813384.25046-742452381672770.25047-181314454585885.8124 -181314454585887.6254
-952813887830525.75047-742452380127682.12547-181314454208562.6254 -181314454208562.5314
  04  5  9  0  0  1.0000000  0  7G30G 4G 7G 9G 5G14G26
  120980608.01148  94270613.11248  23021842.9044   23021842.1524
  125595702.97747  97866790.54147  23900068.5114   23900067.6074
  123285243.53447  96066447.64648  23460397.5124   23460396.6934
  105526390.21749  82228373.76849  20080996.6174   20080995.1544
  108256298.42849  84355569.53849  20600483.0184   20600481.6284
  126183843.30946  98325069.35347  24011986.4204   24011984.7684
  128173221.67447  99875238.11447  24390550.4434   24390550.6524

where you are looking at L1 L2 C1 P2.  At the moment, I don't see
how this could be a teqc translation bug, especially since it only
occurs on one epoch: each Sunday at 00:00:00.  (I suspect a firmware bug.)

Has anyone else ever seen this type of problem in LB2 data?

BR,
--lou

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Louis H. Estey, Ph.D.              office:  [+001] 303-381-7456
UNAVCO, 6350 Nautilus Drive           FAX:  [+001] 303-381-7451
Boulder, CO  80301-5554            e-mail:  lou  unavco.org
    WWW:  http://www.unavco.org   http://jules.unavco.org

"If the universe is the answer, what is the question?"
                                                -- Leon Lederman
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