[teqc] Different times in rinex files if combined than if separate

[Jack Saba]

Why am I getting different results when running teqc

(a) on three files separately to generate three rinex files

vs

(b) on the three files together to generate one rinex file?

I have three .dat files from a Trimble 5700 receiver. teqc +meta tells 
me the times are consecutive, with a short break between the first 2:

tcsh: teqc +meta JAR1/39320381.dat
! Notice ! GPS week initially set= 1256
filename:                JAR1/39320381.dat
file format:             Trimble .dat
file size (bytes):       41889
start date & time:       2004-02-07 12:32:30.000
final date & time:       2004-02-07 12:43:59.998

tcsh: teqc +meta JAR1/39320382.dat
! Notice ! GPS week initially set= 1256
filename:                JAR1/39320382.dat
file format:             Trimble .dat
file size (bytes):       1719171
start date & time:       2004-02-07 12:49:30.000
final date & time:       2004-02-07 23:59:44.882

tcsh: teqc +meta JAR1/39320390.dat
! Notice ! GPS week in Trimble Record 21/55h = 1256; (default) GPS week 
= 1257
! Notice ! GPS week initially set= 1257
filename:                JAR1/39320390.dat
file format:             Trimble .dat
file size (bytes):       1272415
start date & time:       2004-02-08 00:00:00.000
final date & time:       2004-02-08 08:26:29.921
sample interval:         15.0000

If I run teqc separately on the three files to generate rinex files, the 
times in the rinex files agree with the times above. However, if I try 
<to generate a single rinex file, using

teqc -O.int 15 -O.at "TRM22020.00+GP" -tr d +obs jar1038a.04o \
      JAR1/39320381.dat JAR1/39320382.dat JAR1/39320390.dat

the following lines show up in the middle of the file, where the day 
changes, and the times from the last file are shifted from 2/8 to 2/14:

  04  2  7 23 59 44.8800000  0 12G 6G 2G24G10G29G27G16G 8G13G17G21G26
  -54146557.39547 -42177446.79545 -13116597.0694  -13116602.5974
       2414.5164
:
:
  04  2 14 23 59 59.8800000  4  1
END OF STATIC OBSERVATION                                   COMMENT
  04  2 14 23 59 59.8800000  0 12G 6G 2G24G10G29G27G16G 8G13G17G21G26
  -54182718.82847 -42205624.56645 -13123478.7334  -13123483.7764
       2406.5474

The last epoch in the file is
  04  2 15  8 26 29.8010000  0  9G14G25G30G 4G 6G20G24G 5G 1

Jack Saba
-- 
Jack Saba
jack.saba at gsfc.nasa.gov
Science Systems and Applications Incorporated
Goddard Space Flight Center, Code 614.1
Greenbelt MD 20771
Building 33, Room B123
Phone: 301 614 5878
Fax:   301 614 5644