Spectracom GSG-5 series, User Manual With Scpi Manual

Page: 65 / 378

You may also specify an ANTEX file to be used in simulation. The file extension is
.atx
. It con
tains satellite antenna phase center offsets and phase center variations. When present, this
information is used for improving satellite range calculation.
Note: For GLONASS, matching ephemeris and almanac files must be specified
(only the 2- line AGL format is supported, see
ftp://ftp.glonass-
iac.ru/MCC/FORMAT/Format.agl
). In addition, GLONASS almanac files must
be named
*YYMMDD.agl
(i.e., a date must be provided at the end of the file
name).
Note: The GLONASS data at this publicly available FTP site is known to contain
errors. These can cause the GSG to generate signals that are deemed ‘bad’ by a
receiver and may not be used in a fix or for navigation. This data is not main
tained by Spectracom and is not guaranteed.
Note: The GPS and QZSS almanac files specified must comply with the YUMA file
format and match the first 5 characters exactly for field identification. The spacing
to the rightmost column of data must be preserved. If the file fails to be processed,
verify that the Af0 and the Af1 lines do not contain a space between these pre
fixes and the (s/s). For example, the line must be
Af0(s/s)
, not
Af0 (s/s)
.
Note: RINEX data files in most cases must be full day files. However, when GPS
almanac files are provided, the RINEX records can be of shorter duration. RINEX
files of less than a day duration without supporting GPS and QZSS YUMA
almanac files are limited to start times times only after 1400 hours, and may oper
ate for limited times.
3.5.6 Leap Second
To set a leap second, navigate to Select > [Select Scenario] > Configure [selected scenario]:
View 2/3 > LS: .
3.5 "Select" Menu
CHAPTER
3
•
User Manual GSG-5/6 Series Rev. 26
49