Bernese GPS Software Version 5.0 - Bernese GNSS Software

3.3 Session Definition
${P}/MYCAMP/DIR/FILENAME.EXT) is limited to 32 characters in the Bernese GPS Software,
Version 5.0 . The menu displays a warning message if a filename is too long (see
Section 18.3.4 for more information on checks and warnings of the menu).
Like earlier versions of Bernese GPS Software, Version 5.0 does not issue a warning message
before replacing files. It is the responsibility of the users to take care of the file naming within
the campaign.
Starting with Version 5.0 the user can specify the filename of the program output for all
programs (see Section 18.6 for a detailed description). We recommend to name all important
program output and result files in a similar way with a filename containing the session they
refer to. E.g., the program output file of a GPSEST run generating a normal equation
file FIN$YSS+0.NQ0 may get the name FIN$YSS+0.OUT. The session is indicated in this
example by the menu variable $YSS+0 (translated by the menu to yyssss, where yy is the
two-digit year andssss the identifier of the current session). The use of these menu variables
for the file naming is very comfortable, see Section 18.5 for a detailed description. To label
each file with the current session becomes vital if you run the BPE in the multi-session
mode (see Section 19.9).
There are two exceptions to this basic convention. All session independent files (e.g., the
session table SESSIONS.SES) have names without the session identification. In addition, the
names of the observation files are generated automatically. Zero-difference observation files
are written by the programs RXOBV3 (creates observation files from RINEX) and GPSSIM
(creates observation files containing simulated data). The name of these files consists of a
4-character station name abbreviation and the session of the data without the year, e.g.,
the observation file ZIMM1430 contains data from the station Zimmerwald for session 1430.
The program SNGDIF creates single-difference files from two zero-difference files. The name
of the single-difference observation file is composed of the 2-character abbreviations of the
two baseline stations and the session of the data without the year. E.g., BRZI1430 names
data files for the baseline from Brussels to Zimmerwald for session 1430. The station name
abbreviations are taken from a table specified in a program panel input field (default name
${P}/MYCAMP/STA/ABBREV.ABB). The automatic generation of the observation filenames requires
that all abbreviations are unique for all stations.
3.3 Session Definition
A session is a time interval covering all observations which should be processed together. A
campaign consists of one or more sessions that together cover the total observation interval.
The session definition is independent for each campaign. Since the Bernese GPS Software
uses a session-wise processing strategy you must have a session table in each campaign
defining at least one session.
The session identifier is a 4-character string composed as dddf where ddd represents the
day of year (DoY) of the beginning of the time interval and f is an alphanumeric character
identifying the session within the day. For daily sessions this session character usually is
the zero character 0, for hourly sessions the characters A through X are used for hours 00
to 23. Only sessions defined in the session table can be used. Each session is assigned to an
individual time window in the session table, and each observation processed in the Bernese
GPS Software must be associated to exactly one session.
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