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Bernese GPS Software Version 5.0 - Bernese GNSS Software

Bernese GPS Software Version 5.0 - Bernese GNSS Software

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The extension xxx of the above files is<br />

16.2 Antenna Phase Center Corrections in the <strong>Bernese</strong> <strong>GPS</strong> <strong>Software</strong><br />

xxx = I01 : for files containing the relative antenna phase center model based on the IGS<br />

ANTEX file igs 01.atx, and<br />

xxx = I05 : for files containing the absolute antenna phase center model based on the latest<br />

IGS ANTEX file igs05 wwww.atx.<br />

Download at least the satellite information files. It is recommended that you use the ANTEX<br />

converter PHCCNV to generate your own <strong>Bernese</strong> phase center files (see Section 16.3) to<br />

be sure that all your individually calibrated receiver antennas as well as all receiver antenna/radome<br />

combinations needed for your processing are available. You may also use<br />

CODE’s phase center eccentricity files (PHAS COD.xxx) as long as your <strong>Bernese</strong> phase center<br />

file does not contain additional antennas.<br />

To express the difference between your and CODE’s phase center eccentricity files it is<br />

recommended to replace the string ”COD” in the filename by an identification of your institution.<br />

Furthermore, we recommend to use a similar naming convention for your files,<br />

i.e., indicating the antenna phase center model type and the corresponding pairs of satellite<br />

information and phase center eccentricity files with the extension.<br />

IMPORTANT: Satellite information and phase center eccentricity files form entities that<br />

have always to be used together throughout your processing in order to guarantee the<br />

consistency of satellite antenna offsets and patterns. Do not mix files with extensions *.I01<br />

and *.I05 (see Table 16.1).<br />

When a new satellite is launched no estimated satellite antenna offsets are available<br />

for this satellite. The corresponding entry is missing in the official ANTEX file (e.g.,<br />

igs05 1402.atx) as well as in the <strong>Bernese</strong> phase center eccentricity file. Without these<br />

entries any (near real-time) processing will be aborted. In order to make corresponding<br />

information available before tracking data of brand new satellites gets available,<br />

AIUB/CODE maintains two ANTEX files (I01.ATX and I05.ATX) and makes them available<br />

at http://www.aiub.unibe.ch/download/BSWUSER50/GEN. These files contain mean<br />

antenna offset values of the same satellite type for the newly launched satellite. Apart from<br />

values for new satellites, this ANTEX file is identical to the official ANTEX file. After<br />

estimation of official satellite antenna offsets the IGS distributes an updated ANTEX file.<br />

From that moment on the ANTEX file at our anonymous FTP will again be identical to<br />

the official ANTEX file from IGS.<br />

Table 16.1: List of files to be used together.<br />

Set BSW files BSW ANTEX Model Content<br />

0 SATELLIT.<br />

PHAS IGS.REL<br />

1 SATELLIT.I01<br />

PHAS COD.I01<br />

2 SATELLIT.I05<br />

PHAS COD.I05<br />

not available IGS 01 relative antenna model without<br />

radome codes and block specific<br />

satellite antenna names<br />

I01.ATX IGS 01 relative antenna model with radome<br />

codes and satellite specific antenna<br />

names<br />

I05.ATX IGS05 wwww absolute antenna model with radome<br />

codes and satellite specific antenna<br />

names<br />

<strong>Bernese</strong> <strong>GPS</strong> <strong>Software</strong> <strong>Version</strong> <strong>5.0</strong> Page 333

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