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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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4.3 RINEX Navigation Files<br />

4.3 RINEX Navigation Files<br />

The RINEX navigation message files contain broadcast messages for all satellites collected<br />

during the observation time. The document referenced in Section 4.2.1 includes a description<br />

of this file format. The recommended file naming convention is<br />

ccccdddf.yyN<br />

ccccdddf.yyG<br />

where N designates <strong>GPS</strong> files and G GLONASS files. cccc is a station identifier and dddf<br />

a session string composed of day of year (ddd) and session character (f). yy is the twodigit<br />

year. <strong>GPS</strong> navigation messages contain orbital elements, GLONASS messages give<br />

tabulated Cartesian position in the PZ-90 Earth-fixed frame.<br />

Usually, there is no need to exchange navigation messages collected by all the stations of<br />

a network in separate files. One comprehensive file containing non-redundantly all possible<br />

messages might be preferable. In this case, cccc could be a code for the agency producing<br />

this file.<br />

4.3.1 Import to <strong>Bernese</strong><br />

RXNBV3 (”Menu>RINEX>Import RINEX to <strong>Bernese</strong> format>Navigation files”) converts the <strong>GPS</strong> RINEX<br />

navigation messages (but not GLONASS messages, see below) into <strong>Bernese</strong> broadcast files.<br />

Differential code biases may be extracted from the RINEX navigation message files and<br />

written to corresponding <strong>Bernese</strong> files.<br />

RXNPRE (”Menu>RINEX>Import RINEX to <strong>Bernese</strong> format>Navigation files to SP3”) converts <strong>GPS</strong> and<br />

GLONASS navigation messages directly to the SP3-/SP3c-format (see Sections 4.4 and<br />

22.7.2). The orbits may then be converted to standard orbits using programs PRETAB<br />

and ORBGEN. This is the only way to convert navigation messages to standard orbits for<br />

GLONASS. The program applies the transformation from the PZ-90 coordinate system to<br />

WGS-84 using transformation parameters from file ${X}/GEN/DATUM. For more details see<br />

Section 5.3.<br />

4.3.2 Export from <strong>Bernese</strong><br />

The program BV3RXN (”Menu>RINEX>Export RINEX from <strong>Bernese</strong> format>Navigation files”) transforms<br />

one or more <strong>Bernese</strong> broadcast files to RINEX navigation message files. Normally, one<br />

RINEX output file is created for each <strong>Bernese</strong> broadcast input file. Optionally the messages<br />

from all input files may be written to the same RINEX output file. Program BV3RXN may<br />

only be used to generate <strong>GPS</strong> RINEX navigation message files as there are no <strong>Bernese</strong><br />

broadcast files for GLONASS.<br />

4.3.3 Utilities<br />

CCRINEXN (”Menu>RINEX>Cut/concatenate RINEX files>Navigation files (<strong>GPS</strong>)”) and CCRINEXG (”Menu<br />

>RINEX>Cut/concatenate RINEX files>Navigation files (GLONASS)”) may be used to cut/concatenate<br />

RINEX navigation message files from <strong>GPS</strong> or GLONASS. Consult the on-line help for<br />

more information.<br />

<strong>Bernese</strong> <strong>GPS</strong> <strong>Software</strong> <strong>Version</strong> <strong>5.0</strong> Page 65

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