GravDEx: GRAVitational Deformation EXchange

This file provides a detailed documentation of the GravDEx (GRAVitational Deformation EXchange) file format

• The GravDEx file format is designed to express delay values in a standardized format
• It contains gravitational deformation information for various antennas, i.e., the extra delay introduced by deformation of the antenna and its standard deviation
• The delay values are specified for defined azimuth and elevation steps
• The units are picoseconds

Technical details

• The GravDEx file format is based on the ANTEX format used in GNSS antenna calibration
• The GravDEx file format consists of labelled parameter records and section markers
• The nominal length of a record is at most 80 characters
• Predefined labels are located in columns 61 through 80 and are leftaligned without leading blanks
• To ensure both human and machine readability, the GravDEx file format is based on text files that use 8-bit encoding in accordance with the Unicode standard