Application of BINEX and TEQC for Real-Time Data Management

L. Estey and C. Meertens
(lou@ucar.edu and chuckm@ucar.edu,
303-497-8011)
both at: UCAR/UNAVCO,
Box 3000, Boulder CO, 80307, USA

D. Hunt
(dhunt@ucar.edu)
UCAR/GPS Research Group
Box 3000, Boulder CO, 80307, USA

In order to compress and improve the reliability of real-time data
streams from permanent stations, UNAVCO and the GPS Research
Group have designed a binary exchange (BINEX) format
that can be used with the TEQC software. The
general design of BINEX allows for records in either binary word order,
a scalable checksum or CRC per record, and scalable record indexing.
Prototype data records have been designed for encoding data from Ashtech

and AOA receivers, for use with both GPS and GLONASS constellations.
UNAVCO is installing an Ashtech station in Gabon, Africa, which
will stream GPS and meteorological BINEX data through a VSAT system.
Prior to transmission, the raw data will be converted to BINEX by TEQC
with
a compression of 4:1. Source code and documentation is available at
http://www.unavco.ucar.edu/binex.