ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / For the final evaluation of a GPS attitude determination algorithm, it was determined its true
performance in terms of its accuracy, reliability and dynamic response. To accomplish that, a
flight test campaign was carried out to validate the attitude determination algorithm. In this
phase, the measured aircraft attitude was compared to a reference attitude, to allow the
determination of the errors. The system was built using non-dedicated THALES Z-FX airborne
GPS receivers and a complete Flight Tests Instrumentation (FTI) System. Each GPS receiver
operates synchronized with its internal time base. The FTI measurements are synchronized to an
IRIG-B time base. All time bases have their own random walk characteristic. To avoid C/A code
ambiguity, when its internal time base approaches ±1ms error from the GPS time, its clock is
then corrected causing time and phase observables discontinuities. A multiple time base
synchronization process was developed to correlate GPS and FTI data. The results are presented
and the residual errors were considered acceptable. These data allowed the determination of the
performance and accuracy of the GPS attitude determination algorithm. The tests profiles are
fully compliant with the Federal Aviation Administration (FAA) Advisory Circular (AC) 25-7A.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/604531 |
| Date | 10 1900 |
| Creators | Leite, Nelson Paiva Oliveira, Walter, Fernando |
| Contributors | CTA - Grupo Especial de Ensaios em Vôo, ITA - Divisão de Eletrônica |
| Publisher | International Foundation for Telemetering |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Proceedings |
| Rights | Copyright © held by the author; distribution rights International Foundation for Telemetering |
| Relation | http://www.telemetry.org/ |
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