• Civil Aviation •     Next Articles

Accuracy and integrity of ground-based augmentation system based on GPS/BDS

NI Yude, LU Lu, LIU Ruihua   

  1. (College of Electronic Information & Automation, CAUC, Tianjin 300300, China)
  • Received:2017-01-22 Revised:2017-03-15 Online:2017-12-27 Published:2017-12-15

Abstract: The accuracy and integrity of GBAS (ground-based augmentation system)are two important indices to describethe RNP (required navigation performance)of GBAS. The Hatch carrier phase smoothing pseudorange algorithm for GBAS accuracy enhancement is analyzed and the integrity of GBAS in H0 and H1 hypotheses is studied. Based on GPSdata provided by US CoastGuard Navigation Center and real-time data of BDS (Beidou navigation satellite system), the simulation of GBAS accuracy and integrity enhancing algorithm are carried out. Experiment results show that the accuracy and integrity of GBAS based on GPS or BDS single constellation and GPS/BDS double constellations can meet the requirement of CAT I precision approach, and GBAS accuracy and integrity in double constellations environment are better than those of single constellation corresponding performance.

Key words: GBAS, accuracy, integrit, GPS, BDS

CLC Number: