Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-24T02:30:08.718Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effect of Terrain Mask on RAIM Availability

Published online by Cambridge University Press:  01 December 2009

Tomislav Radišić ,
Doris Novak  and
Tino Bucak
Tomislav Radišić*
Affiliation:
(University of Zagreb, Croatia)
Doris Novak
Affiliation:
(University of Zagreb, Croatia)
Tino Bucak
Affiliation:
(University of Zagreb, Croatia)
*
(Email:[email protected])
Get access Rights & Permissions [Opens in a new window]

Abstract

Receiver Autonomous Integrity Monitoring (RAIM) is a method, used by an aircraft's receiver, for detecting and isolating faulty satellites of the Global Navigation Satellite System (GNSS). In order for a receiver to be able to detect and isolate a faulty satellite using a RAIM algorithm, a couple of conditions must be met: a minimum number of satellites, and an adequate satellite geometry. Due to the highly predictable orbits of the GPS satellites, a RAIM availability prediction can be done easily. A number of RAIM methods exist; however, none of them takes into account the precise terrain masking of the satellites for the specific location. They consider a uniform fixed mask angle over the whole horizon. This paper will introduce the variable mask RAIM algorithm in order to show to what extent the terrain can affect the RAIM availability and how much it differs from the conventional algorithms.

Keywords

RAIMAvailability predictionTerrain maskDEM
Type
Research Article
Information
The Journal of Navigation , Volume 63 , Issue 1 , January 2010 , pp. 105 - 117
Copyright
Copyright © The Royal Institute of Navigation 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Brown, R. G. (1992). A Baseline GPS RAIM Scheme and a Note on the Equivalence of Three RAIM Methods, Navigation: Journal of the Institute of Navigation, Volume 39, 3, Fall 1992, 101–116.CrossRefGoogle Scholar
Chin, G. Y., Kraemer, J. H. and Brown, R. G., (1996). GPS RAIM: Screening Out Bad Geometries under Worst – Case Bias Conditions. Global Positioning System: theory and applications Volume 2, eds. Parkinson, B.W. and Spilker, J.J. Jr., American Institute of Aeronautics and Astronautics.Google Scholar
European Aviation Safety Agency (EASA), (2003.) General Acceptable Means of Compliance for Airworthiness of Products, Parts and Appliances (AMC-20), Brussels.Google Scholar
Kaplan, E. D. (1996). Performance of Stand Alone GPS. Understanding GPS: Principles and Applications, Artech House IncGoogle Scholar
Parkinson, B. W. & Spilker, J. J. (1996), Global Positioning System: Theory and Applications, Volume II, AIAA, Progress in Astronautics and AeronauticsCrossRefGoogle Scholar
Sandstrom, H (2001), GPS RAIM and Measurement Signal Analysis in Personal Positioning, MSc Thesis, Tampere University of Technology, Department of Information Technology.Google Scholar