GPS Receiver Autonomous Integrity Monitoring
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields

Dates

to

Document Data
Library
People
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

GPS Receiver Autonomous Integrity Monitoring

Filetype[PDF-8.48 MB]


Select the Download button to view the document
This document is over 5mb in size and cannot be previewed
English
Details You May Also Like

Details:

  • Creators:
  • Corporate Creators:
    Iowa State University
  • Corporate Contributors:
    Transportation Systems Center
  • Subject/TRT Terms:
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Edition:
    Final report
  • Corporate Publisher:
    Transportation Systems Center
  • Abstract:
    The Global Positioning System (GPS) is a new satellite navigation system that is being deployed by the Department of Defense. When completed in the early 1990s, there will be 24 satellites in orbit, each having a period of 12 hours. The system will then provide worldwide coverage, 24 hours a day. There is a civil as well as military side to GPS, and the civil community has shown much interest in the use of this system for a wide variety of applications on land, sea, and air. One of the main concerns, however, of the civil community has to do with the system integrity. The term integrity, as used here, simply refers to the ability of the system to provide timely warnings to the user when the system should not be used for navigation. This report reviews recent research work on providing GPS integrity with self-contained means, i.e., using methods that take advantage of redundant GPS measurements within the GPS receiver and without reference to outside information. This approach to GPS integrity is frequently referred to as Receiver Autonomous Integrity Monitoring (RAIM). In addition to reviewing prior efforts with RAIM, this report presents a new method of RAIM that uses a combination of chi-square statistics and Kalman filtering methods. The authors conclude that RAIM can provide effective system integrity when the satellite geometry is favorable. However, there will be occasional short intervals of a few minutes when the satellite geometry does not provide the necessary redundancy for good integrity verification. • These intervals of bad geometry are predictable, however, so it simply means that the user who is entirely dependent on RAIM will have to avoid certain regimes of flight, such as the nonprecision approach, during these brief intervals. An alternative to this would be to aid RAIM with outside information from such sources as Loran-C or barometric altitude.
  • Format:
    PDF
  • Funding:
    DTRS-57-85-C-00089
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files
More +

You May Also Like

Checkout today's featured content at rosap.ntl.bts.gov