Method of processing global navigation satellite system data

• US 9,200,902 B2
• Filed: 12/11/2009
• Issued: 12/01/2015
• Est. Priority Date: 12/11/2009
• Status: Active Grant

• Current Assignee: General Motors LLC (General Motors Company), GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: General Motors LLC (General Motors Company)
• Inventors: Madhavan, Sethu K., Basnayake, Chaminda, Huber, Chester A., Yasan, Eray
• Primary Examiner(s): Mawari, Redhwan k
• Assistant Examiner(s): King, Rodney P.
• Application Number:
  US12/636,248
• Publication Number:
  US 20110144911A1
• Time in Patent Office: 2,181 Days
• Field of Search: 701/208, 701/214, 342/357.13, 342/357.58
• US Class Current: 1/1
• CPC Class Codes: B64C 13/18 using automatic pilot
• CPC Class Codes: B64C 13/503 Fly-by-Wire
• CPC Class Codes: G01C 21/3896 Transmission of map data from central databases
• CPC Class Codes: G01S 19/08 providing integrity information, e.g. health of satellites or quality of ephemeris data
• CPC Class Codes: G01S 19/20 Integrity monitoring, fault detection or fault isolation of space segment
• CPC Class Codes: G01S 19/396 Determining accuracy or reliability of position or pseudorange measurements
• CPC Class Codes: G01S 19/42 Determining position

Abstract

A method of processing global navigation satellite system (GNSS) data includes identifying one or more GNSS satellites servicing a predefined area, receiving at least one of GNSS almanac data or space-based augmentation system (SBAS) data for the satellites servicing the predefined area, determining the performance of the GNSS satellites servicing the predefined area using the almanac data or SBAS data, and applying a performance rating to the predefined area based on the performance of the GNSS satellites.

Claims

1. A method of processing global navigation satellite system (GNSS) data, the steps comprising:

(a) identifying one or more GNSS satellites servicing a predefined area based on data received at a facility using a computer readable medium or at a vehicle telematics unit from the one or more GNSS satellites;

(b) receiving at the facility using a computer readable medium or a vehicle telematics unit at least one of GNSS almanac data or space-based augmentation system (SBAS) data for the satellites servicing the predefined area;

(c) determining at the facility using a computer readable medium the service quality of the GNSS satellites servicing the predefined area using the almanac data or SBAS data; and

(d) applying a performance rating to the predefined area based on the service quality of the GNSS satellites.

2. The method of claim 1, further comprising the step of defining the boundary of the predefined area by the number of GNSS satellites available within the predefined area.

3. The method of claim 1, wherein the predefined area further comprises three or more latitude and longitude coordinate pairs that define a polygonal-shaped area.

4. The method of claim 1, further comprising the step of receiving the GNSS almanac data or SBAS data at a vehicle and forwarding the data to a call center.

5. The method of claim 1, further comprising the step of sectioning the predefined area into a plurality of sections and applying the performance rating to each section.

6. The method of claim 1, further comprising the step of indicating the performance rating based on the number of GNSS satellites available at the predefined area.

7. The method of claim 1, further comprising the step of establishing a plurality of thresholds each representing a level of the performance rating.

8. The method of claim 7, wherein the thresholds further comprise an optimal threshold, a sub-optimal threshold, and a no-service threshold.

9. The method of claim 1, further comprising the step of identifying the performance rating on a map display.

10. A method of processing global navigation satellite system (GNSS) data, the steps comprising:

(a) identifying one or more GNSS satellites servicing a predefined area based on data received at a facility using a computer readable medium or at a vehicle telematics unit from the one or more GNSS satellites;

(b) receiving at the facility using a computer readable medium or from the vehicle telematics unit space-based augmentation system (SBAS) data that indicates the health of the servicing GNSS satellites;

(c) segmenting the predefined area into two or more sections at the facility using a computer readable medium;

(d) classifying each section with a performance rating at the facility using a computer readable medium based on the SBAS data; and

(e) displaying a map that depicts the sections and the predefined area.

11. The method of claim 10, further comprising the step of defining the boundary of the predefined area by the number of GNSS satellites available within the predefined area.

12. The method of claim 10, wherein the sections further comprise three or more latitude and longitude coordinate pairs that define a polygonal-shaped area.

13. The method of claim 10, further comprising the step of receiving the SBAS data at a vehicle and forwarding the data to a call center.

14. The method of claim 10, further comprising the step of establishing a plurality of thresholds each representing a performance rating.

15. The method of claim 14, wherein the thresholds further comprise an optimal threshold, a sub-optimal threshold, and a no-service threshold.

16. A method of processing global navigation satellite system (GNSS) data, the steps comprising:

(a) detecting one or more GNSS satellites available at a particular location based on data received at a facility using a computer readable medium or at a vehicle telematics unit from the one or more GNSS satellites;

(b) receiving space-based augmentation system (SBAS) data for the available GNSS satellites at a facility using a computer readable medium;

(c) determining the service quality of the available GNSS satellites at the facility using a computer readable medium using error data for the GNSS satellites included in the received SBAS data;

(d) classifying the location with a performance rating based on the determined service quality at a facility using a computer readable medium; and

(e) identifying the particular location on a map display using the performance rating.

17. The method of claim 16, further comprising the step of receiving the GNSS almanac data or SBAS data at a vehicle and forwarding the data to a call center.

18. The method of claim 16, further comprising the step of indicating the performance rating based on the number of GNSS satellites available at the predefined area.

19. The method of claim 16, further comprising the step of establishing a plurality of thresholds each representing a performance rating.

20. The method of claim 19, wherein the thresholds further comprise an optimal threshold, a sub-optimal threshold, and a no-service threshold.