METHOD OF SATELLITE STATUS JUDGMENT

• US 20120056783A1
• Filed: 09/06/2011
• Published: 03/08/2012
• Est. Priority Date: 09/08/2010
• Status: Active Grant

• Current Assignee: Getac Technology Company Limited (MiTAC Holdings Corp.)
• Original Assignee: Getac Technology Company Limited (MiTAC Holdings Corp.)
• Inventors: Chiu, Shang-Ming
• Granted Patent: US 9,529,090 B2
• Time in Patent Office: Days
• US Class Current: 342/357.67
• CPC Class Codes: G01S 19/21 Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
• CPC Class Codes: G01S 19/28 Satellite selection

Abstract

A method of satellite status judgment and computer program applying the same is disclosed. The method includes steps of obtaining a signal variation slope of a first signal of a target satellite during a first observation time period, determining whether the target satellite is under a situation of being masked according to the slope of the first signal, and generating a prompt message when the target satellite is under the situation of being masked.

Claims

1. A method of satellite status judgment, the method comprising steps of:

obtaining a variation slope of a first signal of a target satellite at a first observation time period;

determining whether the target satellite is under a situation of being masked according to the variation slope of the first signal; and

generating a prompt message when the target satellite is under the situation of being masked.

2. The method of satellite status judgment as recited in claim 1, further comprising steps of:

selecting a plurality of observation satellites from a plurality of satellites according to a first condition;

selecting the target satellite in turn from the observation satellites.

3. The method of satellite status judgment as recited in claim 2, wherein the first condition includes that an elevation angle of the satellite is from 0 to 90 degrees.

4. The method of satellite status judgment as recited in claim 2, wherein the first condition includes that carrier-to noise ratio (CNR) of the satellite signals is at the range of 12-52 dB.

5. The method of satellite status judgment as recited in claim 4, wherein the variation slope of the first signal of the target satellite is determined according to the carrier-to-noise ratio, and the target satellite is under a situation of being masked when the variation slope of the first signal is less than a predetermined threshold value.

6. The method of satellite status judgment as recited in claim 1, further masking positioning signals transmitted from the target satellite according to the prompt message.

7. The method of satellite status judgment as recited in claim 1, further generating a prompt message of error according to said prompt message.

8. The method of satellite status judgment as recited in claim 1, wherein the step of determining whether the target satellite is under a situation of being masked further comprising:

determining whether the variation slope of the first signal is deteriorated; and

deciding that the target satellite is under the situation of being masked, according to deterioration of the variation slope of the first signal.

9. The method of satellite status judgment as recited in claim 1, further comprising steps of:

obtaining a variation slope of a second signal of the target satellite at a second observation time period; and

determining whether the variation slope of the second signal is optimalized and whether the target satellite is out of the situation of being masked.

10. The method of satellite status judgment as recited in claim 1, further comprising step of providing the prompt message to a front end processing module or a rear end processing module.

11. The method of satellite status judgment as recited in claim 10, wherein the front end processing module is a positioning signal providing unit and the rear end processing module is a apply software.

12. A computer program storing a software program, wherein when the software is implemented, an electronic apparatus performs a method of satellite status judgment, the method comprising steps of:

obtaining a variation slope of a first signal of a target satellite at a first observation time period;

determining whether the target satellite is under a situation of being masked according to the variation slope of the first signal; and

generating a prompt message when the target satellite is under the situation of being masked.

13. The computer program as recited in claim 12, further comprising steps of:

selecting a plurality of observation satellites from a plurality of satellites according to a first condition;

selecting the target satellite in turn from the observation satellites.

14. The computer program as recited in claim 13, wherein the first condition includes that an elevation angle of the satellite is from 0 to 90 degrees.

15. The computer program as recited in claim 13, wherein the first condition includes that carrier-to noise ratio (CNR) of the satellite signals is at the range of 12-52 dB.

16. The computer program as recited in claim 15, wherein the variation slope of the first signal of the target satellite is determined according to the carrier-to-noise ratio, and the target satellite is under a situation of being masked when the variation slope of the first signal is less than a predetermined threshold value.

17. The computer program as recited in claim 12, further masking positioning signals transmitted from the target satellite according to the prompt message.

18. The computer program as recited in claim 12, further generating a prompt message of error according to said prompt message.

19. The computer program as recited in claim 12, wherein the step of determining whether the target satellite is under a situation of being masked further comprising:

determining whether the variation slope of the first signal is deteriorated; and

deciding that the target satellite is under the situation of being masked, according to deterioration of the variation slope of the first signal.

20. The computer program as recited in claim 12, further comprising steps of:

obtaining a variation slope of a second signal of the target satellite at a second observation time period; and

determining whether the variation slope of the second signal is optimalized and whether the target satellite is out of the situation of being masked.