Method for utilizing forwarding range finding value and pseudo range value to determine GEO navigation satellite clock error

Abstract

The invention relates to a method for utilizing forwarding range finding value and pseudo range value to determine GEO navigation satellite clock error. The method comprises the following steps: obtaining GEO navigation satellite transponder time delay value, forwarding range finding value, pseudo range finding value and synchronization forwarding range finding value through laser measurement anddefinitive orbit calculation, converting the synchronization forwarding range finding value as original satellite ground distance value, and carrying out ionosphere correction on the original satellite ground distance value and the pseudo range finding value to respectively obtain ionosphere corrected satellite ground distance value and ionosphere corrected pseudo range measured value; figuring out real-time GEO navigation satellite clock error; and obtaining satellite transponder time-delayed actual value and after precise GEO navigation satellite clock error through after precision definitive orbit calculation. According to the method, clock error product with second time interval can be provided to improve real-time precision of a navigation positioning system. Also the calculating method used in the invention is simple, thus error in the calculating process is effectively minimized.

Description

technical field

[0001] The invention relates to a method for determining the clock error of an atomic clock on a GEO navigation satellite by using a forwarding distance measurement value and a pseudorange value, relates to the field of navigation satellite measurement and orbit determination, and belongs to the subject of astrometry and celestial mechanics. Background technique

[0002] The key problem of the positioning accuracy of the navigation satellite system is to determine the clock offset and its variation of the satellite-borne atomic clock.

[0003] At present, there are mainly three methods for determining the clock error of navigation satellites: 1) one-way ranging method, which uses the measured pseudorange value and the distance value between the satellite and the synchronous station obtained by orbit positioning, and the difference between the two can be obtained Satellite clock difference. 2) The two-way ranging method uses several radar measuring stations a...

Examples

Embodiment approach

[0041] Utilize the forwarding ranging equipment and GEO navigation satellites to generate forwarding ranging values, utilize the pseudo-range ranging equipment and GEO navigation satellites to generate pseudo-range values, and the data processing center and the software that runs the present invention to determine the clock difference of GEO navigation satellites are to the collected forwarding The ranging value and the pseudo-range value are processed to obtain the clock error of the navigation satellite. The specific steps are as follows:

[0042] Step 1: The performance of the ground station clock system is at least an order of magnitude higher than that of the spaceborne atomic clock, and it is used as a standard frequency source; the ground clock system provides a unified time and frequency signal for the forwarding ranging equipment and the pseudo-range ranging equipment. At this time, the forwarding ranging The forward ranging value collected by the device is only relate...

technical field

[0001] The invention relates to a method for determining the clock error of an atomic clock on a GEO navigation satellite by using a forwarding distance measurement value and a pseudorange value, relates to the field of navigation satellite measurement and orbit determination, and belongs to the subject of astrometry and celestial mechanics. Background technique

[0002] The key problem of the positioning accuracy of the navigation satellite system is to determine the clock offset and its variation of the satellite-borne atomic clock.

[0003] At present, there are mainly three methods for determining the clock error of navigation satellites: 1) one-way ranging method, which uses the measured pseudorange value and the distance value between the satellite and the synchronous station obtained by orbit positioning, and the difference between the two can be obtained Satellite clock difference. 2) The two-way ranging method uses several radar measuring stations a...

Examples

Embodiment approach

[0041] Utilize the forwarding ranging equipment and GEO navigation satellites to generate forwarding ranging values, utilize the pseudo-range ranging equipment and GEO navigation satellites to generate pseudo-range values, and the data processing center and the software that runs the present invention to determine the clock difference of GEO navigation satellites are to the collected forwarding The ranging value and the pseudo-range value are processed to obtain the clock error of the navigation satellite. The specific steps are as follows:

[0042] Step 1: The performance of the ground station clock system is at least an order of magnitude higher than that of the spaceborne atomic clock, and it is used as a standard frequency source; the ground clock system provides a unified time and frequency signal for the forwarding ranging equipment and the pseudo-range ranging equipment. At this time, the forwarding ranging The forward ranging value collected by the device is only relate...

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