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Quasi-state dual-satellite positioning method and application thereof

A quasi-static, dual-satellite technology, applied in the field of satellite positioning, can solve problems such as effect discount and limited application range

Active Publication Date: 2014-04-09
XIAMEN YAXON NETWORKS CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, it cannot be used in the situation of only receiving two stars for a long time, the scope of use is limited, and the effect is greatly reduced

Method used

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  • Quasi-state dual-satellite positioning method and application thereof
  • Quasi-state dual-satellite positioning method and application thereof
  • Quasi-state dual-satellite positioning method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0105] Embodiment: quasi-static binary star positioning steps:

[0106] Step 1: Judging the number of satellite signals received at the current moment by the judging unit. If the number of signals is equal to 2, enter step 2. If the number of signals is greater than or equal to 4, enter the step of conventional positioning. If the number of signals is equal to 3, enter the step of triple-double satellite positioning.

[0107] Step 2: Query historical records from the spatio-temporal data recording module, sort by location time, and search from the record whose location time is closest to the current moment. If the GDOP value is less than 5.0, take out the longitude L in the record 0 , latitude B 0 Coordinate value and elevation value H 0 , if there is no record with GDOP value less than 5.0, take out the longitude L in the record with the smallest GDOP value 0 , latitude B 0 Coordinate value and elevation value H 0 . Use the coordinate transformation formula to convert t...

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Abstract

The invention relates to a quasi-state dual-satellite positioning method. A database is used for storing and refreshing conventional positioning spatio-temporal data; when the satellite signal loss phenomenon occurs, the adjacent spatio-temporal data can be searched to establish a precise earth ellipsoid equation to ensure the positioning precision; and because the adjacent spatio-temporal data are used as an iterative initial value, the resolving real-time performance is improved and the wrong positioning solution can be prevented. because Doppler frequency shift amounts are observed continuously, only two satellites are needed to realize real-time and precise positioning based on the positioning equation on the quasi-state condition. According to the invention, under the circumstances that the satellite signal loss phenomenon occurs and the GPS receiver only can receive two or three satellite signals temporarily, the real-time and precise positioning capability can be realized, wherein the error is maintained within ten meters. On the normal motion condition, the precise positioning within 20 minutes can be maintained by using a three-satellite positioning way; and on the quasi-state condition, the precise positioning over 20 minutes can be maintained by using the three-satellite or dual-satellite positioning way.

Description

technical field [0001] The present invention relates to the field of satellite positioning, more specifically, to a method for quasi-static dual-satellite positioning, and further provides a method for maintaining positioning performance when satellite signals are lost in passive positioning, and an implementation device. Background technique [0002] At present, ordinary GPS satellite GPS receivers need to receive at least four GPS satellite signals to perform accurate positioning. Once some satellite signals cannot be captured due to obstacles, electromagnetic interference, sunspot activity interference, etc., the GPS receiver When the number of received satellite signals is less than four, it will fail to locate. In this case, most current positioning devices switch to the base station positioning mode to maintain positioning performance, but the base station positioning error is very large, generally at the kilometer level, and accurate positioning cannot be achieved. T...

Claims

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Application Information

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IPC IPC(8): G01S19/42G01S19/03
CPCG01S19/42
Inventor 涂岩恺杨磊汤益明陈义华
Owner XIAMEN YAXON NETWORKS CO LTD
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