Positioning method for intermediate orbit satellite search and rescue system

A technology of orbit satellite and positioning method, which is applied in the field of satellite search and rescue system positioning, and can solve the problems that low-orbit search and rescue systems cannot locate and position in real time

Active Publication Date: 2011-06-08
SPACE STAR TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention solves the problem that the low-orbit search and rescu

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  • Positioning method for intermediate orbit satellite search and rescue system
  • Positioning method for intermediate orbit satellite search and rescue system
  • Positioning method for intermediate orbit satellite search and rescue system

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Embodiment Construction

[0032] A comprehensive positioning method for a mid-orbit search and rescue system according to the invention is used for positioning a distress beacon.

[0033] 1. Principle introduction

[0034] When a ship, vehicle, or aircraft equipped with a beacon is in distress, the trigger device can be used to activate the launch of the beacon (for example, the navigation beacon on the ship will automatically trigger when it is subjected to a certain water pressure). International search and rescue organizations have agreed on a frequency for search and rescue beacons, namely 406MHz. The beacon signal is uplinked to the medium-orbit satellite. The satellite platform is equipped with a transponder for the beacon signal, which converts the frequency of the search and rescue signal to a radio frequency (L-band or S-band). After the frequency band, it is transmitted from the downlink channel to the ground receiving station.

[0035] Aiming at the characteristics of the search and rescue ...

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Abstract

The invention relates to a positioning method for an intermediate orbit satellite search and rescue system. The method comprises the following steps of: carrying out time and frequency joint positioning processing on a beacon by utilizing search and rescue signals forwarded by multiple satellites to position the beacon; and then carrying out continuous burst processing by utilizing a search and rescue signal sent in a beacon lasting period to realize the persistent improvement of a beacon positioning result. The method is suitable for the intermediate orbit satellite search and rescue system and has the characteristics of short positioning time and high positioning precision.

Description

technical field [0001] The invention relates to a positioning method for a satellite search and rescue system, in particular to a positioning method for a mid-orbit satellite search and rescue system. Background technique [0002] At present, the satellite search and rescue system applied to the 406MHz distress beacon is a low-orbit satellite search and rescue system. The main positioning principle is to use the Doppler frequency of the search and rescue beacon measured by a single low-orbit satellite at different positions, and combine the positioning equation to obtain Beacon location. Typically, solving an equation results in two solutions, the actual solution and the mirrored solution. Through the prior test method, the mirror image solution is screened out with a higher probability, and the real solution is obtained. [0003] The disadvantage of low-orbit search and rescue systems is the long positioning reaction time due to the need to measure Doppler frequencies at ...

Claims

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Application Information

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IPC IPC(8): G01S19/42
Inventor 刘绍波林墨张云杰
Owner SPACE STAR TECH CO LTD
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