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Beam-capturing scanning method for rapidly establishing laser link between relay satellite and user satellite

A technology for user satellites and relay satellites, applied in the field of inter-satellite beam capture and scanning, it can solve the problems of long capture time, and achieve the effects of increasing data transmission capability, shortening the time interval between skip scans, and improving effective communication time.

Inactive Publication Date: 2009-10-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the problem of long acquisition time of the existing relay satellite to user satellite acquisition method, thereby proposing a beam capture scanning method for quickly establishing a laser link between the relay satellite and the user satellite

Method used

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  • Beam-capturing scanning method for rapidly establishing laser link between relay satellite and user satellite
  • Beam-capturing scanning method for rapidly establishing laser link between relay satellite and user satellite
  • Beam-capturing scanning method for rapidly establishing laser link between relay satellite and user satellite

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine figure 1 Illustrate this specific implementation mode, the light beam capturing and scanning method that quickly establishes the laser link between the relay star and the user star, its steps are:

[0013] Step 1: The relay star terminal sends a beacon beam to a scanning point in the area to be scanned;

[0014] Step 2: The relay star terminal sends a beacon beam to the next scanning point in the area to be scanned according to the time interval;

[0015] Step 3: When the beacon beam described in step 1 or step 2 reaches the scanning point in the area to be scanned, the user star terminal sends out a return beam;

[0016] Step 4: The relay star terminal judges whether it has received the return light beam described in step 3, if the judgment result is no, go to step 2; if the judgment result is yes, the relay star terminal stops sending out the beacon beam, at this time , the user star is located at the previous scanning point...

specific Embodiment approach 2

[0019] Specific embodiment 2: The difference between this specific embodiment and specific embodiment 1 is that the difference between the beam capturing and scanning method for quickly establishing the laser link between the relay star and the user star is that the field of view angle of the relay star terminal The size is between -4mrad and 4mrad.

specific Embodiment approach 3

[0020] Specific Embodiment 3: The difference between this specific embodiment and the beam capture scanning method for quickly establishing the laser link between the relay star and the user star described in the specific embodiment 1 or 2 is that the delay time of the light transmission back to the user star is 0.15 s; in step 2, the time interval for the relay star terminal to send out the skip-sweep beam is 0.2s.

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Abstract

A beam acquisition scanning method for rapidly establishing laser link between a relay satellite and a user satellite relates to a beam acquisition scanning method between satellites. The invention solves the problem that the acquisition time is long in the existing acquisition method of the relay satellite against the user satellite. The method comprises the following steps: step 1. a terminal of the relay satellite gives out a beacon light beam to a scanning spot of a region to be scanned; step 2. the terminal of the relay satellite gives out a beacon light beam to a next scanning point of the region to be scanned according to time intervals; step 3. when the beacon light beam of step 1 or 2 reaches the region to be scanned, a terminal of the user satellite gives out a return light beam simultaneously; and step 4. the terminal of the relay satellite judges whether the return light beam of step 3 is received or not, if not, step 2 is executed again; if so, the terminal of the relay satellite stops giving out the beacon light beam, and the user satellite is at a previous scanning point and the acquisition of the relay satellite against the user satellite is successful. The method is applicable to the process of rapidly establishing a laser link between the relay satellite and the user satellite.

Description

technical field [0001] The invention relates to an interstellar light beam capturing and scanning method. Background technique [0002] The inter-satellite laser link is mainly established through the capture and scanning of the link terminal, and the main technical indicators include capture probability and capture time. It is generally required that the capture time be as short as possible under the condition that a certain capture probability requirement is met. Since the transmission distance between the relay satellite and the user satellite (GEO-LEO) is relatively long (about 45,000km), the influence of the optical signal transmission time (delay, one-way transmission delay of about 0.15s) on the acquisition time during the acquisition scan larger. The existing scan acquisition method is: GEO terminal sends out beacon light signal, which is transmitted to the range where LEO terminal may exist (defined as the acquisition uncertain angle). Since the divergence angle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/00H04B7/185H04B10/118
Inventor 马晶谭立英于思源武凤赵芳
Owner HARBIN INST OF TECH