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Mid-and-low-latitude region target non-along-track strip dividing and observing method

A technology of regional targets and strips, applied in the field of satellite observation, can solve problems such as short observation completion time

Active Publication Date: 2016-09-21
NAT UNIV OF DEFENSE TECH
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to propose a rotation division method of angle step to divide the area target into non-track strips, so as to solve how to use shorter observation completion time and smaller observation time in active push-broom imaging mode Imaging of regional targets by satellite attitude maneuver range

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  • Mid-and-low-latitude region target non-along-track strip dividing and observing method
  • Mid-and-low-latitude region target non-along-track strip dividing and observing method
  • Mid-and-low-latitude region target non-along-track strip dividing and observing method

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Embodiment Construction

[0069] The present invention uses C# language programming for verification and analysis. Because the division in a multi-track lap is the same as the division of a regional target in a single lap, a regional target is divided in a single lap below. The division uses the following parameter information .

[0070] Table 1 Satellite orbit element number table

[0071]

[0072] Table 2 Satellite Capability Table

[0073]

[0074] Table 3 Partition parameter table

[0075]

[0076] Table 4 Regional target information

[0077] Vertex

Latitude / (°)

Longitude / (°)

Height / (km)

1

50.761

-23.214

0

2

50.236

-22.209

0

3

49.918

-22.280

0

4

49.949

-24.040

0

[0078] figure 2 It is the system flow chart of the present invention, and the regional targets are divided according to the performance parameters of the satellites. Step 1: Obtain regional target information, satellite orbit information, satellite capability information, and division period information. Step 2: According to the sate...

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Abstract

The invention aims to solve the technical problem of providing an angle stepping rotary dividing method for carrying out non-along-track strip division on a region target so as to solve the problem of high cost of observing the region target in an initiative push-scanning imaging manner. The invention adopts the technical scheme that initial information is acquired; visibility calculation is carried out on an observed target; a datum division scheme is determined; and the angle stepping rotary dividing method is adopted to carry out screening of division schemes and feasibility verifying. The angle stepping rotary dividing method has the beneficial effects that by adopting the non-along-track strip dividing method, a division direction is optimized, and the number of strips for dividing the same region target is reduced, so that observing time is reduced; by adopting a strip overlapping ratio, an offset error caused by on-orbit satellite attitude control can be avoided; optimization is carried out by adopting an observing sequence next to reciprocating push-scanning, so that attitude maneuver time and an attitude maneuver amplitude among strips are reduced; optimization of the observing time reduces an attitude maneuver amplitude of the push-scanning process; feasibility testing on the observing scheme ensures feasibility of the observing scheme.

Description

Technical field [0001] The invention relates to the technical field of satellite observations, in particular to a method for dividing and observing regional target non-along track strips used for satellite observation in middle and low latitudes. Background technique [0002] The mission of an earth observation satellite is usually to obtain image information of a target in a designated area on the earth's surface according to the user's observation needs. However, for regional targets, due to the limited width of satellite cameras, satellites cannot achieve coverage with a single imaging for large-area regional targets. Therefore, large-area targets must be reasonably divided and imaged multiple times in succession. How to divide the regional target and determine the appropriate observation plan to minimize the observation cost is the key point of the present invention. The observation plan here mainly refers to the strip observation sequence and the target start observation tim...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 杨文沅贺仁杰杨振宇刘晓路耿西英智龚洪涛闫俊刚
Owner NAT UNIV OF DEFENSE TECH
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