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

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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