Cloud base height estimation method for single-layer cloud facing flight vehicle navigation guidance

Abstract

The invention discloses a cloud base height estimation method for a single-layer cloud facing flight vehicle navigation guidance. The method comprises that the cloud layer is divided into cloud of different attributes according to data of different wavebands in an Aqua satellite; the number of cloud layers in Cloudsat and the cloud top temperature and optical thickness in Aqua are obtained from asatellite database; the Cloudsat satellite data matches Aqua satellite data in the same latitude and longitude; matched data is divided into a group of training data and a group of test data; a trained model is used to determine whether cloud of different attributes belong to the single-layer cloud; the cloud layer thickness of the single-layer low cloud is calculated by using a physical mathematical model, and a calculation result and data in the Cloudsat serve as parameters in a contrast adjustment model; a model in which a parameter is modified is used to calculate the cloud base height again; and the cloud base height can be obtained by subtracting the cloud layer height from the cloud top height. The cloud base height of the single layer cloud can be calculated, an algorithm is less complex, and the calculation range of the cloud base height is widened.

Description

technical field [0001] The invention relates to the field of interdisciplinary science and technology combining aircraft guidance and atmospheric sounding, and more particularly, relates to a method for estimating the height of monolayer cloud cloud base oriented to aircraft navigation and guidance. Background technique [0002] In the past, it was believed that as long as the automatic optical navigation and guidance system of the aircraft does not need human intervention in areas covered by clouds, it cannot perform image guidance on the area under the navigation guidance line, because it cannot obtain the image of the area. But as long as the clouds covering the detection area are medium clouds or high clouds, it will not have a big impact on the aircraft. Therefore, before the aircraft departs, it is necessary to obtain the information of the height of the cloud base in the navigation and guidance area to be headed. Using various meteorological cloud images and meteorol...

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Problems solved by technology

[0008] For the defects of the prior art, the purpose of the present invention is to solve the existing cloud base height calculation method, before calculating the cloud base height, it is assumed that the cloud in this area is a single-layer cloud, and there is no way to distinguish whether it is a single-layer cloud or a multi-layer cloud Steps, making the calculation error is relatively large technical problem

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