Satellite-borne cloud detection radar echo simulation and echo characteristic parameter precision estimation method

Abstract

The invention discloses a satellite-borne cloud measurement radar echo simulation and echo characteristic parameter precision estimation method; and the method comprises the steps: obtaining noise-containing satellite-borne cloud measurement radar echo simulation data through distance library weighting, antenna weighting and speed parameter correction according to the actual observation data of acloud measurement radar and the observation of a satellite-borne platform and the distribution and noise characteristics of a cloud target; and the requirements of cloud target echo characteristic parameter estimation precision evaluation under different satellite-borne conditions are met. The method is closer to the actual system working condition, can more accurately consider the evaluation of the target distribution, satellite motion and the like on the estimation precision of the meteorological target characteristic parameters of the satellite-borne platform, and achieves the purpose of extracting the echo characteristic parameters of the cloud target of the satellite-borne platform.

Description

technical field [0001] The invention relates to the field of active microwave atmospheric detection, in particular to a method for simulating echoes of space-borne cloud-measuring radars and estimating the accuracy of echo characteristic parameters. Background technique [0002] Clouds are an important part of the earth-atmosphere system (water cycle, regulation of the Earth's energy radiation budget), an important factor affecting weather and climate change, and the largest source of uncertainty in current weather forecasts and climate change. The fifth report of the United Nations Intergovernmental Panel on Climate Change (IPCC) pointed out that among the components of total radiative forcing, cloud radiative forcing has the greatest uncertainty and is the largest source of uncertainty in climate change. At present, there is room for improvement in the detection sensitivity of space-borne cloud measuring radar, and there is a great application demand in high-precision velo...

AI Technical Summary

Problems solved by technology

At present, the pulse Doppler system echo spectrum characteristic model has been established in the field of meteorological radar, and the in-phase and orthogonal sampling data are generated based on most echoes obeying the Gaussian model, which lays the foundation for meteorological echo simulation, but few based on actual ground or The method of constructing the spaceborne state echo model and the accuracy estimation of the corresponding echo characteristic parameters based on the airborne observation data

Images