| CPC G01S 7/40 (2013.01) [G01S 13/58 (2013.01)] | 2 Claims |
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1. An apparatus for correcting satellite observation data, comprising a mobile device, a microwave radiometer (MWR) on the mobile device, and a data processing center, wherein
the data processing center is connected to the MWR, and the data processing center is further connected to a target radiosonde station and a satellite observation station;
the mobile device is configured to drive the MWR to obtain MWR movement observation data at different second observation positions and different second observation time in a radiosonde observation limited sounding area;
the target radiosonde station is a radiosonde station nearest to the radiosonde observation limited sounding area; second observation positions of the target radiosonde station serve as first observation positions; second observation time of the target radiosonde station serves as first observation time; and the target radiosonde station is configured to acquire radiosonde observation data at the different first observation positions and the different first observation time; and
the data processing center is configured to perform the following steps:
constructing, based on large-sample observation data in an early checking stage at a first observation position and first observation time, a first error correction model for correcting movement observation data of a vehicle-mounted microwave radiometer (MWR), the large-sample observation data comprising observation data in the early checking stage of a radiosonde station at the first observation position and the first observation time and observation data in the early checking stage of the vehicle-mounted MWR, the first observation position being an observation position of the radiosonde station, and the first observation time being observation time of the radiosonde station; based on radiosonde observation data at 08:00 and 20:00, constructing a correlation model for dynamic observation data of the vehicle-mounted MWR and radiosonde station data;
correcting, based on the first error correction model, MWR movement observation data to obtain real-time corrected MWR movement observation data, the MWR movement observation data being observation data obtained by the MWR of a mobile device at different second observation positions and different second observation time on a moving path of the vehicle-mounted MWR in a radiosonde observation limited sounding area, a start and a destination of the MWR in an observation cycle each serving as the first observation position, the second observation positions each being determined based on a spatial resolution observed by the MWR, and the second observation time being determined based on a temporal resolution observed by the MWR;
allowing radiosonde observation data and the real-time corrected movement observation data of the vehicle-mounted MWR to form correction data, and matching the correction data with satellite observation data according to corresponding positions and time of vertical layers to obtain multiple sets of matched data for the vertical layers, the positions comprising the first observation position and the second observation position, and the time comprising the first observation time and the second observation time;
constructing, based on the multiple sets of matched data for the vertical layers, a second error correction model for correcting the satellite observation data; and
correcting, based on the second error correction model, observation data at third observation positions and different third observation time for the vertical layers on the moving path of the MWR to obtain corrected satellite observation data, the third observation positions each being determined based on a spatial resolution observed by a satellite, and the third observation time being determined based on a temporal resolution observed by the satellite;
wherein the constructing, based on the multiple sets of matched data for the vertical layers, a second error correction model for correcting the satellite observation data specifically comprises:
constructing a second to-be-trained model;
calculating a second observation data deviation in each set of the matched data, the second observation data deviation being a deviation between radiosonde observation data at the first observation position and the first observation time and satellite observation data observed by the satellite at the first observation position and the first observation time for each of the vertical layers, or a deviation between the corrected movement observation data of the vehicle-mounted MWR at the second observation position and the second observation time for the vertical layer and satellite observation data observed by the satellite at the second observation position and the second observation time for the vertical layer; and
fitting or iteratively training the second to-be-trained model based on the second observation data deviation to obtain the second error correction model;
wherein the mobile device is an unmanned ground vehicle (UGV).
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