User's real-time request for remote sensing data set

This data set uses stk to simulate the intelligent remote sensing satellite constellation composed of 1584 remote sensing satellites to generate the shooting content when each satellite passes through the observation area. The simulation time is 90 minutes. Because the satellite is in orbit to generate and process data, it takes a certain time, so the shooting content time is 10 seconds, the observation area is 20 ° - 40 ° N, 120 ° - 140 ° E square area, and the entire area is divided vertically and horizontally by 0.246914 °, Each grid area is about 600, with a total of 6561 grids.The satellite constellation parameters are: simulate the remote sensing satellite constellation composed of 1584 intelligent remote sensing satellites, the constellation model is Walker Delta constellation, 24 orbital planes, 66 low earth orbit satellites on each orbital plane, the orbital height is 550 km, the orbital inclination is 53 °, and the orbital eccentricity is 0. Each satellite carries a sensor, and the sensor's half-apex angle is set at 4 °, that is, the instantaneous coverage area is about 4700km^2.The satellite sensor coverage area generates a shooting area within the observation area, and each coverage area may cover multiple grids. In order to simplify the processing, the grid with the grid center point in the coverage area is considered to be in the coverage area, otherwise it is not considered to be in the shooting area. In addition, in one shot, the leftmost grid and the rightmost grid covered are used as the shooting area to calculate the longitude start point and end point of the shooting area, and the uppermost grid and the lowermost grid covered are used as the latitude start point and end point respectively to obtain the grid area generated in one shot. In the simulation scenario, every 10 seconds, each satellite passing over the observation area will generate a shooting content and transmit it to the ground TT&C station.The resolution of remote sensing images is divided into five resolution levels of 0.5 m, 0.75 m, 1 m, 2 m and 5 m with reference to the common resolution of long-light satellite. The resolution of the set shooting content is subject to uniform distribution on the interval [1,5], where 1~5 respectively represents the above five resolution levels.A total of 3 users are set up and interested remote sensing information is generated for each user. First, three grid points of interest are randomly generated for users, and then the longitude and latitude of the center point of the three grid points are taken as the mathematical expectation to generate a two-dimensional normal distribution area. As long as there are two grids in the content grid area in the user's area of interest, the content will be requested. At the same time, users 1 and 3 are immediately interested in an emergency in the area set as the center point in the 1000th observation area. For the resolution item, three users are set to be interested in remote sensing information with a resolution level of 1~3 with a probability of 0.8, 0.9 and 0.8 respectively, and in remote sensing information with a resolution level of 4~5 with a probability of 0.4, 0.5 and 0.4.Finally, according to the above data set generation method, a total of 7843 shooting contents are generated within 90 minutes of the simulation time, with 3 users in total, and a total of 23529 data sets are obtained, of which 2054 data should be recommended to users and 21475 data should not be recommended. The format of daily data is:<userid, resolution, time, lat_ start,lat_ end,lon_ start,lon_ End, label>represents user ID, resolution level, shooting time, latitude start point, latitude end point, longitude start point, longitude end point, and whether to recommend.