Method for automatically judging mud throwing times based on satellite positioning data

The invention discloses a method for automatically judging mud throwing times based on satellite positioning data, which comprises the following steps of: 1, setting a dredging construction area and a mud throwing area, and carrying out gridding processing on the mud throwing area; 2, an AIS system is arranged on the sand dredger, sand dredger information transmitted by the AIS system is read in real time, and the sand dredger information transmitted by the AIS system comprises a sand dredger identification number and satellite positioning data; 3, the satellite positioning data obtained in real time and the corresponding area mark number of the sand dredger are obtained; 4, acquiring continuous three times of satellite positioning data s1, s2 and s3 output by the AIS system, and calculating azimuth angles b1 and b2 between two adjacent coordinates; 5, calculating a difference value between the b1 and the b2, and taking an absolute value theta of the difference value; 6, if theta meets the condition, the area