Water body algae pollutant detecting method based on GNSS-R DDM

• Main Authors: LIU CHILI, CHEN NENGCHENG, YAN SONGHUA, BU FANGLING, CHEN ZEQIANG
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2018
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a water body algae pollutant detecting method based on GNSS-R DDM. The method comprises the steps of detecting water body algae by means of a peak value of DDM and a sea surface diffusion coefficient, wherein the step comprises acquiring a true DDM picture P1 and related satellite information through a GNSS-R receiver on an on-satellite receiving satellite; wherein the related satellite information comprises positions and speeds of a GNSS transmitting satellite and the on-satellite receiving satellite; according to the position and the speed of the GNSS transmitting satellite and the on-satellite receiving satellite, simulating a DDM picture P2 of a pure sea surface based on a diffusion coefficient of the sea surface; respectively normalizing the true DDMP1 and thesimulated DDMP2, calculating a normalization power difference for obtaining a difference DDM picture deltaP<->, performing binary determining processing, obtaining an area with the water body algae, and extracting the positio