1 “...Satellite radar altimetry, as one of the basic space measurement techniques intended primarily...”

2 Subjects: “...international space station...”

3 Subjects: “...satellite altimetry...”

4 Subjects: “...free satellite imagery...”

5 Subjects: “...satellite-derived bathymetry...”

6 Subjects: “...space-time covariance model...”

7 Subjects: “...urban open space...”

8 “... contact with the objects. Aircraft, satellites ...etc are the major platforms for remote sensing...”