COHERENT CHANGE DETECTION (CCD)
A TECHNIQUE INVOLVING THE COLLECTION AND COMPARISON OF A PAIR OF COHERENT SYNTHETIC APERTURE RADAR (SAR) IMAGES FROM APPROXIMATELY THE SAME GEOMETRY COLLECTED AT TWO DIFFERENT TIMES (BEFORE AND AFTER AN EVENT).
THE RESULT OF THIS COMPARISON IS TO REVEAL MINOR CHANGES IN THE IMAGED AREA SUCH AS THOSE CAUSED BY:
- VEHICULAR MOVEMENT (TIRE TRACKS, TANK TRACKS, ETC.)
- MINE OR BARRIER EMPLACEMENT
- USE OF REMOTE AREAS (DRUG PRODUCTION/MANUFACTURING)