|IS THE MAIZE GROWING WELL ?
Monitoring crop development by remote sensing
requires the acquisition of good-quality images that cannot be provided
by optical satellites, given the high degree of cloud cover that
characterises our country. However, wavelengths used for radar are
insensitive to such atmospheric disturbances. Radar sensors can
thus collect data regardless of the cloud cover. Those who are interested
in monitoring fields over a growing season can thus count systematically
on a score of radar images.
Colour composite image acquired on 13 and 14 June 1996
( Red: interferometric coherence between the two images,
Green: average intensity for the two images, Blue: intensity
difference between the two images.
The projects aim is to develop agricultural
applications using images derived from interferometric pairs. Two
specific aims have been achieved so far, namely:
- to analyse the relationship between
interferometric coherence and crop variables such as the vegetations
height and rate of ground coverage for the four most widespread
crops in the study area, that is, wheat, sugar beets, maize, and
- to explore coherences contribution
to crop classification.