To this end the visibility of each
transponder for each swath
has been calculated based initially on a 1km x 1km grid
covering the Netherlands. For each point the maximum
number of overall transponder acquisitions and the
maximum number of acquisitions per swath was calculated.
The results for the locations where a minimum of 24
acquisitions are possible with a minimum of three per swath
for one 35-day orbital cycle are presented in figure 8. This
already gives an idea of the sites which would provide the
most optimal use of the transponders. Further consideration
must also be given to the 36km swath of External
Characterization mode and, of course, ground suitability of a
selected area. At the time of writing the definitive sites were
about to be selected.
Validation of the calibration performance will be supported
by the four RADARSAT transponders deployed over a
latitude range from 45-74
o
in Canada [3]. As RADARSAT
operates at 5.3 GHz, the actual RCS of these transponders at
5.331 GHz needs to be characterized.
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