RADARSAT-2 Winter Change & Track Detection Trial

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Authors
  1. Mattar, K.E.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
A series of RADARSAT-2 spotlight images and interferometric SAR pairs were collected over Ottawa in a winter change detection experiment. Despite the 44.6 mm of rain and 11 cm of snow that Ottawa received according to Environment Canada between January 6 and 30 some areas of the city maintained good coherence. Specifically two fields on either side of Timm Rd are considered. Even though the two fields have the same radar backscatter, they have very difference coherences. The field to the south of Timm Rd has good coherence while the one to the north has no coherence. Given their proximity, it is assumed that they both received the same amount of precipitation and have the same amount of snow accumulation. The key difference between them is on the ground. The field to the south has bare soil below the layer of snow. The field to the north has a layer of corn husks between the soil and the snow, with a few corn husks protruding above the snow. This is the key difference between the fields and must be the source of InSAR decorrelation. A second part of the experiment held at the end of January entailed detection of cross-country and snowshoe trails in snow. The tracks were created on January 26 when the air temperature hovered around 0° Celsius and the snow was soft. The tracks left deep impressions in the snow, which subsequently solidified overnight as air temperatures fell to -11° Celsius and remained below freezing for the duration of this part of the trial. The first RADA

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Report Number
DRDC-OTTAWA-TM-2010-184 — Technical Memorandum
Date of publication
01 Nov 2010
Number of Pages
46
DSTKIM No
CA034624
CANDIS No
534114
Format(s):
Electronic Document(PDF)

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