We did a short day trip to Kleine Scheidegg (on the way to Jungfraujoch) to see how well we can measure the flow of hanging ice with a ground based radar interferometer. This is a nice instrument, built by Gamma Remote Sensing that can measure displacements as small as a few millimeters. In the case of Eigergletscher it took a few hours to get sufficient displacements.
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| The radar, ready to go. |
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| Eigergletscher |
And here is Eigergletscher as seen by the radar. The picture shows an interferogram taken from two images separated by several hours. The colored fringes near the center correspond to 8 mm of motion for one color cycle. Since we can count about three cycles, that corresponds to 24 mm of displacement.
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