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Satellite image-based rheological map series

An original image-based approach to glacier rheological modelling and mapping from spaceborne repeat pass SAR interferograms and high-resolution IKONOS imagery was devised, programmed, tested and validated in different glacier environments.

The underlying concept, basic algorithms, processional singularities and the information contents of our value-added interferometric products were analysed and briefly discussed. The technological efficiency and reliability of a new mapping chain was proved by experiments on 14 ERS-1/2 spaceborne interferometric models and 6 stereoscopic models.

12 satellite image maps showing glacier dynamics in the Hintereisferner and Svartisen test sites were compiled, edited and printed at different scales ranging from 1:10 000 to 1:100 000. Map quality control was performed during special surveys in the field. The average tachometric accuracy of satellite rheological maps was estimated at, b 2.0cm/day. The relative accuracy of measuring glacier areal changes and planimetric estimations varied from 0.1 to 1.5%. The satellite rheological image map series provided the basic input to the OMEGA database.

Reported by

Joanneum Research Forschungsgesellschaft mbH
Wastiangasse 6
8010 Graz
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