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Author: | Demirpolat, Caner |
Title: | X-band Interferometric Radar for Mapping Temporal Variability in Forest |
Publication type: | Master's thesis |
Publication year: | 2012 |
Pages: | xii + 86 Language: eng |
Department/School: | Radiotieteen ja -tekniikan laitos |
Main subject: | Avaruustekniikka (S-92) |
Supervisor: | Hallikainen, Martti |
Instructor: | Praks, Jaan |
Electronic version URL: | http://urn.fi/URN:NBN:fi:aalto-201302031394 |
OEVS: | Electronic archive copy is available via Aalto Thesis Database.
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Location: | P1 Ark Aalto 708 | Archive |
Keywords: | SAR forest SPC interferometry coherence penetration polarization |
Abstract (eng): | Valuation, management and monitoring forest sources are crucial in today's world economically and ecologically. Remote sensing provides the possibility to map the extent, state and spatial structure of the forest and to detect and monitor the changes at lower cost than conventional land surveys. Space-borne SAR has the advantage of acquiring images on a global scale in all weather conditions and independently of sunlight; therefore it has become a powerful tool in forestry applications. In this thesis, five sets of dual-polarimetric (HH/VV) TanDEM-X co-registered single-look slant-range products, acquired between September 4 and November 9, 2011, are processed. For each TanDEM-X/TerraSAR-X pair, the canopy height models (CHM) are derived from the interferometric coherence phase using the LIDAR Digital Terrain model as auxiliary data. Using the land cover CLC2006 data, temporal variations in coherence statistics, average SPC heights, penetration depths and relative location of SPC to treetop are mapped with respect to coniferous, deciduous and mixed forest classes. Results reveal that all parameters have certain dependencies on the forest class. Except coherence amplitude statistics, all parameters show sensitivity to the time of autumn and also to the SAR system polarization. Highest temporal variations are observed for deciduous forest, while coniferous forest seem to be least affected. Also, HH polarization is found to have stronger temporal variability than VV polarization for all forest classes. |
ED: | 2013-01-14 |
INSSI record number: 45811
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