Aster 1A - radiometric corrections - DEM Extraction

Prev Go to previous topic

Go to next topic

Last Post 01 Mar 2010 01:33 AM by anon

1 Replies

Sort:


You are not authorized to post a reply.

Author

Messages

anon

New Member

Posts:

01 Mar 2010 01:33 AM
Hi I am attempting to extract a 15m DEM from a stereo imagery (ASTER 1A). The process runs perfectly well on the raw imagery. But the result obtained is a relative DEM with almost all the elevation values - no GCPs (so no Z-calibrations) but the GCPs are currently collected on the field - I read that ASTER 1A need a radiometric correction before attempting any calculations. But unfortunatly, I have no ideas how to manage these corrections. So I ask if anyone knows how to manage that, could you please tell me the steps I have to follow? best regards F.R.

MariM

Veteran Member

Posts:2396
Veteran Member

03 Mar 2010 07:41 AM
The scale factors to convert the DN to floating point radiance are applied to ASTER and MODIS data when the file is opened. This is a setting in the ENVI preferences under the Miscellaneous tab called 'Auto-Correct ASTER/MODIS'. Your ASTER 1A data should already be in the format required for DEM Extraction.

You are not authorized to post a reply.