I want to use aster L1T for Crop Identification. ASTER L1T contains terrain correction, rediometric and geometric correction. I want to know whether it needs atmospheric correction or not?
atmospheric correction will required if you are you using temporal data sets..............L1T data products you can see from white paper of ASTER DATA PRODUCTS......WHAT CORRECTIONS ARE DONE.............
Hi. Check this link I provided. Once you are on the page, go down to the very end and then click "Links." There you will find all the helpful tips you need.
Cheers!
https://lpdaac.usgs.gov/dataset_discovery/aster/aster_products_table/ast_l1t
Geometric and radiometric correction are required as mentioned in the paper.
Article ASTER Level-1 data processing algorithm
Cross-talk and geometric corrections are applied on ASTER L1T data. But the digital numbers are still radiance at sensor and not reflectance on ground. So, if you want to convert radiance at sensor to reflectance on ground, you have to do atmospheric correction.
R and Python scripts that can be used to Convert ASTER L1T Radiance to Top of Atmosphere Reflectance:
https://lpdaac.usgs.gov/user_community/user_resources/e_learning/how_convert_aster_l1t_radiance_top_atmosphere_reflectance
Hi Shena... I think that you need to apply correction for cross talk effect in SWIR bands, then convert Digital Numbers towards radiance, and last step is apply atmospheric correction for find reflectance relative in the ground.
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