[About the data type of the CRISM I/F images]

Respected Sir/Madam

 

I am Mtech student in RS GIS and working on the CRISM data for my major project. I want MTRDR data for this project for the year of 2020  but the data updated in the PDS Geosciences Node is till the  May 21, 2012.

 

So can you please update  me about when the directory will get updated with the latest MTRDR data and can you please guide me regarding the processing for getting it out from the raw EDR data. I will be thankful to you.

[About the data type of the CRISM I/F images]

On 6/28/2021 at 8:51 PM, Ray Arvidson said:

Hi There: I am the Geosciences Node Manager and also a CRISM Science Team Member. I can answer your questions. I/F is defined as the radiance on sensor divided by the solar radiance at the top of the atmosphere that would have occurred during the observation. The TRDRs are presented with these units. It is a form of reflectance but one that has the atmosphere and surface terms included. The Viviano-Beck spectral parameters operate on these data sets. They do not operate on he MTRDRs, which have been processed to remove atmospheric effects and normalized to surface reflectance, with S and L bands joined. This document explains the processing and is a must for reading if you wish to use CRISM data: https://pds-geosciences.wustl.edu/mro/mro-m-crism-2-edr-v1/mrocr_0001/document/crism_dpsis.pdf

Ray Arvidson

 

[About the data type of the CRISM I/F images]

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