------------------------------------------------------------------------ FILE: README AUTHOR: Ken Mankoff (mankoff (at) lasp (dot) colorado (dot) edu) LOCATION: LASP, University of Colorado DATE: 2002-05-28 WWW: http://lasp.colorado.edu/albatross/processing/ ------------------------------------------------------------------------ Introduction This document is the introductory documentation for the Mariner Mars 1971 Reflectance dataset. This dataset was produced in Spring, 2002 at LASP (Univ. of Colorado). People involved with this dataset are: Kenneth Mankoff Amanda Hendrix Karen Simmons Charles Barth Read the README.usage file for an explanation and examples on how to use the datasets and END USER software. Read the README.processing file for an explanation of the processing done on the data tapes to produce the reflectance science product. For visualization software: See http://lasp.colorado.edu/albatross/ For the processing routines / code / software: See http://lasp.colorado.edu/albatross/processing/ For the raw data: See http://lasp.colorado.edu/mariner_9_data/ Read the rest of this document (README) for general information on the files used, their purposes, and limitations ------------------------------------------------------------------------ File List This section lists each file in the directory and gives a brief description of the purpose. Sections below describe the steps taken in the processing from raw data through to a reflectance database. README This file README.usage How to use the data (end user) README.processing How to re-generate the data (developer) email.mapping Email listing DAS times of Mapping Sequences email.zenith Email listing Zenith DAS times by orbits mm71_calib_solar.dat data used for solar calib (wavelen, ozone, etc.) mm71_calib_solar.txt description of how above file was made mm71_setup.pro IDL .com commands to compile procedures mm71_files.pro Misc. useful functions for processing mm71 data mm71_reflectance.pro Pros to get from inst. DNs to reflectance mm71_reflectance_DAS.dat output of above 2 files. reflectance + DAS time nearest_DAS.pro used to go between EDR and SEDR files reflectanceDB.pro augments above .dat file with SEDR information reflectanceDB.dat output. Similar to mm71_reflectance_DAS.dat LUT_make.pro makes a LookUp Table from reflectanceDB.dat LUT_load.pro reads in and returns the LUT to the user LUT.dat the LUT. See LUT_load for struct format ------------------------------------------------------------------------ Notes & Warnings & Bugs & Etc. * EDR and SEDR files are not on the same DAS time scale. Right now the closest DAS time is used, but this leads to multiple EDR reflectance data getting assigned to the same SEDR times, and therefore having the *same* lat/lon, etc... * Even if interpolation is used as a solution to the above situation, I (KDM, May, 2002) discovered this: When the EDR and SEDR files do have the same DAS timestamps, they have different bookkeepping records (also called geometry, orbital parameters, etc.) (i.e. lat/lon, etc.). So, perfect re-creation of the satellite data seems impossible. Example: open the SEDR and EDR files. Find a record in each file that has the same DAS time. The lat/lon, reflectance, and other things at the SAME time will be different (by a fraction). * Rev 100 is approximately DAS 5000000 (5e7). This is the end of the dust storm * To re-process and change the database, you need to modify mm71_reflectance.pro. ex: Comment out the procedure call to mm71_reflectance_gainstate, and the few lines after it that to allow any gainstate. ex: Comment out the procedure call to mm71_reflectance_zenith to allow all orbits to be processed, not just zenith orbits. ------------------------------------------------------------------------ EOF