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2001 Mars Odyssey: GRS AHD

Jan. 24, 2024. Release 86 includes new Averaged HEND Data (AHD) acquired between April 2, 2023 and July 13, 2023.

GRS Averaged HEND Data (AHD) products are organized as a single virtual volume. Each data file represents a time period of 15 degrees of solar longitude (Ls). Each record in the file corresponds to a 5x5 degree latitude-longitude bin. Data subdirectories are grouped into directories by mission year.

Use the links below for direct HTTP access to any part of the GRS AHD archive. Alternatively, to search the archive for data that meet particular criteria, e.g. time and location, use the Mars Orbital Data Explorer (ODE).

AAREADME.TXT Introduction to the archive
ERRATA.TXT Notes and errata for this release
YR12 directory Data products acquired during Odyssey mapping year 12
(Ls 0 - 90, 12/27/22 - 7/13/23)
YR11 directory Data products acquired during Odyssey mapping year 11
(Ls 0 - 360, 2/8/21 - 12/27/22)
YR10 directory Data products acquired during Odyssey mapping year 10
(Ls 15 - 360, 4/24/19 - 2/8/21)
YR09 directory Data products acquired during Odyssey mapping year 9
(Ls 0 - 360, 5/6/17 - 3/24/19)
YR08 directory Data products acquired during Odyssey mapping year 8
(Ls 0 - 360, 6/19/15 - 5/6/17)
YR07 directory Data products acquired during Odyssey mapping year 7
(Ls 0 - 360, 8/1/13 - 6/12/15)
YR06 directory Data products acquired during Odyssey mapping year 6
(Ls 0 - 360, 9/14/11 - 8/1/13)
YR05 directory Data products acquired during Odyssey mapping year 5
(Ls 0 - 360, 10/27/09 - 9/14/11)
YR04 directory Data products acquired during Odyssey mapping year 4
(Ls 0 - 360, 12/10/07 - 10/27/09)
YR03 directory Data products acquired during Odyssey mapping year 3
(Ls 0 - 360, 1/22/06 - 12/10/07)
YR02 directory Data products acquired during Odyssey mapping year 2
(Ls 0 - 360, 3/6/04 -1/22/06)
YR01 directory Data products acquired during Odyssey mapping year 1
(Ls 0 - 360, 4/19/02 - 3/6/04)
YR00 directory Data products acquired during Odyssey mapping year 0
(Ls 315 - 360, 1/25/02 - 4/19/02)
INDEX directory Index of all products in the archive
DOCUMENT directory Documentation for the archive
CATALOG directory Information about the archive in the PDS Catalog
LABEL directory Format files referenced by the PDS labels. These format files describe the column layout of the data files.
SOFTWARE directory Java source code library for parsing GRS data files
Root directory Top-level directory of the virtual volume

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