MRO GRS Spherical Harmonics Gravity ASCII Data Record (SHADR)

SHADR – Spherical Harmonics Gravity ASCII Data Record

Instrument: MRO Gravity/Radio Science

PDS Data Set ID: MRO-M-RSS-5-SDP-V1.0DOI: 10.17189/1519521Citations of DOI: 10.17189/1519521

For more information about the SHADR products, see the SHADR SIS.

The MRO Gravity/Radio Science (GRS) Spherical Harmonics Gravity ASCII Data Record (SHADR) product is intended to be general and may contain coefficients for spherical harmonic expansions of gravity, topography, magnetic, and other fields.

SHADR files are created from radio tracking, vertical sounding, in situ, and/or other measurements at the institution conducting the scientific data analysis. Each model requires data with complete sampling (in terms of longitude and latitude coverage on the planet), so that SHADR files will be issued infrequently and on schedules which cannot be predicted at this time.

Due to the scope of the product, information specific to each SHADR is found in its respective detached label.

GRS SHADR products have the following file names:

gGMRO_nnnvv_SHA.TAB (with detached PDS label)

where:

g = generating institution

J = Jet Propulsion Laboratory

G = Goddard Space Flight Center

G = type of data represented = gravity field

MRO = 3-character spacecraft modifier

nnn = 2- or 3-digit maximum degree and order of the solution

vv = 2-digit version number

There is one product named GMM3_120_SHA.TAB, which contains coefficients and related data derived using MRO, Mars Global Surveyor (MGS), and Odyssey (ODY) radio tracking data. More information can be found in its corresponding label file.

In ODE, SHADR products have one of the following Product IDs:

GGMRO_NNN_VV_SHA.TAB

GMM3_120_SHA.TAB