urn:nasa:pds:chang_e_microwave_processed:miscellaneous:hpar_global_128ppd 1.0 1.21.0.0 Product_Observational Hayne, P.O.; Bandfield, J.L.; Siegler, M.A.; Vasavada, A.R.; Ghent, R.R.; Williams, J.P.; Greenhagen, B.T.; Aharonson, O.; Elder, C.M.; Lucey, P.G.; Paige, D.A. St. Clair, Michael; Ward, Jennifer 2024 This is a map of the lunar "H-parameter" from -70 to 70 latitude and -180 to 180 longitude, presented in equirectangular projection at 128 pix/deg. The H-parameter is a measure of increase in density (and therefore thermal conductivity) with depth. It is defined as the term "H" in the density model rho(z) = rho_d - (rho_d - rho_s) ** exp(-z / H) where z is depth, rho(z) is density at depth z, rho_s is density at the surface, and rho_d is density for z-values >> H. The values in this map are based on best fits to data from LRO Diviner channel 7 (25-41 um). The data used to create this file were originally released in ENVI-style .bin files as a supplement to Hayne et al. 2017. This version presents those data in FITS format with slight data type changes and truncated backplanes for standards compliance and storage efficiency; no precision is lost. The temperature modeling pipeline used to produce some derived data in this bundle uses this map as an input. 2024-05-27 1.0 Initial archive version. Science Derived LUNAR RECONNAISSANCE ORBITER Mission urn:nasa:pds:context:investigation:mission.lunar_reconnaissance_orbiter::1.1 data_to_investigation LUNAR RECONNAISSANCE ORBITER Host urn:nasa:pds:context:instrument_host:spacecraft.lro::1.2 is_instrument_host DIVINER LUNAR RADIOMETER EXPERIMENT Instrument urn:nasa:pds:context:instrument:lro.dlre::1.0 is_instrument Moon Satellite urn:nasa:pds:context:target:satellite.earth.moon::1.1 data_to_target HPARAM display_settings_to_array Sample Left to Right Line Top to Bottom HPARAM cartography_parameters_to_image_object -180 180 70 -70 Equirectangular 0 0 0 Coordinate Pair 236.901 236.901 128 128 -5458199.04 2122632.96 Planetographic 1737400 1737400 1737400 Positive East Body-fixed Rotating MOON_ME urn:nasa:pds:lro_diviner_calibrated::1.0 data_to_calibrated_product Bundle containing calibrated Diviner data used to derive H-parameter values. 10.1002/2017JE005387 Hayne, P. O., Bandfield, J. L., Siegler, M. A., Vasavada, A.R., Ghent, R. R., Williams, J.-P., Greenhagen, B.T., Aharonson, O., Elder, C.M., Lucey, P.G., Paige, D.A. (2017). Global regolith thermophysical properties of the Moon from the Diviner Lunar Radiometer Experiment. Journal of Geophysical Research: Planets, 122, 2371–2400. Article describing process used to derive these data as well as useful theoretical context. hpar_global_128ppd.fits 2024-01-12T15:31:22Z 1651907520

PRIMARY_HEADER 0 2880 FITS 3.0

HPARAM_HEADER 2880 2880 FITS 3.0

HPARAM 5760 2 Last Index Fastest H-parameter (density increase with depth) values based on Diviner data. SignedMSB2 1.52592238142350E-05 0.4999989867210388 Line 17921 1 Sample 46081 2 -32768

LATITUDE_HEADER 1651642560 2880 FITS 3.0

LATITUDE 1651645440 1 Last Index Fastest Latitude values corresponding to the y (Line) axis of the HPARAM array. As that array is in equirectangular projection, the values of this array can simply be repeated across the entire x axis to generate a traditional 'backplane'. IEEE754MSBSingle Sample 17921 1

LONGITUDE_HEADER 1651717440 2880 FITS 3.0

1651720320 1 Last Index Fastest Longitude values corresponding to the x (Sample) axis of the HPARAM array. As that array is in equirectangular projection, the values of this array can simply be repeated across the entire y axis to generate a traditional 'backplane'. IEEE754MSBSingle Sample 46081 1