CLEM LIDAR Topography Reduced Data Record (RDR)

Description

This file contains topographic profiles and related data along each observational pass during which LIDAR laser range data were acquired.  The data were created using the final spacecraft orientation and orbital solutions.  The laser ranges are believed to be correct, but there may be unresolvable ambiguities due to noise.

This file contains coefficients for a spherical harmonic model of the Moon’s topography field.  The Clementine topography model is known as the Goddard Lunar Topography Model 2B (GLTM-2B).  This is a 70th-degree and –order model, with extrapolation to the poles of the GLTM-2B data using GMT surface, the minimum curvature gridding program of Wessel and Smith (doi:10.1029/90EO00319).  The coefficients are in meters, and are referred to a spherical datum of radius 1,738,000 m.  Thus, the degree zero coefficient is the actual mean radius, minus 1,738,000.

This file contains a digital, 1 x 1 degree resolution gird of the topography of the Moon relative to a spheroid of radius 1738 km at the equator, with a flattening of 1/3234.93.  The data are interpolated from the filtered observations by the “blockmean and surface programs” of the GMT-system of Wessel and Smith (doi:10.1029/90EO00319).  It is a 360 x 180 grid from 89.5 to -89.5 degrees latitude, and 0.5 to 359.5 degrees longitude.  No attempt has been made to provide data at the poles (i.e., beyond about 78 degrees), since the numbers are unconstrained.  The observation is topography in meters.

This file contains a digital, 1 x 1 degree resolution map of the Moon’s topography relative to a spheroid of radius 1738 km at the equator, with a flattening of 1/3234.93.  The data are interpolated from the filtered observations by the “blockmean and surface programs” of the GMT-system of Wessel and Smith (doi:10.1029/90EO00319).  It is a 360 x 180 grid from 89.5 to -89.5 degrees latitude, and 0.5 to 359.5 degrees longitude.  No attempt has been made to provide data at the poles (i.e., beyond about 78 degrees), since the numbers are unconstrained.

This file contains a digital, 0.25 x 0.25 degree resolution grid of the topography of the Moon relative to a spheroid of radius 1738 km at the equator, with a flattening of 1/3234.93.  The data are interpolated from the filtered observations by the “blockmean and surface programs” of the GMT-system of Wessel and Smith (doi:10.1029/90EO00319).  It is a 1440 x 720 grid from 89.875 to -89.875 degrees latitude, and 0.125 to 359.875 degrees longitude.  No attempt has been made to provide data at the poles (i.e., beyond about 78 degrees), since the numbers are unconstrained.  The observation is topography in meters.