Apologies: I forgot to read the manual…   2 comments

From the Lunar Reconnaissance Orbiter Lunar Orbiter Laser Altimeter Reduced Data Record and Derived Products Software Interface Specification:  p. 30, 31

SAMPLE_BITS = 16
UNIT = METER
SCALING_FACTOR = 0.5
OFFSET = 1737400.
/* NOTE: */
/* Conversion from Digital Number to HEIGHT, i.e. elevation in meters, is: */
/* HEIGHT = (DN * SCALING_FACTOR). */
/* The conversion from Digital Number to PLANETARY_RADIUS in meters is: */
/* PLANETARY_RADIUS = (DN * SCALING_FACTOR) + OFFSET */
/* where OFFSET is the radius of a reference sphere. */
/* The planetopotential TOPOGRAPHY is PLANETARY_RADIUS – GEOID_RADIUS, */
/* where GEOID_RADIUS is derived from a gravitational equipotential model. */
/* By convention, the average GEOID_RADIUS at the equator is OFFSET. */

So, everything on these pages that is in 3D is exaggerated 2x in the Z direction.  Sorry for the mistakes.  I will be correcting the recent images and labeling the corrections.

Howard Fink

This information is not in the catalog files or label files that accompany the image files.

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Posted February 2, 2011 by finkh in Uncategorized

2 responses to “Apologies: I forgot to read the manual…

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  1. I need a link immediately from the south polar region on jp2 format, ask for help.

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