ViewingGeometryPerFacet outputs similar data to GetSpots, but also includes lat/lon of each facet center. The inputs and outputs are formatted different.

Example Input: eval_tools/altwg-2020.08.13-macosx-x64/bin/ViewingGeometryPerFacet -date 2018 Nov 27 09:06:17 -obj shape-apV24-512.obj -observer OSIRIS-REX -output VGP_output -spice spoc-jweirich-2018-12-05T17_18_14.888Z_modified.mk -target BENNU

Help: ALTWG Tools version 76219 (built on 2020-Aug-13)

usage: ViewingGeometryPerFacet [options]

• -date <arg> Required. Observation date. Format can be anything

  • readable by the SPICE str2et method.

  -frame <arg> Shape model reference frame. Default is IAU_{target}. -logFile <arg> If present, save screen output to log file. -logLevel <arg> If present, print messages above selected priority.

  • Valid values are ALL, OFF, SEVERE, WARNING, INFO, CONFIG, FINE, FINER, or FINEST. Default is INFO.

  -obj <arg> Required. Shape model for target body. -observer <arg> Required. SPICE name of observer. -output <arg> Output filename. Default is to print to console. -spice <arg> SPICE kernel(s) to load. Multiple kernels may be

  • specified separated by whitespace.

  -target <arg> Required. SPICE name of target.

This program calculates the viewing geometry for a shape model at each facet visible from the observer.