FEATURE Basics Convert Feature X in image Y

FEATURE: Basics • Convert Feature X in image Y to Line(s), Sample(s) – Load & display ddd image – Graphical interface: click on feature • Convert Line, Sample to Lat, Long (NEW) • Save information in flat file (ASCII text)

FEATURE: Requirements • Pieces required to run FEATURE – GUI computer – IDL – Image (e. g. MSSS ddd format) • ddd file header – TDI timing – DTM (e. g. from PDS) – SPICE id 268697607 time 847429225: 96 start 0 cross 5056 down 52224 cam ctx mode 0 x 0 dac 196 offset 187 185 sram_base 0 start_addr 0 exposure 1. 87 msec (19) FPA-temp 18. 2 C (2398) • ICY (IDL interface to SPICE toolkit) • Kernels – Duplicate MSSS kernel directory structure locally

FEATURE: Screenshot Browse window Image filename Feature user comments Features Last click’s coordinates Zoom window (autostretched)

FEATURE: Compatibility • • Unix , Linux PC Win Mac From requirements slide: • Pieces required to run FEATURE – GUI computer – IDL – Image (e. g. MSSS ddd format) • ddd file header – Contains S/C, instrument, TDI timing – DTM (e. g. from PDS) – SPICE • • ICY (IDL interface to SPICE toolkit) Kernels – Duplicate MSSS kernel directory structure locally

FEATURE: Status • • • GUI: working Click Feature X to Line, Sample: working Save info to text file: working Line, sample to Lat, Long calcs: working Integrate Lat, Long calcs: soon

FEATURE: MRO to LRO What will be needed for FEATURE to work with LRO? • FEATURE is largely mission-independent – Model: each image pixel is a ray in space; ray intersects surface (DTM) – Pixel image timing (from header) SPICE lookup ray geometry – Minor mission-specific modifications to FEATURE code are likely • Ideally the LRO ddd headers will be similar to MRO headers • LRO-specific SPICE files: likely from project – Instrument & Frame Kernels (IKs & FKs) • Ideally the project defines the same SPICE variables as MRO – Leapsecond & spacecraft clock kernels (LSKs & SCLKs) – Trajectory & attitude Kernels (SPKs & CKs; ongoing downloads) – “The achilles heel of SPICE is kernel management” • Lunar DTM: convert to same format as MOLA PDS MEGDRs – FEATURE is currently limited to DTMs that fit into a single image as Radius vs Lat, Lon (32 pixel/degree MOLA data) – This limitation may be removed in the future