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

• ICY (IDL interface to SPICE toolkit)• Kernels

– Duplicate MSSS kernel directory structure locally

id 268697607 time 847429225:96start 0 cross 5056 down 52224cam ctxmode 0x0dac 196offset 187 185sram_base 0start_addr 0exposure 1.87 msec (19)FPA-temp 18.2 C (2398)

FEATURE: ScreenshotBrowse window

Zoomwindow

(autostretched)Features

Last click’s coordinates

Image filename

Feature user comments

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 LROWhat 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