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FEATURE Overview & Update

Brian Carcich

Peter Thomas

Cornell University

Based on CIRCLE.PRO by Ernest Bowman-Cisneros

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FEATURE Agenda

• Why FEATURE?• Status of FEATURE• What FEATURE does (demo)• FEATURE output, input, environment• How FEATURE models data

– Geometry; Shape; SPICE Kernels

• Issues of note, To Do• VRML Tool (demo)• Backup slides

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Why FEATURE?

Mapping, note taking, simple measures

• Points: locations, density distribution

• Lines: sizes and azimuths

• Circles: sizes and density distribution

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Status – Since Nov, 2008

• Done

– Successfully used flight test data!– LRO/generic TDI/Line imager intersection framework– Site-independent SPICE kernel management

• EKKM not site-independent, but close enough

– Hi-resolution lunar rotation model• Generic shape model interface: user supplies model

– Read PDS subwindows• Postponed/obsolete: use pds2isis

– Developed VRML tool

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What FEATURE doesLocate, identify & record surface FEATUREs

• Locate– Line, Sample– Latitude, Longitude

• Identify– Points: PRFs; &c.– Lines: Grooves; ridges; &c.– Circles: Craters; &c.– Assign comments, IDs

• Record– Flat ASCII format

• One line/feature

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FEATURE Output: Sample record file

VERSION 1 9 311.66 29907.18 -999.00 -999.00 -999.00 -999.00 -999.000 -999.00 -999.00 -999.000 50000 5000 m00725569 PRF 536.29 29782.81 12.84 -999.00 -999.00 -999.00 -999.000 -999.00 -999.00 -999.000 50000 5000 m00725569 Crater 87.15 29872.54 23.12 -999.00 -999.00 -999.00 -999.000 -999.00 -999.00 -999.000 50000 5000 m00725569 Crater 312.40 29841.20 21.84 -999.00 -999.00 -999.00 -999.000 -999.00 -999.00 -999.000 50000 5000 m00725569 Crater 175.00 29767.00 170.00 29837.00 -999.00 -999.00 -999.000 -999.00 -999.00 -999.000 50000 5000 m00725569 Ridge 547.00 28434.00 847.00 28501.00 -999.00 -999.00 -999.000 -999.00 -999.00 -999.000 50000 5000 m00725569 Ridge

<--1---> <--2---> <-----3------> <-----4------> <---5---> <--6---> <-7->

1. Feature: S1,L1 (Center if circle)2. Feature: S2,L2 (line) or Radius,-999 (circle) or -999,-

9993. Feature: Lat,Long,Radius of S1,L14. Feature: Lat,Long,Radius of S1,L1 (line) or -999,-9995. Image: NL, NS6. Image: filename prefix7. Feature: User comment, ID

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FEATURE Input

• Local IsisCube: PDS EDR=>[pds2isis]

– Alternative: SOC Server proposal; see backup slides

• Lunar shape model

– Radius map; FITS file w/specific keywords

• SPICE kernels– Mirror of SOC directory hierarchy– Two FEATURE-specific meta-kernels

• Requires Minimal localization to text file

– Scripts exist to automate update

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FEATURE Environment

• Linux– Eunuchs™, OSX, Windows/Cygwin should also work

• IDL (V5+?) with GUI– GSFC Astron library (FITS)– Misc Cornell IDL utilities

• ISIS– Pds2isis

• Replace with web application?– IsisDlm– 3rd-party libraries

• Carcich time

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How FEATURE models data

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How: Geometry Model

∙

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How: Shape Model description

Image [line,samp] to [latitude,long.]• Local image: PDS => [pds2isis] => IsisCube• Geometry(t) TDI model from image header info

Pixel line,sample in image … time of pixel exposure …

t = A + B x line + C x sampA, B from image header; C=0 for LROC

SPICE lookup F(t,sample,SCLK,SPK,CK,FK,IK) … Body-fixed image- & pixel-specific ray … DEM shape intersection … Selenocentric latitude & longitude

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How: Shape Model

• Generic user-supplied DEM (FITS file)– Mapping info in FITS header– Moon: CLEM. Data

• Delta from spheroid (Req = 1738km; ƒ = 1/3234.93)

• 4 pixel/deg (~8km/pixel)• PDS CLEM1-L-LIDAR-5-TOPO-V1.0 data set

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How – SPICE Kernel Management

• “The Achilles heel of SPICE is kernel management”• You can try this at home

– Scripts mirror LROC SOC SPICE kernel directories– EKKM: E-Kernel Kernel Management

• E-Kernel: portable database w/SPICE toolkit I/F• Loads only the necessary kernels

– Object interface for IDLIDL> ekkm = newekkm(‘lro.ek’)IDL> ekkm->FindByTime,START_TIME,STOP_TIMEIDL> delekkm,ekkm∙

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Issues of note

• Flight-quality Kernels (FK, IK): TBD– AI: Project

• ISIS IDL DLM: 32kLine limitation– AI: USGS/ISIS/KBecker

• Moon reference frame for shape model– IAU_MOON, MOON_PA, MOON_ME

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FEATURE TODO

• ISIS DLM to handle > 32k lines (USGS/KBecker)• Continue documentation: installation; use; tutorial• Port/install to volunteers’ environments• Port new framework back to MRO• Flight-quality Frames kernels (Project)

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VRML Visualization Tool

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VRML Visualization Tool (cont’d)

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Backup slides (details)

• Status – Done

• How - Code

• Where

• Who & When

• SOC Server proposal

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Backup slides (details)

• Status – Done

• How - Code

• Where

• Who & When

• SOC Server proposal

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Status - Done

• Week ending 2008-11-07– Create & use subwindow object– Read ISIS cubes & subwindows– Read ddd subwindows

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How - Code

• IDL– Based on EBC CIRCLE.PRO– ICY SPICE/IDL interface (DLM)– READ_ANY_IMAGE.PRO

• Custom code; extends IDL’s QUERY_*, READ_*• FITS via GSFC Astron library• PDS via custom code• IsisCube via ISIS DLM• DDD via custom reader• Recent sub-window object/reader for performance

– DDD, IsisCube working– PDS future

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Where

• Bodies (for line,samp=>Lat,Long)– Mars– Moon– TDI/Line CCD extendible to any near-sphere

• Missions (for line,samp=>Lat,Long)– MRO– LRO (CUB only)

• Development– Cornell

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Who & When

• EBC CIRCLE.PRO ca 2002?• PCT Updated specs (point, line, circle) ca 2006

– pthomas@astro.cornell.edu

• BTC CIRCLE.PRO => FEATURE.PRO ca 2006– ddd, MRO line,sample=>Lat,Long

• November, 2007, updated July, 2008

– IsisCube, LRO line,samp=>Lat,Long• May, 2009

– carcich@astro.cornell.edu

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SOC Server Proposal

• Problem: large files copied to local disk• Need image + ancillary data

– Header info, SPICE/geometry

• Deliver subwindows a la JPEG2000/JPIP• Pros

– JIT delivery of desired image data– Could eliminate stale local files

• Cons– Network dependency (availability, performance)