1 German Aerospace Center HRSC Data Products Thomas Roatsch, DLR 22-May-2008

2 German Aerospace Center Funktionsweise der HRSC Kamera

3 German Aerospace Center Data Products (1) All Levels: One file per sensor and imaging sequence Level-2: Radiometrically Calibrated Data Input for Photogrammetric Processing

4 German Aerospace Center Data Products (2) Level-3: Geometrically Corrected based on MOLA and Map Projected Level-4: Digital Terrain Models (DTM) Orthophotos (Nadir and Colors)

5 German Aerospace Center Data Products (3) Radiance = RADIANCE_OFFSET + DN * RADIANCE_SCALING_FACTOR Unit is W*m**-2*sr**-1 Reflectance = DN * REFLECTANCE_SCALING_FACTOR

6 German Aerospace Center Level-2 (1) - The data are signed 16-bit data either from data transmitted as 14-bit data (SRC only) or 8-bit data. - The format of the data is a raster format. - All dark, dummy, isolation, and affected pixel are removed from the image.

7 German Aerospace Center Level-2 (2) SRC image size differs: Bypassed data: 1008 pixels x 1018 lines Compressed data:1008 pixels x 1008 lines Some cruise data in old mode: Bypassed data: 1007 pixels x 1018 lines Compressed data:1000 pixels x 1008 lines

8 German Aerospace Center Level-2 (3) Error pixel are marked with the following negative values: -1blemish pixel one pixel for SRC for one blemish one whole column for HRSC for one blemish -2bad pixel (telemetry or decompression problems) typical size: 8 lines x 512 pixels -8 saturated pixel Bad pixels affect other pixels during compression (8x8) !

9 German Aerospace Center Filenaming Convention The following structure of filenames will be used: Hoooo_mmmm_DDl.IMG - camera id H - orbit number oooo - image number in one orbit mmmm - detector id dd (can be nd, s1, s2, p1, p2, re,ir, gr, bl, 10, 11, sr) - level (2,3,4) l - example: H1234_0023_ND2.IMG (small letters at PDS)

10 German Aerospace Center HRSC Data in PSA and PDS (1) - all HRSC data are both in PDS and VICAR format - all data until orbit 4479 available from PSA/PDS (June 2007) - Level-2  MEX-M-HRSC-3-RDR-V2.0

11 German Aerospace Center HRSC Data in PSA (2) - Level-3  MEX-M-HRSC-5-REFDR-MAPPROJECTED-V2.0 = sinusoidal projection for |center_latitude| < 85°, radius = = stereographic projection |center_latitude| > 85°, radius =

12 German Aerospace Center HRSC Data in PSA (3) - Level-4  MEX-M-HRSC-5-REFDR-DTM-V1.0 = sinusoidal projection for |center_latitude| < 85°, = stereographic projection |center_latitude| > 85°, = MOLA radius for both projections ( km) Data until orbit 1961 released, monthly updates

13 German Aerospace Center Display Programs - IDL reader and nasaview are very slow and can not read the large HRSC files - XVD can do this job available from PSA

14 German Aerospace Center Stereo +20 GradStereo -20 Grad Stereo +12 GradStereo -12 Grad Nadir (0 Grad) HRSC: 3D Modellierung mit 5 Stereokanälen

15 German Aerospace Center InfrarotRot HRSC: Ortho- Rektifizierung der 4 Farbkanäle und Nadir BlauGrün Panchromatischer Nadir

16 German Aerospace Center HSI-transformiertes Farbbild HRSC: Kombination der Farb- Orthobilder

17 German Aerospace Center HRSC: Visualisierung der Farb- Orthobilder