# Presentation: 663984

## HRSC Data Products

- Thomas Roatsch, DLR
- 22-May-2008

## Funktionsweise der HRSC Kamera

**Funktionsweise der HRSC Kamera**

## Data Products (1)

- All Levels:
- 	One file per sensor and imaging sequence
- Level-2:
- 	Radiometrically Calibrated Data
- 	Input for Photogrammetric Processing

## Data Products (2)

- Level-3:
- 	Geometrically Corrected based on MOLA
- 	and Map Projected
- Level-4:
- 		Digital Terrain Models (DTM)
- 		Orthophotos (Nadir and Colors)

## Data Products (3)

- Radiance = RADIANCE_OFFSET +
- 		DN * RADIANCE_SCALING_FACTOR
- Unit is 	W*m**-2*sr**-1
- Reflectance = DN * REFLECTANCE_SCALING_FACTOR

## 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.

## 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

## Level-2 (3)

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

## 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*)

## 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

## HRSC Data in PSA (2)

-  Level-3
- MEX-M-HRSC-5-REFDR-MAPPROJECTED-V2.0
- = sinusoidal projection for |center_latitude| < 85°,
- 	radius = 3396.19
- = stereographic projection |center_latitude| > 85°,
- 	radius = 3376.2

## 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 (3396.0 km)
- Data until orbit 1961 released, monthly updates

## 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

## HRSC:  3D Modellierung mit 5 Stereokanälen

**HRSC:  3D Modellierung mit 5 Stereokanälen**

## HRSC:  Ortho- Rektifizierung der 4 Farbkanäle und Nadir

**HRSC:  Ortho- Rektifizierung der 4 Farbkanäle und Nadir**

## HRSC:  Kombination der Farb- Orthobilder

**HRSC:  Kombination der Farb- Orthobilder**

## HRSC:  Visualisierung der Farb- Orthobilder

**HRSC:  Visualisierung der Farb- Orthobilder**