Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-A

Since 1997:

- numerous pilot projects

for commercial and

scientific applications

- camera technology was

originally developed for

the Russian Mars 96

space mission and

modified for airborne

remote sensing

applications

Since 1997:

- numerous pilot projects

for commercial and

scientific applications

- camera technology was

originally developed for

the Russian Mars 96

space mission and

modified for airborne

remote sensing

applications

HRSC-A: Digital airborne multispectral stereo scanner

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-AX: new generation

Since 2000:

- Spin-off of the HRSC-A system

- Technical changes vs. HRSC-A:

• extended field of view (12k-CCD-lines)• higher data rates => higher geometrical

resolution• higher radiometrical resolution (12 bit)• optimized color registration• true-color due to optimized color filters

Since 2000:

- Spin-off of the HRSC-A system

- Technical changes vs. HRSC-A:

• extended field of view (12k-CCD-lines)• higher data rates => higher geometrical

resolution• higher radiometrical resolution (12 bit)• optimized color registration• true-color due to optimized color filters

HRSC-AX / W: Airborne Extended / Wide

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-AX / -AXW / -A Technical Data

HRSC-AX HRSC-AXW HRSC-A

Focal Length 150 mm 47 mm 175 mm

Number of CCD-Lines 9 (4 colors) 5 (2 colors) 9 (4 colors)

Pixel/CCD-Line 12,000 12,000 5,184

Field of View 41° • 29° 30° • 79° 38° • 12°

Stereo Angles ±20.5°, ±12.0° ±14.5°, ± 2.2° ±18.9°, ±12.8°

Color Lines vs. Nadir -4.6°/-2.3°/2.3°/4.6° -7.3°/7.3° -15.9°/-3.3°/3.3°/15.9°

Pixel Size 6.5 μm 6.5 μm 7 μm

IFOV: 0.0025° (8.9’’) 0.0079° (28.5’’) 0.0023° (8.3’’)

Max. Scan Rate 1,640 lines/s 1,640 lines /s 450 lines /s

Ground Resolution at 450 Hz 16 cm / 4 cm 16 cm / 13 cm 16 cm / 4 cmGround Resolution at 820 Hz 4 cm / 4 cm 4 cm / 13 cm -(at h=1000 m, v=70 m/s)

Radiom. Resolution 12 bit 12 bit 8 bit

Direct georeferencing Applanix POS-AV/DG 510

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-AX Camera integration with AIMU

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

Overview: peripheral devices

Applanix POS, Sony Tape Recorder

Camera Control Unit

Zeiss T-AS PlatformMain Power Supply

HRSC-AX/W

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-A: flight configuration

HRSC-A in a Cessna 208 Caravan

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-AX: flight configuration

HRSC-AX Camera in a Beech 200

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

Orientation Data

Estimation of Boresight Offsets and Drifts, Time Offsets, GPS-Offset and Drift

Image information(Tiepoints)

Calibration data(of all stereo lines)

Orientation data(by DGPS-INS processing)

Estimation of φ und κ boresight offsets (and drifts *) and time offset between image and attitude data by optimization of ray intersection of 5 stereo observations within each image strip

Estimation of ω boresight offsets (and drifts *) and time offset between image- andposition data by optimization of tiepoints between image strips

Estimation of offset and drift of DGPS position data(in case of errorneous DGPS solution)

Orientation data(by DGPS-INS processing)

Boresight offsets (and drifts),time offsets,

( GPS offset and drift)Final orientation data+ =

GroundControlPoints

* (boresight drifts are estimated in case of reduced IMU quality)

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

Geometric correction (extreme conditions)

HRSC-QM, Berlin, Mai 1998, Flight altitude 3000m

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-QM, railroad yard near Duisburg, Mai 1998, Flight altitude 3000m

Geometric correction (extreme conditions)

Raw data Geometrically corrected data

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

Geometrical correction

Muenchen, Nov 11, 2001, Flight Altitude 2,500 m, Ground Resolution 10x18 cm

Original image HRSC-AX

1,650 m

Correction 1

no time shiftTsbet=Timage

Correction 2

time shiftdT = 6 ms

Flight direction

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

Geometrical correction (details)

Muenchen, Nov 11, 2001, Flight Altitude 2,500 m, Ground Resolution 10x18 cm

Correction 2with time shiftdT = 6 ms

Roll-angle movement: no

Original image HRSC-AX

Roll-angle movement:10-12 Hz2-3 pixel ampl. (5 µdeg)

Correction 1no time shiftT sbet = T image

Roll-angle restmovement:10-12 Hz1 pixel (2 µdeg)

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

Cartographic Data Products

Example 1:

HRSC-A: Digital Color Image Map1 : 5000Berlin, 2000

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

Cartographic Data Products

Example 2:

HRSC-A: Digital Elevation Model300 km2, 50 cm rasterAbsolute accuracy 20 cmBerlin, 2000

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-AX DSM- and Ortho-Products

Halle (Sachsen-Anhalt), July 6, 2001, Flight Altitude 5,000 m, Ground Resolution 20 cm

DSM 1 m-grid RGB 20 cm/pixel False-Color-Infrared 20 cm/pixel

1,650 m

Viewgraphs provided by courtesy of sergej.sujew@dlr.de

HRSC-AX RGB-True Color

Berlin-Adlershof, May 3, 2001, Flight Altitude 5,000 m, Ground Resolution 20 cm