Copy of Space Image Sensors - Alrad
Copy of Space Image Sensors - Alrad

Copy of Space Image Sensors

Space Image Sensors

 

C640 for 3D Terrain Mapping Camera (TMC)

  • 4000 linear image sensor, PGA, 12 bit ADC output
  • Destructive / Non destructive readout mode
  • Global exposure control pin to control integration time
  • Low fixed pattern noise, high dynamic range

 

C650 for Hyper-Spectral Imager Camera (HySI)

  • 256 x 512 area sensor, PGA, 12 bit ADC output
  • 50 μm x 50 μm pixel size
  • Snap shot function, up to 250 ms integration time
  • Row wise response compensation, dark voltage cancellation
  • < 1 % of the linearity

 

C468 for CMOS MSOC

  • 12,000 pixels of PAN and 6,000 pixels of four Multi-spectral (B, G, R, NIR)
  • Extra high speed (0.3 ms / line integration time)
  • 10 μm x 10 μm for PAN and 20 μm x 20 μm for Multi-spectral

 

Moon Missions

Japan China India USA
Satellite Kaguya Chang'e-1 Chandrayaan-1 Lunar Reconnaissance Orbiter
Overall Weight [tons] 3.0 2.3 1.4 -
Launch Date September 2007 October 2007 October 2008 June 2009
Camera Type Terrain Camera & Multi-band 3D Terrain Mapping 3D Terrain Mapping 3D Terrain Mapping
Sensor CCD CCD CMOS (C640) CCD
Camera Weight [Kg] 9.4 > 30 6.3 9.8
Camera Power [Watts] > 10 1.8 20

 

Radiation

CCD CMOS
< 100 krad < 300 krad

 

 

Focal Plane Array  (Space Camera)

 

  • PAN: 12000 pixel, 10 um pitch, @297 us+/- 5% integration time
  • MS (4 bands): 6000 pixels, 20um pitch, @594 us +/- 5% integration time
  • Band to band registration error < 1um
  • Band to band peak elevation < 1um

SNR Requirements

Band Band Definition [nm] Mean Irradiance [W/m2]
Saturated Irradiance [W/m2] SNR @ Mean Irradiance
PAN 400 ~ 700 0.1430 0.5460 ≥ 100
B1 455 ~ 515 0.0318 0.1193 ≥ 105
B2 525 ~ 595 0.0350 0.1402 ≥ 105
B3 630 ~ 690 0.0319 0.1239 ≥ 105
B4 762 ~ 897 0.0571 0.2445 ≥ 105