All images and diagrams © SPOT Image

SPOT Satellites

Système pour l'observation de la Terre

 

 

Platform Lifetime
(design)
Altitude Equator Crossing Adjacent Orbits Repeat Coverage Sensors
SPOT 1
SPOT 2
SPOT 3

 1986-present
1990-present
1993-1996
(3 years)

822 km

10:30 a.m.

1-5 days

26 days

HRV

SPOT 4

 1998-present
(5 years)

822 km

10:30 a.m.

1-5 days

26 days

HRVIR
Vegetation

SPOT 5 2002-present
(5 years)
822 km 10:30 a.m. 1-5 days 26 days HRG
Vegetation

 

SPOT Sensors

Sensor Resolution (m) Swath Width (km)  Sensor Channels Spectral Bands (µm)  Example
High Resolution Vertical (HRV)

"P" mode: 10

60
117

 PAN

0.51-0.73  

"XS" mode: 20

60
117

 HRV1

0.50-0.59 (green) Toronto, Ontario (June 4, 1987)
HRV2 0.61-0.68 (red)
HRV3 0.79-0.89 (near IR)
High Resolution Vertical Infrared (HRV-IR)

 "M" mode: 10

60
117

 MONO

0.61-0.68  Paris, France

 "Xi" mode: 20

60
117

 HRV-IR1

 0.50-0.59 (green)  
HRV-IR2 0.61-0.68 (red)
HRV-IR3 0.79-0.89 (near IR)
HRV-IR4 1.58-1.75 (mid-IR)
High Resolution Geometric (HRG)

 "P" mode: 5.0

"Supermode": 2.5

60
117

 PAN

0.48-0.71 Cairo, Egypt

 "Xi" mode: 10 - 20

60
117

 HRG1

 0.50-0.59 (green)  
HRG2 0.61-0.68 (red)
HRG3 0.79-0.89 (near IR)
HRG4 1.58-1.75 (mid-IR)
Vegetation Monitoring Instrument (VMI)

 1,000

 2,250

 VMI0

0.45-0.52 (blue) First VMI Image

Mt. Etna

VMI2 0.61-0.68 (red)
VMI3 0.78-0.89 (near IR)
VMI4 1.58-1.75 (mid-IR)

 


SPOT Orbits

Return to SPOT platforms

 


HRV Imager

Return to Sensors

 


2.5 m "Supermode"

Final Supermode products are generated in three steps:

-

interpolation which consists in interlacing the two images acquired by the offset arrays and interpolating “missing” pixels to obtain an image that is twice as sharp,

-

deconvolution which compensates for blurring introduced by the instrument by applying a filter representing the instrument’s inverse transfer function,

-

noise removal which reduces the noise in the image (amplified by deconvolution) to an acceptable preset level.


 




This three-step process produces a single 2.5 m black-and-white image of 24,000 x 24,000 pixels from two 5 m images of 12,000 x 12,000 pixels...

Return to HRG Sensor


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 copyright © J.M. Piwowar
Last Update: 2011-09-02