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Satellite Imagery

A world of choice

Trying to decide on satellite imaging? 

4 sat imagesWith all the recent advances in the satellite remote sensing industry, today's decision makers need up to date information in order to make applicable and cost efficient choices.  To keep you informed of new satellite launches and technological advances, we present a brief summary of available systems and key terms.

Definitions

Sensor Types: Optical and radar are the two primary sensor types.
Optical sensors are sensitive to visible and infrared wavelengths.
Radar sensors use microwaves to create and image, and have the
advantage of seeing through clouds as well as working at night.
Multispectral, hyperspectral and multipolarization sensors collect
images in different bands, allowing advanced detection.

Footprint: Refers to the size of the image that the satellite captures.

Spatial Resolution: Is a measure of the smallest feature that may be
detectable by the sensor.

Revisit Time: Is a measure of how often the satellite is able to collect
an image of a specific location on earth.  Some satellites are progammable,
which enables more frequent imaging opportunities.

GeoAnalytic Inc. is an authorized reseller for the following:

 

Optical Satellites

Satellite         
Mission Life

                      Spectral Range
Resolution (m)
Panchromatic
Multispectral
Hyperspectral 
2001/10 -
         √
         √
 
0.6, 2.4
2007/09 -
         √
 
 
0.4
Late 2008
         √
         √
 
0.41, 1.8
1999/09 -
         √
         √
 
1, 4
Early 2008
         √
         √
 
0.41, 1.65
1986/02 -
         √
         √
 
2.5, 5, 10, 20
1972/07 - 
         √
         √
 
15, 30, 57, 120
1999/12 - 
 
 
         √
250, 500, 1000
1999/12 - 
 
 
         √
15, 30, 90

 

 

Radar Satellites

Satellite          
Mission Life
Frequency            
Resolution (m)
1995/11 - 
C-band 5.3 GHz
8-100
 
2007/12 - 
C-band 5.405 GHz
3-100
 

 

 

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