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WORLDVIEW
WORLDVIEW-1
WorldView-1 is one of the DigitalGlobe
constellation of very high resolution satellites. This agile satellite
has a high average revisit time and is capable of collecting up
to 750,000 square kilometers (290,000 square miles) per day. WorldView-1
provides only panchromatic (black and white) imagery, but the resolution
of 0.41 m is one of the highest available. Digital Globe's operating
license from the U.S. Government requires re-sampling the imagery
to 0.5-meter for all customers not explicitly granted a waiver by
the U.S. Government.
altitude: 496 km
inclinatson: 98 degrees
orbit: sun-synchronous polar
orbit period: 94,6 minutes
revisit time: 1.7 - 4.5 days
swath width: 17.6 km
satellite: Worldview-1 (18/09/2007 - operational)
Capteur
| Mode |
Spectral band |
Resolution |
| Panchromatic |
0,4 - 0,9 µm |
0,5 m au nadir |
Mission
website
WORLDVIEW_2
WorldView-2 is the only commercial satellite offering
imagery that combines the advantages of both 8-band multispectral
capability and very high resolution. Its average revisit time allows
collecting up to 975,000 square kilometers (376,000 square miles)
per day. WorldView-2 provides 46 cm resolution images in panchromatic
mode and 1.84 meter resolution images in multispectral mode.
altitude: 770 km
inclinatson: 98 degrees
orbit: sun-synchronous polar
orbit period: 100 minutes
revisit time: 1.1 – 3.7 days
swath width: 16.4 km
satellite: Worldview-2 (8/10/2009 - operational)
Sensor
This very high resolution optical sensor can acquire panchromatic
as well as multispectral data. Along with the four typical multispectral
bands in the visible and near infrared, WorldView-2 imagery also
contains 4 additional colours allowing enhanced multispectral analysis.
| Mode |
Spectral band |
Resolution |
| Panchromatic |
0,450 - 0,800 µm |
0,5 m x 0,5 m |
| Mode |
Band |
Spectral
band |
Applications |
Multispectral
|
1 |
0,770 - 0,895
µm (near IR 1) |
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| 2 |
0,630 - 0,690
µm (red) |
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| 3 |
0,510 - 0,580
µm (green) |
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| 4 |
0,450 - 0,510
µm (blue) |
|
| 5 |
0,705 –
0,745 µm (red-edge*) |
Analysis of vegetative
condition. Directly related to plant health |
| 6 |
0,585 –
0,625 µm (yellow) |
Vegetation applications
– Facilitates the "true-color" representations |
| 7 |
0,400 - 0,450
µm (coastal band) |
Vegetation identification
and analysis, bathymetric studies based upon its chlorophyll
and water penetration characteristics, atmospheric corrections |
| 8 |
0,860 –
1,040 µm (near IR 2) |
Vegetation analysis and
biomass studies (less affected by atmospheric influence than
the NIR 1 band) |
* Red Edge: Spectral region at the limit of the
red and near-infrared wavelengths characterized by a sharp rise
in the plant reflectance
Mission
website
Data
Distributors
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