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ORBVIEW-2
Orbview-2 (sometimes called the Seastar) is part
of Geoeye
(formely Orbimage)’s satellite fleet. It carries NASA’s
SeaWiFS sensor. This is an instrument developed to study the oceans
from the standpoints of total chlorophyll content and eutrophication,
and to establish a general standardized vegetation index (NDVI).
altitude: 705 km
inclination: 98.2 degrees
orbit: sun-synchronous polar
period of revolution: 99 minutes
revisit time: 1 day
satellite: OrbView 2 (01/08/1997– still operational)
SeaWiFS sensor (Sea Viewing Wide Field
of View Sensor)
This multispectral optical sensor collects color imagery of the
Earth’s land and ocean surfaces on a daily basis. Using different
spectral bands yields images that can be used to study marine plankton
and sediments, amongst other things. OrbView-2 provides imagery
for maps used by commercial vessels to detect favorable oceanographic
fishing conditions. The satellite also provides broad-area coverage
in 2,800 km-wide swaths, which are routinely used in naval operations,
environmental monitoring, and global crop-assessment applications.
|
Band
|
Spectral band
|
Resolution |
Use
|
| 1 |
0,402 - 0,422 µm (purple) |
1 x 1 km |
|
| 2 |
0,433 - 0,453 µm (purple
- blue) |
1 x 1 km |
low chlorophyll |
| 3 |
0,480 - 0,500 µm (blue) |
1 x 1 km |
other pigments |
| 4 |
0,500 - 0,520 µm (green) |
1 x 1 km |
|
| 5 |
0,545 - 0,565 µm (green) |
1 x 1 km |
baseline chlorophyll |
| 6 |
0,660 - 0,680 µm (red) |
1 x 1 km |
subsurface scattering |
| 7 |
0,745 - 0,785 µm (near
IR) |
1 x 1 km |
atmospheric correction |
| 8 |
0,845 - 0,885 µm (near
IR) |
1 x 1 km |
atmospheric correction |
Mission
website
Data
distributor
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