SPOT 5 First Image, © CNES 2002
|
|
| Spectral band continuity and
improved spatial resolution |
The SPOT 5 spectral bands will be the same as
those for SPOT 4: B1 (0.50-0.59 µm); B2 (0.61-0.68 µm); B3
(0.79-0.89 µm); and SWIR (1.58-1.75 µm). The panchromatic band
will, however, return to the values used for SPOT -1/ -3 (Pan: 0.51-0.73 µm).
As requested by many users, this will ensure continuity of the spectral
bands established since SPOT 1. Spatial resolutions will, on the other
hand, be improved within the limits of technical feasibility as the
field width of each instrument will be also kept identical. The
high-resolution panchromatic mode will go from 10m to 5m and
2.5m and
the multispectral mode (B1, B2, B3) from 20m to 10m.
|
|
|
Radiometric and geometric quality
Customers using SPOT data for mapping applications are the most
demanding as regards image geometry. They should be happy with SPOT 5
data. The specifications call for a planimetric accuracy of 10 m (rms)
and an elevation accuracy of 5 m (rms). These figures are compatible
with conventional mapping standards at 1:50 000 scale. Whether measured
in terms of the MTF or noise, the radiometric quality of SPOT 5 imagery
will be equal to or better than that of SPOT 4. Thematic interpretation
specialists are assured of good visual interpretation and good control
during digital processing.
Format
CAP Format (Standard SPOT Scene Format) |
|
Mission and system description
The main payload consists of high resolution imaging
instruments delivering the following product improvements compared to
SPOT 4:
-
higher ground resolution: 5 meters
and 2.5 meters (instead of 10 m) in panchromatic mode
-
higher resolution in multispectral
mode: 10 m (instead of 20 m) in all 3 spectral bands in the visible
and near infrared ranges. The spectral band in the short wave
infrared band (essential for VEGETATION data) is maintained at a
resolution of 20 m due to limitations imposed by the geometry of the
CCD sensors used in this band
-
field width of each instrument: 60
km, same as SPOT 1, 2, 3, & 4
-
the oblique viewing capacity of
each instrument is maintained providing rapid access to a given area
-
a dedicated instrument for along
track stereo acquisition on board SPOT 5
|
