Accuracy
With a foreseen accuracy of
3–7m (CE90%) WorldView-1
provides map ready imagery right
off the satellite, meaning a
reduced need for costly GCPs
and making orthorectification
quicker and more accurate.
The expected geolocation accuracy
using the initial attitude/ephemeris
(available immediately after
downlink) is 19 metres, while
using the refined attitude/ephemeris
(available within 2 hours of
pass) it is 5 metres. Pointing
accuracy is less than 500 metres. |
Agility
With a slew time of 7 seconds
across 200 km WorlView-1 can
look forward, back, East and
West to acquire multiple targets
per pass. Along with bi-directional
scanning, this means much greater
collection capacity, much faster
collection of orders in high
competition areas and efficient
in-track stereo collection. The
satellite can downlink and acquire
data simultaneously and the onboard
storage – 2,200 Gbits SSR – and
high-speed downlink
– 800 Mbps (dual polarization),
redundant antennas – give
improved collection capacity,
four times that of QuickBird.
|
Tasking
Availability
Although NGA has acquired approximately
60% of the global capacity on
WorldView-1, DigitalGlobe states
that the commercially available
capacity on WorldView-1 is equal
to (at a minimum) that of another
QuickBird
Most data collected for NGA will
be available for purchase out
of the archive at the archive
price
It is likely that in the future
NGA will decide to move some
of their orders from QB to WV-1,
therefore DigitalGlobe expects
that this will free more tasking
capacity on QuickBird. |
