Maxar’s Next-Generation Earth Imaging Satellites: WorldView Legion
Maxar Technologies, a leading provider of Earth imagery and intelligence, is set to revolutionize the satellite imaging industry with its next generation of Earth imaging satellites – WorldView Legion. This constellation of satellites will be comprised of six 30cm resolution satellites designed to provide organizations with highly accurate and up-to-date satellite imagery. The ability of WorldView Legion to revisit a target area up to 15 times per day will provide organizations with near real-time information that is crucial to making informed decisions. And with the capacity to collect an astonishing 5 million square kilometers per day of satellite imagery, organizations will have a comprehensive view of the Earth like never before. Whether it is monitoring crops and wildlife, predicting natural disasters, or tracking the impact of human activities, WorldView Legion will provide organizations with the information they need to move forward with confidence.
Six 30cm class satellites
Sun synchronous and mid inclination orbits
Up to 15 revisits per day
Date: September 18, 2007
Launch Vehicle: Delta 7920 (9 strap-ons)
Launch Site: Vandenberg Air Force Base, California
Altitude: 617 km
Type: Sun synchronous, 10:30 am descending node
Period: 97 min
Spacecraft Size, Mass and Power
Size: 5.7 m (18.7 ft) tallx2.5 m (8 ft) across
7.1 m (23 ft) across deployed solar arrays
Mass: 2800 kg (6200 lbs)
Power: 3.1 kW solar array, 100 Ahr battery
Panchromatic: 450–800 nm
8 Multispectral: 397-1039 nm
8 SWIR Bands: 1184-2373 nm
12 CAVIS Bands: 405-2245 nm
Panchromatic nadir: 0.31 m
20 degrees off-nadir: 0.34 m
Multispectral nadir: 1.24 m
20 degrees off-nadir: 1.38 m
SWIR nadir: 3.70 m
20 degrees off-nadir: 4.10 m
CAVIS nadir: 30.00 m
11-bits per pixel pan and MS; 14-bits per pixel SWIR
At nadir: 13.1 km
Attitude Determination & Control
Type: 3-axis Stabilized
Actuators: Control Moment Gyros (CMGs)
Sensors: Star trackers, precision IRU, GPS
Pointing Accuracy & Knowledge
Accuracy: <500 m at image start/stop
Knowledge: Supports geolocation accuracy below
Time to slew 200 km: 12 sec
2199 GB solid state with EDAC
Image & ancillary data: 800 and 1200 mbps X-band
Housekeeping: 4, 16, 32, or 64 kbps real time, 524 kbps stored, X-band
Command: 2 or 64 kbps S-band
Max Contiguous Area Collected in a Single Pass (30° off-nadir)
Mono: 66.5 kmx112 km (5 strips)
Stereo: 26.6 kmx112 km (2 pairs)
Revisit Frequency (at 40°N Latitude)
1 m GSD: <1.0 day
4.5 days at 20 degrees off-nadir or less
Predicted <3.5 m CE90 without ground control
680,000 sq km per day
WorldView Legion is right for your project?
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Vice President of Exploration, Bluestone Resources
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Government of Canada