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WorldView-4

Introducing WorldView-4, a multispectral, high-resolution commercial satellite.
Operating at an expected altitude of 617 km in coordination with WorldView-3, WorldView-4 provides 31 cm panchromatic resolution, and 1.24 m multispectral resolution.
With WorldView-4 joining WorldView-3 in the DigitalGlobe constellation, our total constellation has the capability to image a location an average of 4.5 times/day at 1m GSD or less
WorldView-4

+ Specifications

Design and Specifications
Launch Information

Date: November 11, 2016
Launch Site: Vandenberg Air Force Base, California

Orbit Altitude: 617 km
Type: SunSync, 10:30 am descending Node
Period: 97 min
Mission Life

Estimated Service Life: 10 to 12 years

Spacecraft Size, Mass and Power

Size: 5.3 ms (17.7 ft) tall x 2.5 ms (8 ft) across
7.9 m (26 ft) across deployed solar arrays
Aperature:1.1m

Sensor Bands
  • Panchromatic: 450 - 800 nm
  • 4 Multispectral:
    Blue: 450 - 510 nm
    Green: 510 - 580 nm
    Red: 655 - 690 nm
    Near-IR1: 780 - 920 nm
Sensor Resolution
(GSD=Ground Sample Distance)
0.31 m - Panchromatic at nadir
0.34 m - 20° off-nadir
1.00 m - 56° off-nadir
3.51 m - 65° off-nadir
1.24 m - Multispectral at nadir
1.38 m - 20° off-nadir
4.00 m - 56° off-nadir
14.00 m - 65° off-nadir
Dynamic Range 11-bits per pixel Pan and MS
Swath Width 13.1 kilometers at nadir
Attitude Determination and Control

3-axis stabilized
Actuators: Control Moment Gyros (CMGs)
Sensors: Star trackers, solid state IRU, GPS

Pointing Accuracy and Knowledge

 

Retargeting Agility

Time to Slew: 200 kilometers: 10.6 seconds

Onboard Storage

320 gigabits solid state with EDAC

Communications Image and Ancillary Data: 800 Mbps X-band
Housekeeping: 120 kbps real-time, X-band
Command: 64 kbps S-band
Max Contiguous Area
Collected in a single Pass
(30° off-nadir angle)

Mono: 66.5 km x 112 km (5 strips)
Stereo: 26.6 km x 112 km (2 pairs)

Revisit Frequency
(at 40°N Latitude)

1 m GSD: <1.0 day
4.5 days at 20° off-nadir or less

Geolocation Accuracy
(CE90)

Predicted <4 m CE90 without ground control

Capacity

680,000 km² per day

+ Features

FeaturesBenefits
Very high-resolution
  • Panchromatic 31 cm
  • Visible and near-infrared 1.24 m
  • Simultaneous, high resolution, multi-spectral imagery
  • Large area single-pass (synoptic) collection eliminates temporal variations
  • Precision geo-location possible without ground control points
  • Global capacity of 680,000 km² per day
High capacity in various collection mode

 

Bi-directional scanning

 

High capacity in various collection modes  
Bi-directional scanning  
Rapid retargeting using Control Moment Gyros (>2x faster than any competitor) resulting in superior area and point target collection capability  
Direct Access tasking from and image transmission to customer sites  
Daily revisits  
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