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WorldView-1

WorldView-1 is a high-capacity, panchromatic imaging system featuring true 50 cm resolution imagery. It was launched in September 2007. 

Operating at an altitude of 496 kilometers, WorldView-1 has an average revisit time of 1.7 days and is capable of collecting over one million square kilometers per day of 50 cm imagery.

The satellite is also equipped with state-of-the-art geolocation accuracy capabilities and exhibits stunning agility with rapid targeting and efficient in-track stereo collection.

worldview1 web

+ Specifications

Design and Specifications
Launch Information

Date: September 18, 2007 Launch Vehicle: Delta 7920 (9 strap-ons) Launch Site: Vandenberg Air Force Base, California

Orbit Altitude: 496 kilometers
Type: Sun synchronous, 1:30 pm descending node
Period: 95 minutes
Mission Life

10-12 years, including all consumables and degradables
(e.g. propellant)

Spacecraft Size, Mass and Power

3.6 meters (12 feet) tall x 2.5 meters (8 feet) across,
7.1 meters (23 feet) across the deployed solar arrays
2290 kilograms (5038 lbs)
3.2 kW solar array, 100 Ahr battery

Sensor Bands
  • Panchromatic: 400 - 900 nm
Sensor Resolution
(GSD=Ground Sample Distance)
  • Panchromatic:
    • 50 cm GSD at nadir
    • 55 cm GSD at 20° off-nadir
Dynamic Range 11-bits per pixel
Swath Width 17.7 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

Accuracy: < 500 meters at image start and stop
Knowledge: Supports geolocation accuracy below

Retargeting Agility

Time to Slew: 200 kilometers: 10 seconds

Onboard Storage

2199 gigabits solid state with EDAC

Communications Image and Ancillary Data: 800 Mbps X-band
Housekeeping: 4, 16 or 32 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 angle)

Mono: 111 x 112 km (6 strips)
Stereo: 51 x 112 km (3 pairs)

Revisit Frequency
(at 40°N Latitude)

1.7 days at 1 meter GSD or less
5.4 days at 20° off-nadir or less (0.55 meter GSD)

Geolocation Accuracy
(CE90)

Demonstrated <4 m CE90 without ground control

   

+ Features

FeaturesBenefits

Very high resolution

  • 50 cm panchromatic at nadir
Acquire high quality satellite imagery for map creation, change detection, and image analysis

High image accuracy

  • Stable platform for precise location measurement
  • 3-axis stabilized, star tracker/IRU/reaction wheels, C/A Code GPS

Geolocate features to less than 5 m to create maps in remote areas, maximizing the utilty of ground control points

High image quality

  • Large field-of-view
  • High contrast (MTF)
  • High signal to noise ratio
  • 11-bit dynamic range

Extend the range of suitable imaging collection targets and enhance image interpretability

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