WorldView-1 Satellite Imagery

WorldView-1, launched September 2007, is the first of our next-generation satellites—the most agile satellites ever flown commercially. The high-capacity, panchromatic imaging system features half-meter resolution imagery. Operating at an altitude of 496 km, WorldView-1 has an average revisit time of 1.7 days and is capable of collecting over one million sq km per day of half-meter 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. WorldView-1 resides in a descending node of 1:30pm.

WorldView-1 Satellite Imagery

Features

  • Very high resolution

  • Industry-leading geolocation accuracy - Ultra-stable platform, high-precision attitude sensors and GPS

  • Highest capacity over a broad range of collection types (wider than any competitor)

  • Bi-directional scanning

  • Rapid retargeting using Control Moment Gyros (>2x faster than any competitor)

  • Direct downlink to customer sites available

  • World-class telescope
    - High contrast (MTF) and signal-to-noise ratio
    - Selectable Time Delay Integration (TDI) levels

  • Frequent revisits at high resolution

Benefits


  • Provides highly detailed imagery for precise map creation, change detection, and in-depth image analysis

  • Geolocate features to less than 5 meters to create maps in remote areas, maximizing the utility of available resources

  • Collects, stores, and downlinks a greater supply of frequently updated global imagery products than competitive systems

  • Stereoscopic collection on a single pass, ensures image continuity and consistency of quality

  • Extends the range of suitable imaging collection targets and enhances image interpretability

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 km 

Type: Sun synchronous 

Period: 95 min.


Mission Life

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


Spacecraft Size, Mass and Power

3.6 m (12 ft) tall x 2.5 m (8 ft) across 

7.1 m (23 ft) across the deployed solar arrays

2290 kg (5038 lbs.) 

3.2 kW solar array, 100 Ahr battery


Sensor Bands

Panchromatic: 400-900 nm


Sensor Resolution

50 cm Ground Sample Distance (GSD) at nadir

55 cm GSD at 20° off-nadir


Dynamic Range

11-bits per pixel


Swath Width

17.7 km 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 m at image start and stop

Knowledge: Supports geolocation accuracy below


Retargeting Agility

Time to Slew 200 km: 10 sec


Onboard Storage

2199 Gb 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 m GSD or less 

5.4 days at 20° off-nadir or less (0.55 m GSD)


Geolocation Accuracy (CE90)

Demonstrated <4.0 m CE90 without ground control


Capacity

1.3 million sq km per day


For more information or to order products and/or services visit our online store .  You can contact GeoWGS84 directly at (720) 702-4849 or info@geowgs84.com.

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