WorldView-4

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WorldView-4
Names GeoEye-2
Mission type Earth observation
Operator DigitalGlobe
Mission duration Planned: 10 to 12 years
Spacecraft properties
Bus LM-900[1]
Manufacturer Lockheed Martin Space Systems[1]
Launch mass 2,087 kg (4,601 lb)[2]
Dimensions 7.9 × 5.3 m (26 × 17 ft)[3]
Start of mission
Launch date 15 September 2016 (2016-09-15)[4]
Rocket Atlas V 401, AV-062[4]
Launch site Vandenberg SLC-3E[4]
Contractor United Launch Alliance
Orbital parameters
Reference system Geocentric
Regime Sun-synchronous[3]
Perigee 617–681 km (383–423 mi)[3][5]
Apogee 617–681 km (383–423 mi)[3][5]
Period 97 minutes[3]
Repeat interval 3 days[5]
Velocity 7.5 km/s (16,800 mph)[5]
Epoch Planned
Main telescope
Name GeoEye Imaging System-2
Diameter 1.1 m (3.6 ft)[6]
Wavelengths Panchromatic: 450-800 nm[3]
Multispectral: 655-920 nm[3]
Resolution Panchromatic: 0.31 m (12.2 in)[3]
Multispectral: 1.24 m (48.8 in)[3]
----
DigitalGlobe fleet
← WorldView-3

WorldView-4, previously known as GeoEye-2, is a planned third generation commercial Earth observation satellite scheduled to launch in September 2016. The spacecraft will be operated by DigitalGlobe. With a maximum resolution of 31 cm (12 in),[7] WorldView-4 will provide the highest resolution commercial imagery at the time of its launch, and will not be encumbered by the 50 cm (20 in) restriction imposed by the U.S. government on its predecessors.[8]

History

Work on GeoEye-2 began in October 2007 when commercial imagery company GeoEye selected ITT Corporation to begin work on long lead-time items for the satellite camera system.[9][10] In March 2010, an initial contract for construction of the spacecraft was awarded to Lockheed Martin Space Systems, which previously built the IKONOS imaging satellite.[11] At the time, GeoEye-2 was planned for launch in late 2012.[12] The spacecraft's preliminary design review was completed in November 2010, while its critical design review was completed in June 2011.[13][14]

Lockheed Martin issued a contract to ITT Corporation in August 2010 to continue work on the camera system.[10] Its critical design review was completed in March 2011.[15] The system was delivered to Lockheed in April 2012,[16] and was mated to the spacecraft bus the following month.[17]

DigitalGlobe agreed to purchase GeoEye in July 2012,[18] and finalized the merger in January 2013.[19] At the time, each company had a satellite being prepared for launch: WorldView-3 and GeoEye-2. Because WorldView-3 offered multiple short-wavelength infrared channels in addition to the standard panchromatic and multiwavelength channels, the company chose to proceed with its launch and to place GeoEye-2 into storage.[20]

In July 2014, DigitalGlobe announced that GeoEye-2 had been renamed to WorldView-4 to better match the company's branding, and that, due to a projected increase in product demand, the spacecraft's launch had been scheduled for mid-2016.[21][22]

Launch

WorldView-4 is scheduled for launch on 15 September 2016 from Vandenberg Air Force Base's Space Launch Complex 3E. It will launch aboard an Atlas V rocket in the 401 configuration, serial number AV-062, provided and administered by United Launch Alliance.[4]

Instrument

The spacecraft's telescope is called the GeoEye Imaging System-2,[23] designed and built by ITT Corporation.[16] The telescope mirror is 1.1 m (3.6 ft) in diameter.[6] It will be able to provide panchromatic images at a highest resolution of 0.31 meters per pixel (12.2 in/px), and multispectral images at 1.24 meters per pixel (48.8 in/px).[3] Multispectral imagery will be available in red, green, blue and near-infrared channels.[3]

References

  1. ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 4.2 4.3 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ 5.0 5.1 5.2 5.3 Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ 10.0 10.1 Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ 16.0 16.1 Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  18. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  19. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  20. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  21. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  22. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  23. ↑ Lua error in package.lua at line 80: module 'strict' not found.


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