|Mission type||Earth observation|
Planned: 7 years |
Elapsed: 9 years, 10 months
|Launch mass||1,955 kilograms (4,310 lb)|
|Start of mission|
|Launch date||6 September 2008, 18:50:57UTC|
|Rocket||Delta II 7420-10, D-335|
|Launch site||Vandenberg SLC-2W|
|Contractor||Boeing / United Launch Alliance|
|Semi-major axis||7,057.01 kilometers (4,385.02 mi)|
|Perigee||678 kilometers (421 mi)|
|Apogee||693 kilometers (431 mi)|
|Epoch||25 January 2015, 04:49:00 UTC|
|Diameter||1.1 m (3.6 ft)|
|Focal length||13.3 m (44 ft)|
Panchromatic: 41 cm (16 in) |
Multispectral: 165 cm (65 in)
|Bandwidth||X band: 150 or 740 Mbps|
On 1 December 2004, General Dynamics C4 Systems announced it had been awarded a contract worth approximately US$209 million to build the OrbView-5 satellite. Its sensor is designed by the ITT Exelis.
The satellite, now known as GeoEye-1, was originally scheduled for launch in April 2008 but lost its 30-day launch slot to a U.S. government mission which had itself been delayed. It was rescheduled for launch 22 August 2008 from Vandenberg Air Force Base aboard a Delta II launch vehicle. The launch was postponed to 4 September 2008, due to unavailability of the Big Crow telemetry-relay aircraft. It was delayed again to 6 September because Hurricane Hanna interfered with its launch crews.
The launch took place successfully on 6 September 2008 at 18:50:57 UTC. The GeoEye-1 satellite separated successfully from its Delta II launch vehicle at 19:49 UTC, 58 minutes and 56 seconds after launch.
Specifications and operation
GeoEye-1 provides 0.41 m (16 in) panchromatic and 1.65 m (5.4 ft) multispectral imagery in 15.2 km (9.4 mi) swaths. The spacecraft is intended for a sun-synchronous orbit at an altitude of 681 km (423 mi) and an inclination of 98 degrees, with a 10:30 a.m. equator crossing time. GeoEye-1 can image up to 60 degrees off nadir. It is operated out of Dulles, Virginia.
At the time of its launch, GeoEye-1 was the world's highest resolution commercial Earth-imaging satellite. GeoEye-1 was manufactured in Gilbert, Arizona, by General Dynamics and the first image was returned on 7 October of Kutztown University in Pennsylvania.
Google, which had its logo on the side of the rocket, has exclusive online mapping use of its data. While GeoEye-1 is capable of imagery with details the size of 41 centimeters per pixel (16 in/px), that resolution was only available to the U.S. government. Google has access to details of 50 cm per pixel (20 in/px). Prior maximum commercial imagery was 60 cm (24 in).
In December 2009 GeoEye announced it had suspended imagery collections by GeoEye-1 for a few days, citing an irregularity in the downlink antenna.
The irregularity appears to have contributed to limiting the range of GeoEye-1's downlink antenna movement, which may in turn affect GeoEye-1's ability to image and downlink simultaneously," GeoEye said at a press conference. However, the satellite continued with normal operations shortly thereafter, though with diminished simultaneous imaging-and-downlink capability for non-U.S. clients.
- "UCS Satellite Database". Union of Concerned Scientists. 1 September 2013. Retrieved 22 January 2014.
- "GeoEye 1". Gunter's Space Page. Retrieved 13 October 2016.
- McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 22 January 2014.
- Ray, Justin (6 September 2008). "Delta 335: Mission Status Center". Spaceflight Now.
- Peat, Chris (25 January 2015). "GEOEYE 1 - Orbit". Heavens-Above. Retrieved 25 January 2015.
- Moos, Warren; Eisenstein, Daniel (30 January 2007). "Advanced Dark Energy Physics Telescope (ADEPT)" (PDF). National Academies. Archived from the original (PDF) on 9 November 2008.
- "General Dynamics to Build Satellite to Improve U.S. Government Access to High-Resolution Earth Imagery". General Dynamics.
- "GeoEye-1 Launch Details". GeoEye. Archived from the original on 17 October 2008.
- Restatement Pulls GeoEye's Goals Back Down to Earth
- Justin Ray. "Delta 2 rocket launch of GeoEye craft postponed". Retrieved 14 August 2008.
- Justin Ray. "Delta 2-335 Mission Status Center". Retrieved 5 September 2008.
- "GeoEye-1 Launch Continues On Track". Seeking Alpha. 11 July 2008.
- "Google's Super Satellite Captures First Image". Wired. 7 October 2008.
- Google to buy GeoEye satellite imagery -cnet.com - August 29, 2008
- "GeoEye says satellite glitch could hit 2010 revenue". Reuters. 17 December 2009.
- "GeoEye-1". eoPortal. European Space Agency. Retrieved 13 October 2016.
- GeoEye-1 at Digitalglobe.com