Английская Википедия:GeoEye-1

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GeoEye-1 is a high-resolution Earth observation satellite owned by Maxar Technologies (formerly DigitalGlobe), launched in September 2008. The satellite was acquired in the 2013 purchase of GeoEye.

History

On 1 December 2004, General Dynamics C4 Systems announced it had been awarded a contract worth approximately Шаблон:US$ 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 Шаблон:Convert panchromatic and Шаблон:Convert multispectral imagery at nadir in Шаблон:Convert swaths. The spacecraft is in a Sun-synchronous orbit at an altitude of Шаблон:Convert 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 Шаблон:Convert, that resolution was only available to the U.S. government. Google has access to details of Шаблон:Convert. Prior maximum commercial imagery was Шаблон:Convert.

The National Geospatial-Intelligence Agency and Google paid a combined Шаблон:US$ for the satellite and upgrades to GeoEye's four ground stations.

2009 anomaly

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 limit the range of movement of GeoEye-1Шаблон:'s downlink antenna, which may in turn affect GeoEye-1Шаблон:'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.

See also

• 2008 in spaceflight

External links

• GeoEye-1 at Digitalglobe.com