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- 992cb370-d2d0-4a9f-a4d4-179f140f505a definition "GIS is a pushbroom imaging system whose basic elements are the optics subsystem (telescope assembly), the focal plane assembly (CCD detector), and the digital electronics subsystem. The optics subsystem employs a TMA (Three Mirror Anastigmatic) telescope design with a primary mirror aperture of 1.1 m in diameter. Three mirrors are used to image and focus the light, and two additional mirrors to direct the image to the FPA (Focal Plane Assembly). The telescope is designed to give a near-perfect (diffraction limited) image to the FPA and to convert the analog pixels into digitized signals. The FPA consists of an array of CCD detectors with 8 µm pixel size for PAN and 32 µm pixel size for multispectral imagery. ITT has included an outer barrel and door assembly to help protect the telescope and maintain its thermal environment. Imager type Pushbroom imager. Lline scan imaging system with TDI (Time Delay Integration) capability Imaging mode Panchromatic (Pan) Multispectral (MS) Spectral range 450-900 nm 450-510 nm (blue) 520-580 nm (green) 655-690 nm (red) 780-920 nm (near infrared) Spatial resolution at nadir 0.41 m GSD 1.64 m GSD Swath width 15.2 km (multiple adjoining paths can be imaged in a target area in a single orbit pass due to S/C agility) Detectors Pan: Si CCD array (8 µm pixel size) with a row of > 35,000 detectors MS: Si CCD 4 arrays (32 µm pixel size) with a row of > 9,300 detectors Data quantization 11 bit Geolocation accuracy of imagery ≤ 3 m (using a GPS receiver, a gyroscope and a star tracker) without any GCP (Ground Control Points) Optics TMA telescope (5-element modified Cassegrain optical design) Aperture diameter of 1.1 m, focal length = 13.3 m, f/12 FOV (Field of View) > 1.28º Instrument size 3 m tall (the volume is 5.3 m3) Total instrument mass 452 kg" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a id "1655163" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_id 4f81c61c-f100-4bc4-9664-d9b70d2f162f @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_id 6015ef7b-f3bd-49e1-9193-cc23db566b69 @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_id 72227178-bb4c-4ff5-98a3-f976aa3f3714 @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_id b2140059-b3ca-415c-b0a7-3e142783ffe8 @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_id d322ae9d-bde0-448f-948d-777aef096eb6 @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_label "Cameras" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_label "Earth Remote Sensing Instruments" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_label "Instruments" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_label "Passive Remote Sensing" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a path_label "Photon/Optical Detectors" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a prefLabel "GIS" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a reference "https://earth.esa.int/web/eoportal/satellite-missions/g/geoeye-1" @default.
- 992cb370-d2d0-4a9f-a4d4-179f140f505a tag "Instruments" @default.