Όμιλος Εταιρειών AVMap -

Φέρνοντας επανάσταση στο χώρο των δορυφορικών απεικονίσεων, ο WorldView-2 εκτοξεύθηκε τον Οκτώβριο του 2009. Ο τρίτος δορυφόρος του στόλου της DigitalGlobe λαμβάνει εικόνες με ανάλυση 46 εκατοστών και έχει τη δυνατότητα να συλλάβει 8 διαφορετικά χρώματα (σε αντίθεση με τους συμβατικούς δορυφόρους που αποδίδουν μόνο 4).

Ανασκόπηση

Εταιρία: DigitalGlobe
Εκτόξευση: 08/10/2009
Ύψος τροχιάς: 770Km
Ανάλυση: 46cm παγχρωματικό / 1,84m πολυφασματικό (8 χρώματα)
Πλάτος εικόνας: 17,6Km

Παραδείγματα

Τεχνικά Χαρακτηριστικά

Design and Specifications
Launch Information	Date: October 8, 2009 Launch Vehicle: Delta 7920 (9 strap-ons) Launch Site: Vandenberg Air Force Base, California
Orbit	Altitude: 770 kilometers Type: Sun synchronous, 10:30 am descending node Period: 100 minutes
Mission Life	7.25 years, including all consumables and degradables (e.g. propellant)
Spacecraft Size, Mass & Power	4.3 meters (14 feet) tall x 2.5 meters (8 feet) across, 7.1 meters (23 feet) across the deployed solar arrays 2800 kilograms (6200 pounds) 3.2 kW solar array, 100 Ahr battery
Sensor Bands	Panchromatic 8 Multispectral: 4 standard colors: blue, green, red, near-IR 1 4 new colors: coastal, yellow, red edge, near-IR 2
Sensor Resolution (GSD = Ground Sample Distance)	Panchromatic: 0.46 meters GSD at nadir 0.52 meters GSD at 20° off-nadir Multispectral: 1.84 meters GSD at nadir 2.08 meters GSD at 20° off-nadir (note that imagery must be re-sampled to 0.5 meters for non-US Government customers)
Dynamic Range	11-bits per pixel
Swath Width	16.4 kilometers at nadir
Attitude Determination and Control	3-axis stabilized Actuators: Control Moment Gyros (CMGs) Sensors: Star trackers, solid state IRU, GPS
Pointing Accuracy & Knowledge	Accuracy: < 500 meters at image start and stop Knowledge: Supports geolocation accuracy below
Retargeting Agility	Acceleration: 1.5 deg/s/s Rate: 3.5 deg/s Time to Slew: 200 kilometers: 10 seconds
Onboard Storage	2199 gigabits 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 Viewing Angle / Accessible Ground Swath	Nominally +/-45° off-nadir = 1355 km wide swath Higher angles selectively available
Per Orbit Collection	524 gigabits
Max Contiguous Area Collected in a Single Pass	65.6 x 110 km mono 48 x 110 km stereo
Revisit Frequency	1.1 days at 1 meter GSD or less 3.7 days at 20° off-nadir or less (0.52 meter GSD)
Geolocation Accuracy (CE 90)	Specification of 6.5m CE90, with predicted performance in the range of 4.6 to 10.7 meters (15 to 35 feet) CE90, excluding terrain and off-nadir effects With registration to GCPs in image : 2.0 meters (6.6 feet)