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QuickBird
The QuickBird satellite is the first in a constellation of spacecraft that DigitalGlobe is developing that offers highly accurate, commercial high-resolution imagery of Earth. QuickBird’s global collection of panchromatic and multispectral imagery is designed to support applications ranging from map publishing to land and asset management to insurance risk assessment.
Today, DigitalGlobe’s QuickBird spacecraft is able to offer sub-meter resolution imagery, high geolocational accuracy, and large on-board data storage.
Moreover, we are able to populate and update our digitalglobe.com archive at unprecedented speed because QuickBird’s system features allow us to efficiently collect over 75 million square kilometers of imagery data annually.
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Features
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Benefits
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High resolution
- 61 cm (2 ft) panchromatic at nadir
- 2.4 m (8 ft) multispectral at nadir
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Acquire high-quality satellite imagery for map creation, change detection, and image analysis
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Great image accuracy
- Stable platform for precise location measurement
- 3-axis stabilized, star tracker/IRU/reaction wheels, C/A Code GPS
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Geolocate features to within 23 meters (75.5 feet) and create maps in remote areas without the use of ground control points
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Fast large-area collection
- 16.5 km width imaging swath
- 128 Gbits on-board image storage capacity
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Collect a greater supply of frequently updated global imagery products more quickly than competitive systems
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High image quality
- Off-axis unobscured design of QuickBird's telescope
- Large field-of-view
- High contrast (MTF)
- High signal to noise ratio
- 11 bit dynamic range
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Extend the range of suitable imaging collection targets and enhance image interpretability because images can be acquired at even the lowest light levels without sacrificing image quality
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Quantization
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11 bits
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Design and Specifications
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Launch Information
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Date: October 18, 2001
Launch Window: 1851-1906 GMT (1451-1506 EDT)
Launch Vehicle: Delta II
Launch Site: SLC-2W, Vandenberg Air Force Base, California
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Orbit
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Altitude: 450 km, 98 degree, sun-synchronous inclination
Revisit frequency: 2-3 days depending on latitude
Viewing angle: Agile spacecraft - in-track and cross-track pointing
Period: 93.4 minutes
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Per Orbit Collection
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~128 gigabits (approximately 57 single area images)
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Swath Width & Area Size
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Nominal swath width: 16.5 kilometers at nadir Accessible ground swath: 544 km centered on the satellite ground track (to ~30° off-nadir) Areas of interest
- Single Area: 16.5 km x 16.5 km
- Strip: 16.5 km x 115 km
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Metric Accuracy
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23 meter circular error, 17 meter linear error (without ground control)
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Sensor Resolution & Spectral Bandwidth
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Panchromatic
- 61 centimeter (2 ft) Ground Sample Distance (GSD) at nadir
- Black & White: 445 to 900 nanometers
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Multispectral
- 2.4 meter (8 ft) GSD at nadir
- Blue: 450 - 520 nanometers
- Green: 520 - 600 nanometers
- Red: 630 - 690 nanometers
- Near-IR: 760 - 900 nanometers
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Dynamic Range
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11-bits per pixel
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Communications
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Payload Data
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Housekeeping
- X-band from 4, 16 and 256 Kbps
- 2 Kbps S-band uplink
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ADCS Approach
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3-axis stabilized, star tracker/IRU/reaction wheels, C/A Code GPS
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Pointing and Agility
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Accuracy: less than 0.5 milliradians absolute per axis
Knowledge: less than 15 microradians per axis
Stability: less than 10 microradians per second
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Onboard Storage
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128 gigabits capacity
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Spacecraft
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Expected end of life: 2010
2100 pounds, 3.04-meters (10-ft) in length
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Pour de plus amples informations, contactez-nous.
Graphtech GIS - SIG Tunisie reste à votre entière disposition.
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