WorldView-2, launched October 2009, is the first high-resolution 8-band multispectral commercial satellite. Operating at an altitude of 770 km, WorldView-2 provides 46 cm panchromatic resolution and 1.85 m multispectral resolution.WorldView-2 has an average revisit time of 1.1 days and is capable of collecting up to 1 million km² of 8-band imagery per day.
The WorldView-2 system offers incredible accuracy, agility, capacity and spectral diversity.
WorldView-2 Specifications
Imaging Mode
Panchromatic
Multispectral
Spatial Resolution
0.46 meters
1.85 meters
Spectral Range
450-800 nm
400-450 nm (coastal)
450-510 nm (blue)
510-580 nm (green)
585-625 nm (yellow)
630-690 nm (red)
705-745 nm (red edge)
770-895 nm (near IR)
860-1040 nm (near IR)
Swath Width
17.7 km
Collection Elevation Angle
50-90 degrees; off-nadir < 35°
Dynamic Range
11 bits per pixel
Revisit Time
1.69 days at 45 degrees latitude
Orbital Altitude
770 km
Metric Accuracy
Demonstrated <3.5 m CE90 without ground control
WorldView-1
WorldView-1, launched September of 2007, is currently the most agile satellite ever flown commercially. The high-capacity, panchromatic imaging system features half-meter resolution imagery.
Operating at an altitude of 496 kilometers, WorldView-1 has an average revisit time of 1.7 days and is capable of collecting over one million square kilometers per day of half-meter imagery. The satellite is also equipped with state-of-the-art geolocation accuracy capabilities and exhibits stunning agility with rapid targeting and efficient in-track stereo collection.
WorldView-1 Specifications
Imaging Mode
Panchromatic
Spatial Resolution
0.50 meters
Spectral Range
400 - 900 nm
Swath Width
17.7 kmat nadir
Collection Capacity
1.3 million km² per day
Dynamic Range
11 bits per pixel
Revisit Frequency
1.7 days at 1 meter GSD or less
5.4 days at 20° off-nadir or less
Orbital Altitude
496 km
Metric Accuracy
Demonstrated <4.0 m CE90 without ground control
QuickBird
The QuickBird satellite offers highly accurate, commercial high-resolution imagery of Earth. QuickBird`s global collection of high resolution panchromatic and multispectral imagery is designed to support applications ranging from map publishing to land and asset management to insurance risk assessment.
DigitalGlobe completed an orbit raise in April of 2011 designed to extend the mission life of the QuickBird sensor. An operational altitude of 482 km was achieved with an expected gradual descent to 450 km by early 2013.
The QuickBird satellite offers sub-meter resolution imagery, high geolocational accuracy, and large on-board data storage.
QuickBird Specifications
Imaging Mode
Panchromatic
Multispectral
Spatial Resolution
0.65 meters
2.62 meters
Spectral Range
405-1053 nm
430-545 nm (blue)
466-620 nm (green)
590-710 nm (red)
715-918 nm (near IR)
Swath Width
18.0 km at nadir
Collection Capacity
200,000 km² per day
Dynamic Range
11 bits per pixel
Revisit Frequency
2.5 days at 1 meter GSD or less
5.6 days at 20 degrees off-nadir or less
Orbital Altitude
482 km
Metric Accuracy
23 m CE90 without ground control
For more information, please visit European Space Imaging website
RapidEye`s Ortho Product (Level 3A) offers the highest level of processing available. Radiometric, sensor and geometric corrections have been applied to the data. The product accuracy depends on the quality of the ground control and DEMs used.
Product Attribute
Description
Product Components
and Format
RapidEye Ortho image product consists of the following file components:
Image File – GeoTiff file that contains image data and geolocation information
Tile size is 25km (5000 lines) by 25km (5000 columns).
250 Mbytes per Tile for 5 bands at 5m pixel spacing.
Product Orientation
Map North up
Geometric Corrections
Sensor-related effects are corrected using sensor telemetry and a sensor model, bands are co-registered, and spacecraft-related effects are corrected using attitude telemetry and best available ephemeris data.
Ortho-rectified using GCPs and fine DEMs (30m to 90m posting)
Horizontal Datum
WGS84
Map Projection
Universal Transverse Mercator (UTM)
Resampling Kernel
Cubic Convolution (default), MTF, or Nearest Neighbor
Product Framing
Image Tile (Image tiles are based on a worldwide, 24km by 24km fixed grid system. To each 24km by 24km grid square, a 500m overlap is added to produce a 25km by 25km image tile. Image tiles are black-filled 1km beyond the order polygon used during order placement. Tiles only partially covered by an image take will be also be blackfilled in areas containing no valid image data.
For more information, please visit Rapideye website
