Abstract
The use of rational functions has become a standard for very high-resolution satellite imagery (VHRSI). On the other hand, the overall geolocalization accuracy via direct georeferencing from on board navigation components is much worse than image ground sampling distance (predicted < 3.5 m CE90 for WorldView-3, whereas GSD = 0.31 m for panchromatic images at nadir). <br><br> This paper presents the georeferencing accuracy results obtained from a single WorldView-3 image processed with a bias compensated RPC camera model. Orientation results for an image collected over Milan are illustrated and discussed for both direct and indirect georeferencing strategies as well as different bias correction parameters estimated from a set of ground control points. Results highlight that the use of a correction based on two shift parameters is optimal for the considered dataset.
Highlights
1.1 The WorldView-3 systemWorldView-3 (Fig. 1) is the last satellite of DigitalGlobe’s constellation of very high resolution satellites, which include IKONOS, QuickBird (October 18, 2001 - out of mission since 27.1.2105), WorldView-1, WorldView-2 and GeoEye-1
The swath width of 13.1 km at nadir coupled with very high scan acquisition rate (20,000 lines/second) for panchromatic images allows the acquisition of data for a large variety of applications such as land use and planning, telecommunications, infrastructure planning, environmental assessment, marine studies, mapping and surveying, civil engineering, mining and exploration, oil and gas, agriculture, etc
DATASET DESCRIPTION The bias-compensated RPC camera model was used to refine the RPCs of a WV-3 image provided by DigitalGlobe, which was acquired over Milan (Italy) on 15th Aug 2015
Summary
WorldView-3 (Fig. 1) is the last satellite of DigitalGlobe’s constellation of very high resolution satellites, which include IKONOS (launched September 24, 1999 - out of mission since 31.3.2015), QuickBird (October 18, 2001 - out of mission since 27.1.2105), WorldView-1 (launched September 2007), WorldView-2 (launched October 2009) and GeoEye-1 (launched September 6th, 2008). WorldView-3 was launched by DigitalGlobe (https://www.digitalglobe.com/) on August 2014, from Vandenberg Air Force Base in California. It collects images from an altitude of 617 km with a global capacity of 680,000 km per day. The system carries an atmospheric monitoring instrument called CAVIS with 12 bands (desert clouds, aerosol-1, aerosol-2, aerosol-3, green, water-1, water-2, water-3, NDVI-SWIR, cirrus, snow) and a ground resolution of 30 m at nadir. WorldView-3 collects shortwave infrared (SWIR) imagery in eight-bands, offered on a commercial satellite for the first time.
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