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IKONOS_Sensor.pptx
IKONOS_Sensor.pptx
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GPY 370 Sensor Presentation IKONOS
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Overview of System ● First U.S. commercial high resolution satellite ● Operated by DigitalGlobe and was successfully launched on September 24, 1999 at Vandenberg Air Force Base, California o Each international affiliate operates their own ground station ● The overall objective was to offer commercial high resolution imagery with excellent location knowledge in near real-time and offline
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First IKONOS image taken of Washington D.C. http://fas.org/irp/imint/space_imaging.htm
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Characteristics ● Orbit Elements: o Altitude → 423 miles / 681 kilometers o Orbital Period → 98 minutes, 14.6 revolutions per day o Inclination → 98.1 degrees o Swath Width → 11 kilometers Linear array technology / pushbroom
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Key Parameters of IKONOS ● Four multispectral bands at a spatial resolution of 4 meters as well as a 1 meter spatial resolution panchromatic band o The panchromatic and multispectral bands can be combined to produce “pan-sharpened” multispectral imagery with an effective resolution of 1 meter Pan: 0.45 -0.90 1 (Blue): 0.45 - 0.52 2 (Green): 0.52 - 0.60 3 (Red): 0.63 - 0.69 4 (IR): 0.76 - 0.90 ● Radiometric Resolution → collects data with an 11-bit sensitivity and is delivered in unsigned 16-bit data format ● Temporal Resolution → 3 days
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Data and Products ● Imagery products provided in six levels: Geo, Standard Ortho, Reference, Pro, Precision, PrecisionPlus ● Commercial data available to be purchased o purchased by sq. km, so prices vary, but you only pay for exact area of interest Geographic Coverage
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Image Reference System ● World Geodetic System (WGS) 84 ○ Defined with respect to station location globally ○ Helps for global survey ○ Spheroidal Reference Surface (Reference Ellipsoid/Datum) Coordinate of Origin: Earth’s center of mass with an error of 2 cm http://en.wikipedia.org/wiki/World_Geodetic_System#mediaviewer/File:WGS_84_reference_frame.png
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Data Applications ● Urban and Rural applications o Mapping of natural resources and natural disasters o Agriculture and forestry analysis o Mining, engineering, construction, and change detection ● Military and Homeland Security o Department of Defense
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Future Use Continued use for case by case natural disasters and land surveillance