Data format: Raster Dataset - TIFF
File or table name: maui_cf.tif
Coordinate system: Universal Transverse Mercator
Theme keywords: imageryBaseMapsEarthCover
| Landsat 7 ETM/1G Satellite Imagery | |
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Data format: Raster Dataset - TIFF File or table name: maui_cf.tif Coordinate system: Universal Transverse Mercator Theme keywords: imageryBaseMapsEarthCover |
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Abstract:
Cloud-free Landsat mosaic of the islands of Maui and Kahoolawe.
Landsat 7 ETM (enhanced thematic mapper) is a polar orbiting 8 band multispectral satellite-borne sensor. The ETM+ instrument provides image data from eight spectral bands. The spatial resolution is 30 meters for the visible and near-infrared (bands 1-5 and 7). Resolution for the panchromatic (band 8) is 15 meters, and the thermal infrared (band 6) is 60 meters. The approximate scene size is 170 x 183 kilometers (106 x 115 miles). A Nadir-looking system, the sensor has provided continuous coverage since July 1999, with a 16-day repeat cycle.The Level 1G product is radiometrically and geometrically corrected(systematic) to the user-specified parameters including output map projection, image orientation, pixel grid-cell size, and resampling kernel. The correction algorithms model the spacecraft and sensor using data generated by onboard computers during imaging. Sensor, focal plane, and detector alignment information provided by the Image Assessment System (IAS) in the Calibration Parameter File (CPF) is also used to improve the overall geometric fidelity. The resulting product is free from distortions related to the sensor (e.g., jitter, view angle effect), satellite (e.g., attitude deviations from nominal), and Earth (e.g., rotation, curvature). Residual error in the systematic L1G product is less than 250 meters (1 sigma) in flat areas at sea level. The systematic L1G correction process does not employ ground control or relief models to attain absolute geodetic accuracy. |
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Cloud-free Landsat mosaic of the islands of Maui and Kahoolawe. Landsat 7 ETM (enhanced thematic mapper) is a polar orbiting 8 band multispectral satellite-borne sensor. The ETM+ instrument provides image data from eight spectral bands. The spatial resolution is 30 meters for the visible and near-infrared (bands 1-5 and 7). Resolution for the panchromatic (band 8) is 15 meters, and the thermal infrared (band 6) is 60 meters. The approximate scene size is 170 x 183 kilometers (106 x 115 miles). A Nadir-looking system, the sensor has provided continuous coverage since July 1999, with a 16-day repeat cycle.The Level 1G product is radiometrically and geometrically corrected(systematic) to the user-specified parameters including output map projection, image orientation, pixel grid-cell size, and resampling kernel. The correction algorithms model the spacecraft and sensor using data generated by onboard computers during imaging. Sensor, focal plane, and detector alignment information provided by the Image Assessment System (IAS) in the Calibration Parameter File (CPF) is also used to improve the overall geometric fidelity. The resulting product is free from distortions related to the sensor (e.g., jitter, view angle effect), satellite (e.g., attitude deviations from nominal), and Earth (e.g., rotation, curvature). Residual error in the systematic L1G product is less than 250 meters (1 sigma) in flat areas at sea level. The systematic L1G correction process does not employ ground control or relief models to attain absolute geodetic accuracy.
The Landsat Project is a joint initiative of the U.S Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA) to gather Earth resource data using a series of satellites. NASA was responsible for developing and launching the spacecrafts, while the USGS is responsible for flight operations, maintenance, and management of all ground data reception, processing, archiving, product generation, and distribution. The primary objective of the Landsat Project is to ensure a collection of consistently calibrated Earth imagery. Landsat's Global Survey Mission is to establish and execute a data acquisition strategy that ensures repetitive acquisition of observations over the Earths land mass, coastal boundaries, and coral reefs; and to ensure the data acquired are of maximum utility in supporting the scientific objectives of monitoring changes in the Earths land surface and associated environment.
Sensor Type - Multispectral Sensor Name - Landsat 7 Sensor Homepage URL - http://landsat7.usgs.gov Sensor Platform - Satellite Sensor Orbit Type - Near-polar, Sun-synchronous, Near-circular Sensor Revisit Frequency - 16 days Sensor Launch Date - 19990415 Nominal Azimuth Nominal Elevation Nominal Altitude - 705 kilometers Incidence Angle (look) - 98.2 degrees Sun Angle Azimuth Sun Angle Elevation Orbit Direction Mode Name - Normal, Thermal, Panchromatic Mode Description - Normal (Data for bands 1-4 are collected at the prime focal plane and are transmitted to ground on data channel 1. Data for bands 5 and 7 are collected at the cold focal plane and are transmitted to ground on data channel 1 and data channel 2.), Thermal (Data for band 6 are collected at the cold focal plane and are transmitted to ground on data channel 1.), Panchromatic (Panchromatic data are collected on the prime focal plane and are transmitted to ground on data channel 2.) Mode Resolution - Normal (30), Thermal (60), Panchromatic (15) Mode Resolution Units - Meters Mode Resolution Notes Swath Width - 183 Swath Width Units - Kilometers Swath Width Notes Stereo Stereo Pair GUID Day or Night Overlap Path Num Row Num Weather Conditions Flight Line ID Flight Frame ID Film Roll ID Original Frame Size Scan DPI Beam Position Name Beam Incidence Angle Nominal Beam Incidence Angle Low Beam Incidence Angle High Band ID - 1-8 Band Name - 1 (Blue), 2 (Red), 3 (Green), 4 (NIR), 5 (SWIR), 6 (Thermal SWIR), 7 (SWIR), 8 (Panchromatic) Band Wavelength Low - 1 (.450), 2 (.525), 3 (.630), 4 (.775), 5 (1.550), 6 (10.400), 7 (2.090), 8 (.520) Band Wavelength High - 1 (.515), 2 (.605), 3 (.690), 4 (.900), 5 (1.750), 6 (12.500), 7 (2.350), 8 (.900) Band Wavelength Units - micrometers Band Frequency Band Frequency Units Band Description - 1 (Designed for water body penetration, soil and vegetation discrimination, and forest-type mapping), 2 (Matches the green reflectance peak of vegetation. Recommended for vegetation discrimination and plant vigor.), 3 (This band operates in the chlorophyll absorption region and is best for detecting roads, bare soils, and vegetation types.), 4 (This band is used to estimate biomass. Although it separates water bodies from vegetation and discriminates soil moisture, it is not as effective as TM3 for road identification.), 5 (Considered to be the best single band overall. It discriminates roads, bare soils, and water. It also provides a good contrast between different types of vegetation and has excellent atmospheric and haze penetration.), 6 (This band responds to thermal radiation emitted by the target. Thermal radiation is closely related to soil moisture and the height and temperature of vegetation and is best for measuring plant heat stress and thermal mapping. Unlike the other bands, the thermal infrared band has a resolution of 120 m.), 7 (This band is useful for discriminating mineral and rock types and for interpreting vegetation cover and soil moisture.), 8 (The panchromatic band enhances the capability to distinguish tree density classes -- an important development, because density directly affects fuel moisture content and wind speeds near the ground.)
ground condition
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590 Lipoa Parkway, Suite 259
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The nominal resolution is achieved within 30 degrees of nadir. Geodetic accuracy is monitored using calibration scenes containing ground control points. Scenes are first radiometrically and geometrically corrected. Control point locations are then measured on the processed imagery and compared to known ground locations. Any terrain effects are removed analytically in the comparison. The post-calibration geodetic accuracy of systematic ETM+ products is approximately 50 meters which is much better than 250 meter specification placed on the system. Band-to-band registration measures the relative alignment of the eight ETM+ spectral bands after processing to Level 1Gs. Measured registration between the primary and cold focal planes in the line direction is typically 0.08-0.10 pixels, well below the design specification limit of 0.17 pixels. Image registration accuracy is measured using cloud-free images of two separate calibration sites. One meter resolution DOQs were mosaicked and reduced to 15 meter resolution. The image registration assessment was performed in two ways. First, the ETM+ images were compared against the DOQ reference images. This provides a measure of image distortion relative to an absolute reference. The 1 sigma accuracy for registration to DOQs is 4.3 meters along scan and 4.2 meters across scan. Second, two ETM+ scenes were cross correlated. This provides a measure of image distortion that changes scene-to-scene although systematic calibration distortions may cancel out. The 1 sigma accuracy for ETM+ to ETM+ registration is 3.2 meters along scan and 1.9 meters across scan.
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Vendor Product Name - Enhanced Thematic Mapper Plus (ETM+) Vendor Product Description - The ETM+ instrument provides image data from eight spectral bands (band designations). The spatial resolution is 30 meters for the visible and near-infrared (bands 1-5 and 7). Resolution for the panchromatic (band 8) is 15 meters, and the thermal infrared (band 6) is 60 meters. The approximate scene size is 170 x 183 kilometers (106 x 115 miles). Processing Level Name - 1G Processing Level Description - Systematic Correction (Level 1G) includes both radiometric and geometric correction. Image data is provided in rescaled 8-bit (DN) values. The scene will be rotated, aligned, and georeferenced to a user-defined map projection. Geometric accuracy of the systematically corrected product should be within 250 meters (1 sigma) for low-relief areas at sea level. PDC Processing - Multiple Landsat scenes were mosaiced as part of the Pacific Diaster Center/InfoMart cloud-free project. The PDC received jpeg images from Infomart in July 2003. ENVI software was used to convert the jpeg images to GeoTiff format. Kauai - Niihau Path: 65 Row: 45 Dates: 19990811, 19991115, 20000102, 20000626 Path: 66 Row: 45 Dates: 19990802, 20000109, 20000617, 20000921 Oahu Path: 64 Row: 45 Dates: 20000212, 20000603 Path: 65 Row: 45 Dates: 20000219 Molokai - Lanai Path: 64 Row: 45 Dates: 20000212, 20000603 Path: 64 Row: 46 Dates: 20000127 Maui - Kahoolawe, Hawaii (Big Island) Path: 63 Row: 46 Dates:19990712, 19990728, 19990813, 19990829, 19990914, 19990930, 19991016, 19991101, 19991203, 19991219, 20000104, 20000120, 20000205, 20000221 Hawaii (Big Island) Path: 62 Row: 47 Dates: 19990721, 19990806, 20000214 Path: 63 Row: 47 Dates: 19990728, 19990829, 20000221 Path: 65 Row: 46 Dates: 19990822, 19991009
590 Lipoa Parkway, Suite 259
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590 Lipoa Parkway, Suite 259