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Collection:
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NASA Planetary Photo Journal Collection
Collection
NASA Planetary Photo Journal Collection
Collection
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Title:
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Upolu Island, Western Samoa
Title
Upolu Island, Western Samoa
Title
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Original Caption Released with Image:
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Island nations in the South Pacific Ocean experience natural disasters associated with typhoons, and with their proximity to the Pacific Ocean's "Ring of Fire." This radar image shows most of the northern coast of the island of Upolu in the nation of Western Samoa. Disaster managers use digital elevation models (DEMs) generated from radar data to assist in research toward disaster mitigation and management. Geologists also use DEM data of volcanic features, such as the line of circular craters in this image, to study eruption rates and volumes, and volcanic landform evolution. The capital of Western Samoa, Apia, is in the lower left of the image.
Angular black areas in the image are areas where steep topography causes holes in the data; these holes can be filled in by collecting data at other look directions. Color represents topography and intensity represents across-section of the radar backscatter. Since rough areas return more of the incident signal, they appear brighter on the image than relatively smooth areas, such as the ocean surface , along the left side of the image.
This image was acquired by the AIRborne Synthetic Aperture (AIRSAR) radar instrument aboard a DC-8 aircraft operated out of NASA's Dryden Flight Research Center. AIRSAR collects fully polarimetric data at three wavelengths; C-band(0.057 meter), L-band (0.25 meter) and P-band (0.68 meter). AIRSAR also collects cross-track and along track interferometric data that results in topographic measurements and motion detection, respectively.
This image was collected during the Pacific Rim mission, a three-month mission from July to October 2000 that collected data at over 200 sites in eighteen countries and territories around the Pacific Rim. AIRSAR is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Earth Science Enterprise,Washingto n, D.C.
Size: 10 km (6.2 miles) x 63 km (37.3 miles)
Location: 14.16 deg. North lat., 171.75 deg. West
Orientation: North towards the left side of image
Date Acquired: August 10, 2000
Original_Caption_Rel eased_with_Image
Island nations in the South Pacific Ocean experience natural disasters associated with typhoons, and with their proximity to the Pacific Ocean's "Ring of Fire." This radar image shows most of the northern coast of the island of Upolu in the nation of Western Samoa. Disaster managers use digital elevation models (DEMs) generated from radar data to assist in research toward disaster mitigation and management. Geologists also use DEM data of volcanic features, such as the line of circular craters in this image, to study eruption rates and volumes, and volcanic landform evolution. The capital of Western Samoa, Apia, is in the lower left of the image.
Angular black areas in the image are areas where steep topography causes holes in the data; these holes can be filled in by collecting data at other look directions. Color represents topography and intensity represents across-section of the radar backscatter. Since rough areas return more of the incident signal, they appear brighter on the image than relatively smooth areas, such as the ocean surface , along the left side of the image.
This image was acquired by the AIRborne Synthetic Aperture (AIRSAR) radar instrument aboard a DC-8 aircraft operated out of NASA's Dryden Flight Research Center. AIRSAR collects fully polarimetric data at three wavelengths; C-band(0.057 meter), L-band (0.25 meter) and P-band (0.68 meter). AIRSAR also collects cross-track and along track interferometric data that results in topographic measurements and motion detection, respectively.
This image was collected during the Pacific Rim mission, a three-month mission from July to October 2000 that collected data at over 200 sites in eighteen countries and territories around the Pacific Rim. AIRSAR is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Earth Science Enterprise,Washingto n, D.C.
Size: 10 km (6.2 miles) x 63 km (37.3 miles)
Location: 14.16 deg. North lat., 171.75 deg. West
Orientation: North towards the left side of image
Date Acquired: August 10, 2000
Original Caption Released with Image
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Image Credit:
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NASA/JPL
Image_Credit
NASA/JPL
Image Credit
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Produced By:
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JPL
Produced_By
JPL
Produced By
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Mission:
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Airborne Synthetic Aperture Radar (AIRSAR)
Mission
Airborne Synthetic Aperture Radar (AIRSAR)
Mission
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Spacecraft:
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NASA DC-8 Aircraft
Spacecraft
NASA DC-8 Aircraft
Spacecraft
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Target Name:
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Earth
Target_Name
Earth
Target Name
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Is a satellite of:
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Sol (our sun)
Is_a_satellite_of
Sol (our sun)
Is a satellite of
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Instrument:
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AirSAR
Instrument
AirSAR
Instrument
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Product Size:
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2401 samples x 11984 lines
Product_Size
2401 samples x 11984 lines
Product Size
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Primary Data Set:
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AIRSAR
Primary_Data_Set
AIRSAR
Primary Data Set
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Producer ID:
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N/A
Producer_ID
N/A
Producer ID
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facet_what:
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Sun
facet_what
Sun
facet_what
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facet_what:
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Earth
facet_what
Earth
facet_what
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facet_what:
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AirSAR
facet_what
AirSAR
facet_what
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facet_what:
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AIRSAR
facet_what
AIRSAR
facet_what
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facet_what:
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Airborne Synthetic Aperture Radar
facet_what
Airborne Synthetic Aperture Radar
facet_what
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facet_what:
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NASA DC-8 Aircraft
facet_what
NASA DC-8 Aircraft
facet_what
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facet_where:
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Jet Propulsion Laboratory
facet_where
Jet Propulsion Laboratory
facet_where
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facet_where:
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Pacific Ocean
facet_where
Pacific Ocean
facet_where
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facet_where:
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Washington
facet_where
Washington
facet_where
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facet_where:
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Samoa
facet_where
Samoa
facet_where
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facet_where:
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Apia
facet_where
Apia
facet_where
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facet_where:
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Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
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facet_where:
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Washington, D.C.
facet_where
Washington, D.C.
facet_where
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facet_where:
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Dryden Flight Research Center (DFRC)
facet_where
Dryden Flight Research Center (DFRC)
facet_where
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facet_when:
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October 2000
facet_when
October 2000
facet_when
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facet_when:
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August 10, 2000
facet_when
August 10, 2000
facet_when
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facet_when_year:
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2000
facet_when_year
2000
facet_when_year
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Image #:
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PIA02854
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UID:
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SPD-PHOTJ-PIA02854
UID
SPD-PHOTJ-PIA02854
UID
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orignial url:
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orignial_url
orignial url
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