JERS-1_L1
1
2010-10-04T20:49:27Z
2014-01-15T06:31:28Z
JERS-1 Level 0 Data
JERS-1_LEVEL0
JERS-1 Level 0 Data
false
true
ASF
0
JERS-1 SAR data processed to a basic format for use in other processing streams to created specialized products.
ASF
ACTIVE
https://earthdata.nasa.gov/earth-observation-data/data-use-policy
License URL for data use policy
Data Use Policy
text/html
UTC
Gregorian
Continuous Range
1
false
1992-05-20T18:16:38Z
1998-10-11T00:57:08Z
ARCHIVER
ASF
907-474-5041
Telephone
uso@asf.alaska.edu
DISTRIBUTOR
ASF
907-474-5041
Telephone
uso@asf.alaska.edu
EARTH SCIENCE
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WETLANDS
JERS-1
Japanese Earth Resources Satellite-1
Spacecraft
SAR
Synthetic Aperture Radar
STD
Arctic
Antarctic
FLIGHT_LINE
STRING
Flight line identifies where the aircraft/instrument has flown to acquire data.
GROUP_ID
STRING
ID that helps ASF group products
OFF_NADIR_ANGLE
FLOAT
The angle the sensor points away from the satellite's nadir (off to the side). Larger angles correspond to imaging farther away from the satellite.
MD5SUM
STRING
Checksum
GRANULE_TYPE
STRING
Identifies the type of data by combining platform, beam mode type, and coverage (frame/swath)
ASCENDING_DESCENDING
STRING
Describes whether the satellite travel direction was ascending towards the north pole, or descending towards the south pole.
FAR_END_LAT
FLOAT
Latitude of the granule where imaging ended farthest from the satellite. For an ascending satellite, it locates the upper right corner of a north-oriented image.
INSAR_STACK_SIZE
INT
The number of SAR images over the same location in the entire ASF archive. Used for data that may be used for interferometry.
BEAM_MODE_TYPE
STRING
In most cases the same as beam mode. For Radarsat indicates both resolution and off-nadir pointing angle. Standard beam mode becomes ST1 though ST7 beammodetype, with ST7 pointing farthest from the satellite.
INSAR_BASELINE
FLOAT
The perpendicular distance between two satellites when they took the related two images. Useful for identifying image pairs to use for interferometry.
CENTER_FRAME_ID
STRING
ID of the center frame
CENTER_ESA_FRAME
INT
The Europenan Space Agency equivalent to the value in the FRAME_NUMBER field
ACQUISITION_DATE
STRING
Date the data was acquired by the satellite or aircraft + instrument.
MISSION_NAME
STRING
The sitenames where AIRSAR, AIMOSS, and UAVSAR acqusitions were taken.
CENTER_LON
FLOAT
Longitude of the center of the scene or frame.
NEAR_START_LAT
FLOAT
Latitude of the granule where imaging began nearest to the satellite. For an ascending satellite, it locates the lower left corner of a north-oriented image.
BEAM_MODE
STRING
The general type of active sensor used. Values indicate image resolution: such as standard, fine, wide, scansar wide, SM (strip mode), EW (extra wide). Or indicate resolution + polarization: FBS (fine beam dual polarization), FBD (fine beam dual pol). Or atypically the type of product: TOPSAR (high resolution DEM), RPI (repeat pass interferometry), XTI (across track interferometry). Or resolution and product type IW (interferometric wide).
BEAM_MODE_DESC
STRING
Text that describes the beam mode
PROCESSING_TYPE
STRING
Indicates the type of product, such as browse, metadata, L1, complex, amplitude, projected, terrain corrected.
PROCESSING_DESCRIPTION
STRING
Describes what the data was processed to. For example: low resolution terrain corrected ALOS data.
FRAME_NUMBER
INT
The designated frame or scene as defined by various space agencies (ESA, JAXA, CSA) each of which have their own scheme. The frame describes a box over the Earth at a fixed latitude. Combined with a path number (for longitude it identifies a specific piece of ground).
PROCESSING_LEVEL
STRING
Indicates how much processing has been done to the data: L1, L1.0 unprocessed; L1.1 single look complex; L1, L1.5 amplitude image
PROCESSING_DATE
STRING
The date the data was processed
NEAR_START_LON
FLOAT
Longitude of the granule where imaging began nearest the satellite. For an ascending satellite, it locates the lower left corner of a north-oriented image.
DOPPLER
FLOAT
The doppler centroid frequency - Useful for sar processing and interferometry. Related to the squint of the satellite.
FAR_START_LAT
FLOAT
Latitude of the granule where imaging began farthest from the satellite. For an ascending satellite, it locates the lower right corner of a north-oriented image.
NEAR_END_LON
FLOAT
Longitude of the granule where imaging ended nearest to the satellite. For an ascending satellite, it locates the upper left corner of a north-oriented image.
PROCESSING_TYPE_DISPLAY
STRING
Label that will be displayed in ASF's Vertex interface
POLARIZATION
STRING
Radar transmissions are polarized, with components normally termed vertical (V) and horizontal (H). Vertical means that the electric vector is in the plane of incidence; horizontal means the electric vector is perpendicular to the plane of incidence.
FAR_START_LON
FLOAT
Latitude of the granule where imaging began farthest from the satellite. For an ascending satellite, it locates the lower right corner of a north-oriented image.
THUMBNAIL_URL
STRING
URL that points to this granule's thumbnail image
ASF_PLATFORM
STRING
Internal ASF platform name
INSAR_STACK_ID
INT
An ASF-assigned unique number used internally to unifiy SAR images over the same location. Used for data that might be used for interferometry.
LOOK_DIRECTION
STRING
SAR imagery is taken with the sensor pointing either left or right of the satellite. Most data is right-looking. A small amount of Radarsat is left-looking.
PATH_NUMBER
INT
The path describes a path the satellite will follow over the earth similar to longitude; each path has an assigned number. Combined with a frame number is identifies a specific piece of ground.
NEAR_END_LAT
FLOAT
Latitude of the granule where imaging ended nearest to the satellite. For an ascending satellite, it locates the upper left corner of a north-oriented image.
FARADAY_ROTATION
STRING
An effect of the ionisphere that rotates polarizations from HH or VV or HV or VH. Significant for L or P band. Rotation over 5 degrees reduces usefulness for applications such as forest biomass. Effect is reduced at solar minimum.
FAR_END_LON
FLOAT
Longitude of the granule where imaging ended farthest from the satellite. For an ascending satellite, it locates the upper right corner of a north-oriented image.
BYTES
FLOAT
Product size in bytes.
CENTER_LAT
FLOAT
Latitude of the center of the scene or frame.
DEM_REGION
STRING
The DEM_REGION for this collection
https://vertex.daac.asf.alaska.edu/
Vertex, the ASF search and download interface
ASF00002
CARTESIAN
-180.0
90.0
180.0
-90.0
GEODETIC