ALOS PRISM

Long name	Advanced Land Observing Satellite (ALOS) Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM)
Short name	ALPR
Key file name (use to open data set)	VOL-ALPSM*
Supported file extensions	.led, .sup, .trl, .img

Sensor	Optical
Platform	ALOS
Data distributor	Earth Observation Research Center
Sections	Data product name and description Distribution disk files Returned data Returned file-level metadata Returned channel-level metadata References

Data product	Description	Version
Level 1A	This is PRISM raw data extracted from the Level 0 data, expanded and generated lines. Ancillary information, such as radiometric information, is required for the processing, superior to the Level 1B is added. (Nadir mode, foward, backward view) (Nadir 70km observation mode) Georeference Image file is created per CCD unit. For 35km x 35km 4 CCD units. For 70km x 35km 6 CCD units.	1
Level 1B1	This is the data that performed radiometric absolute calibration coefficient. Ancillary information such as radiometric superior to the Level 1B2 is added. (Nadir mode, forward, backward view) (Nadir 70km observation mode) Georeference Image file is created per CCD unit. For 35km x 35km 4 CCD units. For 70km x 35km 6 CCD units.	1
Level 1B2 -1B2R 35kmx35km -1B2R 70kmx35km -1B2G Variable size	This is the data that performed geometric correction to Level 1B1 data. The following correction options are available. -1B2R Nadir normal mode forward, backward view Georeference data -1B2R Nadir observation mode Georeference data -1B2G Nadir normal mode forward, backward view Nadir 70 km Observation mode Geocoded data The image size will be variable and double at the maximum. There is only one image file in total, since each CCD was combined to make one scene.	1

File name	File type	Required	Contents	Details
VOL*	CEOS	Yes	Volume descriptor	Volume file
IMG*	CEOS	Yes	Image data	Image file
LED*	CEOS	Yes	Scene header Map protection Radiometric collection Platform position data	Leader file
TRL*	CEOS	Yes	Histogram data	Trailer file
SUP*	CEOS	No	Precession orbit data Conventional orbit data	Supplemental file
RPC*	Text	No	Rational functions	N/A

Data product	Data returned	Details
Panchromatic image (single band)	One channel for panchromatic data (PAN). Resolution: 2.5 meters	GDB retrieve one image band form one image file for panchromatic data.
Panchromatic image (assembled by CCD bands)	Geometric uncorrected image of PRISM image file is created per CCD unit. Resolution: 2.5 meters	GDB retrieve six or eight image bands and assembled them to one PAN channel.
Rational Functions Model Data	One binary segment for Rational Functions Model Data information.	GDB generate a binary segment for Rational Functions Data.
Orbit data	One orbit segment for orbit data.	GDB generate a orbit segment for orbit Data.

Name	Description	Value
Acquisition_DateTime	Acquisition date and time of the image	YYYY-MM-DDTHH:MM:SS.XXXXXXZ
AcrossTrackAngle	Across-track angle	Real
AngleofSolarElevation	Angle of solar elevation	Real
ColumnCount	Number of columns in the image	Integer
FormatName	Product data format	String
NominalLocation_Latitude	Latitude of nominal location	Real
NominalLocation_Longitude	Longitude of nominal location	Real
NumberOfBands	Number of bands in the image	Integer
OrbitInclination	Inclination of orbit	Real
OrbitPeriod	Period of orbit	Real
PlatformName	Name of platform	String
ProductType	Type of product data	String
RowCount	Number of rows in the image	Integer
SensorCode	Code of the sensor that acquired the data	String
SensorModelName	Model name of the sensor that acquired the data	String
SensorType	Type of sensor	Optical
SolarAzimuth	Solar azimuth	String
SourceID	Unique ID of the image source	String
MD_SpatialResolutionX	Horizontal spatial resolution of the image	Real
MD_SpatialResolutionY	Vertical spatial resolution of the image	Real

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