Cartosat-1

Long name	Cartosat-1
Short name	CART
Key file name (use to open data set)	BAND_MET.TXT
Supported file extension(s)	.txt and .tif

Sensor	Two panchromatic cameras providing stereoscopic images at 0.5-0.85 microns; (1) Camera fore with a tilt of +26 degrees, and (2) camera aft with a tilt of -5 degrees
Platform	Cartosat-1
Data distributor	National Remote Sensing Agency (NRSA) for national and neighboring countries. Antrix Corporation for international users.
Sections	Data product name and version Distribution disk files Naming convention Returned data Returned metadata References

Processing level	Description	Version
Standard product 4 - OrthoKit	Radiometric corrections along with rational polynomial coefficients (RPCs)	1
Standard product 5 - Ortho Product	Terrain-corrected products using TCPs and digital elevation model (DEM) from SST software	1
Standard product 6 - Area of Interest (AOI) Products	Standard products - (georeferenced) Covering any user-desired polygonal area, multi-scene, multi-volume products, masking the areas outside user AOI with packaging logically	1

File name	File format	Required?	Contents	Details
*.tif	GeoTIFF	Yes	Image data	N/A
*_MET.txt	Text	Yes	Image metadata	N/A
*_RPC.txt	Text	Yes	Image rational functional model for object to image space coordinates	N/A

The following naming convention is used for identification of Cartosat-1 standard product files.

Image (.tif)

<BAND>

Metadata (.txt)

<BAND>_MET.txt

RPC (.txt)

<BAND>_RPC.txt

The following table describes the file-name attributes.

Substring code	Description	Allowed values
<BAND>	The band applied, fore or aft	N/A

File-naming convention source: Cartosat-1 Data User’s Handbook

Data product	Data returned	Details
Image	One raster channel	GDB retrieves the single band from file in the Orthokit level product
RPC file	Rational Polynomial Coefficients (RPC) segment	The OrthoKit level product is delivered with an associated RPC model. The RPC values can be used for advanced image processing. GDB retrieves this information as an RPC segment for each band.
Ephemeris data	Orbit information in binary segment	The GDB returns ephemeris data as an orbit segment. This segment includes information about the satellite position, satellite altitude, IFOV, projection, sensor, orbit, and more.

Name	Description	Values
Acquisition_Datetime	Date and the time of image acquisition	String
AcrossTrackAngle	Angle across the track	Float
AngleOfSolarElevation	Angle of solar elevation	Float
IncidenceAngle	Angle of incidence	Float
LookDirection	Direction of the sensor, forward (PAN_FORE) or backward (PAN_ALT)	String
NominalLocation_Latitude	Nominal center latitude	Float
NominalLocation_Longitude	Nominal center longitude	Float
PlatformName	Name of the platform	String
SatelliteAltitude	Orbital altitude of the satellite	Float
SatelliteAzimuth	Orbital azimuth of the satellite	Float
SolarAzimuth	Azimuth of the sun	Float

National Remote Sensing Agency (2006). Cartosat-1 Data User’s Handbook, Hyderabad, India