Long name | KOMPSAT-2 Sensor Support |
Short name | KO2M / KO2P |
Key file name (use to open data set) | *.eph |
Supported file extension(s) | .eph, .hdf, .tif |
Sensor | Multispectral Camera (MSC) that produces both panchromatic (1m ground sample distance) and multispectral (4m ground sample distance) images with 10 bits per pixel quantization. |
Platform | KOMPSAT-2 (Korean Multipurpose Satellite) |
Data distributor | Distributed by SPOT Image (http://www.spot.com/html/SICORP/_401_402_1311_.php) and Korea Aerospace Industries (http://www.koreaaero.com/english/major/statellite.php) in Korea only. |
Sections | Data product name and version |
Name | Description |
---|---|
Processing Level 1R | Level 1R data that has been already radiometrically corrected, but not geometrically corrected. It is stored in TIFF format. |
Processing Level 1G | Image data that has been geometrically corrected using KOMPSAT-2 ancillary data and stored in GeoTIFF format. |
Processing Level 1R or Level 1G Fusion | The pansharpened image data using the panchromatic and multispectral bands of the MSC. |
File Format | Distribution | Contents |
---|---|---|
TIFF | CD/DVD | Level 1R |
GeoTIFF | CD/DVD | Level 1G |
Text | CD/DVD | Ancillary text, ephemeris data, and RPC data when the image data is in TIFF or GeoTIFF format. |
JPEG | CD/DVD | Browse and thumbnail images that are ignored by GDB. |
KOMPSAT-2 data products can have multiple sensor directories. These directories can contain TIFF or GeoTIFF files. Directories containing TIFF or GeoTIFF files include image files and associated image bands, a browse image file, a thumbnail image, ancillary text file(s), and ephemeris data file(s). Also included is a readme.txt file with information about all of the files in the data distribution.
File Name | File Type | Required | Contents | Details |
---|---|---|---|---|
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrPAxx_tt.tif | TIFF or GeoTIFF | Yes | PAN image | |
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrMXAxx_tt.tif | TIFF or GeoTIFF | Yes | MS image | |
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrPMSAxx_tt.tif | TIFF or GeoTIFF | Yes | Pansharpened image | |
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrPAxx_tt.txt | Text | Yes | Ancillary text files of PAN image | TIFF and GeoTIFF only |
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrMXAxx_tt.txt | Text | Yes | Ancillary text files of MS image | TIFF and GeoTIFF only |
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrPAxx_tt.eph | Text | Yes | Ephemeris data file of PAN | TIFF and GeoTIFF only |
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrMXAxx_tt.eph | Text | Yes | Ephemeris data file of MS | TIFF and GeoTIFF only |
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrTtt_br.jpg | JPEG | No | Browse | |
MSC_YYYYDDHhmmss_nnnn_PPPPrrrrTtt_tn.jpg | JPEG | No | Thumbnail |
MSC is the sensor code that GDB uses to identify the KOMPSAT product.
YYMMDDHhmmss is the scene center time expressed in UTC.
nnnnn is the orbit number.
PPPP is the path number.
rrrr is the first row number.
RRRR is the last row number.
T is P(Pan only) M(MS only) B(Pan+MS).
A is P(positive), N(negative) tilt angle.
xx is the tilting angle(first two digits).
tt is 1R or 1G.
P is P(Pan only).
MX is M(MS only)X(1,2,3,4).
PMS is Pansharpened.
Important notes to the user:
The GDB support of KOMPSAT-2 data products is “read-only”.
KOMPSAT-2 data sets can be distributed on CD or DVD. On disk, the data is organized in a special directory structure. GDB uses this directory structure and the file names to identify the data product type. Therefore, to preserve compatibility with GDB, the directory structure and file names must not be altered when the data is copied over to another location from the CD or DVD.
There are two ways to open a KOMPSAT-2 data set in a file selector:
If GDB is provided with the path and name of a TIFF or GeoTIFF file in the data set, it will not recognize the file as part of a KOMPSAT-2 data set and will, therefore, open the file as an independent TIFF or GeoTIFF file; all other files in the data distribution will be ignored.
Data product | Data returned | Details |
---|---|---|
MSC panchromatic image data | One raster channel |
This raster channel has 15000 pixels and 15000 lines. The ground sample distance of the image data is one meter. The returned channel description consists of the file base name and a description that is stored in the file. |
MSC multispectral image data | Four raster channels |
These raster channels each have 3750 pixels and 3750 lines. The rasters are spatially coincident and the ground sample distance of the image data is four meters. The channels contain images for green, blue, near-infrared, and red wavelength bands (called the MS1, MS2, MS3, and MS4 bands, respectively). The channel description that is returned for each channel has the same parts as the Panchromatic channel description. |
MSC pansharpened image data | Four raster channels |
These raster channels are generated by combining panchromatic and Multispectral data. The returned channel description consists of the file base name and a description that is stored in the tiff file. |
Geolocation data | One ground control point (GCP) segment |
This segment contains the georeference for the panchromatic multispectral image channel. This data is extracted directly from a TIFF or GeoTIFF data distribution file. |
Ephemeris data | One binary segment | GDB imports EPH data as a satellite position: EPH_PAD_RPY_DEG and EPH_SUN_ANGLE_DEG metadata.
GDB uses this metadata along with projection information to generate an orbit segment. |
RPC data | One binary segment | GDB imports a Rational Function model as a binary segment if the data product provides this information. |
General information and metadata | Text segment | The KOMPSAT-2 data product also includes a text file that contains general information. GDB imports this data as a text segment. |
Name | Description | Values |
---|---|---|
MD_PlatformName | Platform name | “KOMPSAT-2” |
MD_PlatformNumber | Platform number | “2” |
MD_ImageName | Full name of the type of the image | “Panchromatic” or “Multispectral” or "Pansharpened" |
MD_SourceID | Data file name | See Distribution Disk Files section |
MD_Acquisition_Date | Acquisition Date | YYMMDD |
MD_Acquisition_DateTime | Acquisition Date/Time | UTC Center Time, YYMMDDHhmmss |
OrbitNumber | Orbit number | 5-digit positive integer |
PathNumber | Path number | 4-digit positive integer |
RowNumber | Row number | 4-digit positive integer |
ImageCode | Short code for the sensing modality | “M” (for multispectral) or “P” (for panchromatic) and "PMS" (for pansharpened) |
MD_ProductType | Processing level | “L1R” or “L1G” |
Tilting | Tilting angle | “P” (for positive) or “N” (for negative) followed by a two-digit integer |
MD_SpatialResolution | Ground sample distance | 1m PAN or 4m MS |
MD_SpatialResolutionX | Ground sample distance in x direction | 1m PAN or 4m MS |
MD_SpatialResolutionY | Ground sample distance in y direction | 1m for PAN or PMS and 4m for MS |
MD_SensorModelName | Platform name and modality | “KOMPSAT-2_PAN” or “KOMPSAT-2_MULTI”
Pansharpened data does not have this metadata. |
MD_SensorCode | Code for the sensing modality | “PAN” or “MS”
Pansharpened data does not have this metadata. |
MD_IFOV | Instantaneous field of view | 1.459e-6 radian |
MD_RawCount | Number of lines in the image | 15000 for panchromatic and 3750 for multispectral |
MD_ColumnCount | Number of pixels in the image | 15000 for panchromatic and 3750 for multispectral |
MD_NumberofBands | Image Number of Bands | Number of bands in a data set |
MD_FormatName | Name of the file format | TIFF or GeoTIFF |
Returned metadata items that relate to EPH data:
Name | Description | Values |
---|---|---|
IMG_ACQISITION_START_TIME | yyyy mm dd hh mm ss.ssss | |
IMG_ACQISITION_END_TIME | yyyy mm dd hh mm ss.ssss | |
MD_SatPosition | Satellite Position | Time;X;Y;Z;X’;Y’;Z’...;all float value. The unit is expressed in meters and the coordinate frame in ECEF. |
EPH_PAD_RPY_DEG | Satellite Pad | X; Y; Z; float value, where the unit is expressed in degrees. |
EPH_SUN_ANGLE_DEG | Sun Angle | X; Y; Z; float value, where the unit is expressed in degrees. |
RPC_SCALE_LINE | RPC information | Integer, pixel |
RPC_SCALE_SAMPLE | RPC information | Integer, pixel |
RPC_SCALE_LAT_DEG | RPC information | float, degree |
RPC_SCALE_LONG_DEG | RPC information | float, degree |
RPC_SCALE_HEIGHT_METER | RPC information | float, meter |
RPC_OFFSET_LINE | RPC information | integer, pixel |
RPC_OFFSET_SAMPLE | RPC information | integer, pixel |
RPC_OFFSET_LAT_DEG | RPC information | float, degree |
RPC_OFFSET_LONG_DEG | RPC information | float, degree |
RPC_OFFSET_HEIGHT_METER | RPC information | float, meter |
RPC_COEF_NUME_LINE | RPC information | float |
RPC_COEF_DENO_LINE | RPC information | float |
RPC_COEF_NUME_SAMPLE | RPC information | float |
RPC_COEF_DENO_SAMPLE | RPC information | float |
AUX_SATELLITE_NAME | AUX information | string |
AUX_SATELLITE_SENSOR | AUX information | string |
AUX_TILT_ANGLE_ROLL_DEG | AUX information | float, degree |
AUX_TILT_ANGLE_PITCH_DEG | AUX information | float, degree |
AUX_BITS_PER_PIXEL | AUX information | integer |
AUX_SAMPLES_PER_LINE_MS | AUX information | integer, pixel |
AUX_LINES_PER_IMAGE_MS | AUX information | integer, pixel |
AUX_SCENE_CENTER_XY_PIXEL | AUX information | integer, pixel |
AUX_IMAGE_GSD_METER | AUX information | float, meter |
AUX_LINE_SCAN_TIME_USEC | AUX information | float |
MD_Azimuth_Angle | AUX information | float, degree |
MD_Incidence_Angle | AUX information | float, degree |
AUX_IMAGE_PAD_POD_FLAG | AUX information | Boolean |
MD_MapProjection | AUX information | String |
AUX_PROJECTOIN_PARAMETER | AUX information | String |
MD_EllipsoidName | AUX information | String |
AUX_RESAMPLING_NAME NONE | AUX information | String |
AUX_LOCATION_KGRS_KJ | AUX information | integer |
AUX_IMAGE_SHIFT_TO_ALONG | AUX information | integer |
AUX_IMAGE_ORBIT_NUMBER | AUX information | integer |
AUX_IMAGE_CENTER_LATLONG_DEG | AUX information | float, degree |
AUX_IMAGE_CENTER_ALTITUDE | AUX information | float |
AUX_IMAGE_TL_LATLONG_DEG | AUX information | float, degree |
AUX_IMAGE_TC_LATLONG_DEG | AUX information | float, degree |
AUX_IMAGE_TR_LATLONG_DEG | AUX information | float, degree |
AUX_IMAGE_BL_LATLONG_DEG | AUX information | float, degree |
AUX_IMAGE_BC_LATLONG_DEG | AUX information | float, degree |
AUX_IMAGE_BR_LATLONG_DEG | AUX information | float, degree |
AUX_STRIP_ACQ_DATE_UT | AUX information | long |
AUX_STRIP_ACQ_START_UT | AUX information | float |
AUX_STRIP_ACQ_CENTER_UT | AUX information | float |
AUX_STRIP_ACQ_END_UT | AUX information | float |
AUX_STRIP_ACQ_DURATION_SEC | AUX information | integer |
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