Orbit-segment Creator module

Description

The Orbit-segment Creator module generates satellite-orbit segments for multiple raster images.

Parameters

Name	Caption
Input Scenes	Input scenes folder
XSLT File	Input folder of reference images
Output Folder	Output folder
Overwrite Results	Overwrite existing results

Parameter descriptions

Input Scenes

The path and name of the folder containing RAW images and information from which to create orbit segments.

XSLT File

The path and name of the Extensible Stylesheet Language Transformations (XSLT) file that the Orbit-segment Creator module will use to convert the custom Extensible Markup Language (XML) file and generate the orbit segments. If no XSLT file is specified, the custom XML will be considered as meeting the requirements and be used as is.

Note: For more information about the supporting XML file, see Details.

Output Folder

The full path and name of the folder to which to write the PCIDSK (.pix) files with the computed orbit segments.

Overwrite Results

Select this check box to overwrite the existing output files, if any exist. If this check box is left clear, and an output file exists in the relevant folder, the status of the job displays a message informing you of the existence and name of the output file. The message is also written to the event log of the job.

Details

General job details

Preprocessing requirements

Before running this module, the following requirements must be met to ensure the job processes successfully and produces accurate results:

Input images must be in a GDB-supported format, such as a TIFF file (.tif)
Supporting XML file (the information needed to create the orbit segments) must exist in the same folder as the corresponding image

In addition to the preceding, image and support XML files must have the same naming convention, as shown in the example in Figure 1.

Figure 1. Sample folder structure and file-name convention

Sample folder structure and file-name convention

The following is an example of a typical support file and the metadata tags (or their equivalents) it contains.

Medadata tag	Description
LinkFile	Whether to create a link file (`Yes`/`No`)
InputImageRange	Range and azimuth spacing of the input image
SatelliteAltitude	Altitude above sea level
CenterLongitude	Longitude of the scene centre
CenterLatitude	Latitude of the scene centre
UpperLeftLongitude	Longitude of the upper-left corner
UpperLeftLatitude	Latitude of the upper-left corner
UpperRightLongitude	Longitude of the upper-right corner
UpperRightLatitude	Latitude of the upper-right corner
LowerRightLongitude	Longitude of the lower-right corner
LowerRightLatitude	Latitude of the lower-right corner
LowerLeftLongitude	Longitude of the lower-left corner
LowerLeftLatitude	Latitude of the lower-left corner
SatelliteSencorDescription	Satellite-sensor description
SceneDate	Date of the scene

The SatelliteAltitude tag is mandatory. If an input image is not georeferenced, the following tags are mandatory:

CenterLongitude	CentreLatitude
UpperLeftLongitude	UpperLeftLatitude
UpperRightLongitude	UpperRightLatitude
LowerRightLongitude	LowerRightLatitude
LowerLeftLongitude	LowerLeftLatitude

Module Details

The Orbit-segment Creator module generates an orbit segment for imagery of any satellite sensor to be used with Toutin's satellite model.

If the supporting XML file does not contain the metadata tags as cited in Preprocessing requirements, you must specify an XSLT file for the module to use to map and convert the information. For reference, two sample XSLT files, Orbit SegmentGF1Transform.xsl and OrbitSegmentHJTransform.xsl, are included in the etc folder of your CATALYST Enterprise installation.

Job results

On successful completion of processing, based on the metadata extracted from a custom XML file, the module writes an orbit segment to a new PCIDSK (.pix) file for each input scene.