SATMODEL

Description

SATMODEL computes the math model of one or more satellite images using Toutin's model and stores the result in a segment in the image file.

Parameters

Name	Type	Length	Value range
Input: Input image layers *	Raster port	1 - 192
InputGCP: Input GCP segment	GCP port	0 - 1
InputORB: Input orbit segment	ORB port	0 - 1
OutputMM: Math model segment or layer	Raster port	0 - 1
Output Projection	String	0 - 1	PIXEL, UTM, LONG/LAT, and others
Report	String	0 - 192	See parameter description

* Required parameter

Parameter descriptions

Input: Input image layers

Specifies the input raw satellite image layers to be processed.

InputGCP: Input GCP segment

Specifies the ground control point (GCP) segment or layer in the input raw image to use to compute the model.

InputORB: Input orbit segment

Specifies the orbit segment or layer in the input image to use to compute the model.

OutputMM: Math model segment or layer

Specifies the math model segment or layer to store the model.

Output Projection

Specifies the projection string for the output model.

The standard definitions are as follows:

• PIXEL: pixel and line
• UTM: Universal Transverse Mercator
• SPCS: State Plane Coordinate System
• LONG/LAT: longitude and latitude
• METER: image along-row and along-column meters
• FOOT: image along-row and along-column feet

For a complete list of supported projections and Earth models, see Understanding map projections. The format of the map units string is described in Output units.

If this parameter is not specified, the map units of the specified GCP segment are used. If no GCP segment is specified, the UTM unit stored in the orbit segment is used.

Report

Specifies where to direct the generated report.

Available options are:

• LOG: generates a report on the terminal (default)
• <modulename.RPT>: appends a report to the module's RPT file
• DISK: generates a report on file "IMPRPT.LST"

Details

SATMODEL computes the math model of one or more satellite images using Toutin's model. This includes bundle adjustment of multiple scenes, using ground control points (GCPs) or tie points, or both.

The output is a refined math model for each image, saved either to a math model segment in the image file or to the OrthoEngine project file, depending on the input.

If the DBGC (InputGCP) parameter is not specified, SATMODEL uses the four corner points and scene center point stored in the ORBIT (InputORB) segment as GCPs; however, these points are not available for every format.

If DBGC (InputGCP) is not specified and these points are not available, SATMODEL exits with an error. The corners points are only an estimate and are not accurate. Use them only when accurate GCPs cannot be obtained.