Displacement Decomposition from Asc and Desc geometries

Purpose

Displacement Decomposition tool calculates the vertical and east-west components of the displacement, when both ascending and descending displacements are available over the same area of interest.

Technical Note

This tool exploits two displacement measurements obtained from two different acquisition geometry (Ascending and Descending) to retrieve the displacement components along the plane East West and vertical. The component in the North South direction is not derived yet. The tool can deal with geocoded average velocity (in raster format) and geocoded displacement time series (in raster format). In case of time series, the resulting decomposed components series will cover the common time span between the ingested ascending and descending series, without any bias (starts from 0).

Each displacement measure is fully described by the magnitude and the angles (azimuth and inclination) of the satellite Line Of Sight.

Input Files

Input Ascending

File name of the ascending velocity (_vel) or file name of the ascending time-series of displacements (_meta). This file is mandatory.

ALOS Ascending

File name of the ascending Azimuth Line Of Sight image (_ALOS). This file is mandatory.

ILOS Ascending

File name of the ascending Incidence Line of Sight image (_ILOS). This file is mandatory.

Input Descending

File name of the descending displacement (_disp) or file name of the descending time-series of displacements (_meta). This file is mandatory.

ALOS Descending

File name of the descending Azimuth Line Of Sight image (_ALOS). This file is mandatory.

ILOS Descending

File name of the descending Incidence Line of Sight image (_ILOS). This file is mandatory.

Output Files

Output Root Name

Name of the output root. This file is mandatory.

_horizontal

Velocity component along the East-West direction (if velocities are used as input). Displacement convention: East direction is characterized by positive values; West direction is characterized by negative values.

_vertical

Velocity component along the vertical direction (if velocities are used as input). Displacement convention: subsidence is characterized by negative values; uplift is characterized by positive values.

_horizontal.meta

Time series of displacements component along the East-West direction (if time-series are used as input).

_vertical.meta

Time series of displacements component along the vertical direction (if time-series are used as input).

Details specific to the Units of Measure and Nomenclature of the output products can be found in the Data Format section.

General Functions

Exec

The processing step is executed.

Store Batch

The processing step is stored in the batch list. The Batch Browser button allows to load the batch processing list.

The window will be closed.

Help

Specific help document section.

Specific Function(s)

None.

References

Fialko Y., Simons M., 2001. The complete (3-D) surface displacement in the epicentral area of the 1999 Mw 7.1 Hector Mine earthquake, California, from space geodetic observations. Geophysical Research Letters, vol. 28, no 16, pp 3063-3066.