SIGCLIP - Clip a dataset at n-sigma

Description:

This program uses KAPPA stats to calculate mean and standard deviation of an NDF. It then uses KAPPA thresh to set the values at $\pm$n-sigma to BAD. The clipped data are written to NDF_clip.sdf.

Usage:

sigclip NDF SIGMA

Parameters:

NDF (Given)

The required dataset

SIGMA = REAL (Given)

The clipping level

Examples:

sigclip test 3.0

Clips test.sdf at $\pm$3.0 sigma and writes the data to test_clip.sdf.

Notes:

The $KAPPA_DIR environment variable must point to the location of the KAPPA binaries (this is usually done during a Starlink login).

Related Applications

SURF: scucat, scuphot;
KAPPA: stats, thresh

Implementation Status:

• The program must have two arguments. Parameters are not requested if an argument is omitted from the command line.