RA - Create Ramp image

PURPOSE

Fits a least-squares plane to the picture, and subtracts the plane from the picture. A wedge-shaped overall density profile can thus be removed from the picture.

USAGE

.OPERATION: RA

.INPUT FILE: H_PIC001
[Enter the name of the file that needs to be corrected.]

.OUTPUT FILE: H_IMG043
[Output file name.]

NOTES

1. This operation should be used for pre-processing whenever the autocorrelation function has a "rooftop" appearance.

2. The result of the statistical F-test of the multiple correlation coefficient is calculated.

SUBROUTINES

RAMP_P, BETAI, BETACF, GAMMLN

CALLER

UTIL1