PROCESS_FITS

Description

This program

• reads a FITS image file
• extracts relevant information from the header

• adds a record to the make_sumfiles.in file

• adds a raw 16- bit unsigned integer image to the IMAGEFILES directory

OREx Naming convention

Level 0

The data stored in each image file contained in the IMAGEFILES directory is a scaled unsigned integer (as 14 bits folded into 16 bits), with the exclusion of values less than 0. Acceptable values are from 0 to 16,383.

Level 1

If the source is a real (or 32-bit float) value process_fits takes the original images' data float and calculates the maximum value. Then it scales the data to spread from 0 to 65536 to maximize the accuracy of the stored data.

ECR Changes from 3.0A2

• Support OREx level 0 images
  • Trim the second channel from the image to make it 1024x1024
  • Remove dark/bias -- This comes from the shielded overscan region
  • Correct the flat field
  • Desmear the image

Required Files

• FITS image file - You provide the name as part of the standard input.

• DATA/DN2TEMP.TXT

• DATA/FLATFILES.TXT

Outputs

• a row for the image is appended to make_sumfiles.in

• 16 image(s) are stored to IMAGEFILES directory. Stretched from 0 to 65536

= WARNING ==

• The program display will put the 0,0 position of the image in the top left, but OREx wants 0,0 to be in the bottom left.

Using process_fits

Here is a sample of the standard input:

 Input filename
2019-01-20T22-47-05.541_PCAM_L0b_V004.fits
 OKAY
2019 JAN 20 22:47:05.050
EXPOSURE(ms) =    100.000
 MSB SIGNED
      0.00      0.00      0.00      0.00      0.00
   5.0000000000000000     
P601296494J3

process_fits-3.0A2

(Compiled by KD)

CategoryPrograms