Differences between revisions 13 and 18 (spanning 5 versions)

PROCESS_FITS

Category B

Version 3.0.1

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

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.(JRW edit: Do you mean 16-bit image?) 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

process_fits can be run in two modes

Single file - just give the FITS filename at the prompt
Batch mode
- If the file newpic.txt exists, then process_fits will search through ../OSIRIS_REX/NEW_IMAGES to find the image and process. NEW_IMAGES is configured as YYYY/DOY/<source images>

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)

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- * 16 image(s) are stored to [[IMAGEFILES]] directory.  Stretched from 0 to 65536
+ * 16 image(s) are stored to [[IMAGEFILES]] directory.(JRW edit: Do you mean 16-bit image?)  Stretched from 0 to 65536
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-= 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.
+= 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.
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+process_fits can be run in two modes

 * Single file - just give the FITS filename at the prompt
 * Batch mode
  * If the file [[newpic.txt]] exists, then process_fits will search through ../OSIRIS_REX/NEW_IMAGES to find the image and process.  [[NEW_IMAGES]] is configured as YYYY/DOY/<source images>
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