Image files
- IMG1_0018.CR2: raw file [in ./CR2/ directory]
- IMG1_0018.info: basic info written during image acquisition. Contains weather data, mount pointing, etc... [in ./CR2info/ directory]
- IMG1_0018.imstat: image statistics. Created by skycam_mkimstat command. Image levels, etc... [in ./CR2info/ directory]
- IMG1_0018.astrom: astrometry and image distortion. Created by astromSolve command. See below for explanation [in ./CR2info/ directory]
Compiling a summary list of all images
The main data acquisition program can be used to compile a summary list of all images, which is very useful for quick data searches.
skycam mkimlist
This creates a text file imlist.txt with one line per image.
Bias
The bias for both cameras is 1024 ADU.
Flat Field
Identifying bad pixels
Astrometry
The astrometric solution for a file consists of position of central image pixel (RA, DEC), position angle, pixel scale, and distortion coefficients. A single command generates the astrometry file:
astromSolve 2011-02-26 IMG1_0018
This command reads the IMG1_0018.CR2 raw file and the IMG1_0018.info file (for rough estimate of pointint). The output is the IMG1_0018.astrom text file containing the astrometry and distortion parameters.