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Re: Frame to frame differences
Rob and all,
I plotted the data below. The V data is consistently less than the I
data. This is strange since both telescopes are on the same drive. I just
plotted the last column which I believe to be E-W axis. The results look
pretty trend less to me, though there is the possibility that the drive
rate is trailing off near the end of the V data. This is the kind of
effect I expect, the rate changes at the limit. But this is too little
data to draw much of a conclusion, I think.
In any case, V and I data should have the same mean rate. They do not.
Tom Droege
At 06:25 PM 10/16/01 -0600, you wrote:
>Ok,
>
>Here's some data. Note that this is produced from an un-qualified pipeline,
>but at least the results look reasonable :-) This data was gathered by
>using Michael's match program (linear match), a Perl script, and the output
>from one stage of my pipeline. The first number is the rotation between the
>frames listed (atan c/b) converted to degrees. The second is the X offset
>(a), and the third is the Y offset (d). There are some frames missing as I
>didn't get good catalog matches from them. If I re-run the pipeline using
>raw images (vs dark/flat corrected images), I will get more catalog matched
>images, but I think this provides some reasonable data (doesn't it?).
>
>I'd be happy to run again on raw images if anyone would like. Or do some
>graphing with the data. Gotta run right now though.
>
>Matching hira2157630.fits to hira2157632.fits: Bad match
>Matching hira2157632.fits to hira2157634.fits: 0.0025 -6.03 0.30
>Matching hira2157638.fits to hira2157639.fits: 0.0029 -5.85 0.33
>Matching hira2157639.fits to hira2157641.fits: Bad match
>Matching hira2157641.fits to hira2157643.fits: Bad match
>Matching hira2157646.fits to hira2157648.fits: Bad match
>Matching hira2157652.fits to hira2157653.fits: Bad match
>Matching hira2157653.fits to hira2157655.fits: Bad match
>Matching hira2157655.fits to hira2157657.fits: 0.0041 -5.62 0.40
>Matching hira2157657.fits to hira2157659.fits: 0.0037 -5.48 0.48
>Matching hira2157659.fits to hira2157661.fits: 0.0040 -5.72 0.44
>Matching hira2157661.fits to hira2157662.fits: 0.0042 -5.60 0.37
>Matching hira2157666.fits to hira2157668.fits: 0.0055 -5.54 0.30
>Matching hira2157668.fits to hira2157669.fits: 0.0059 -5.49 0.39
>Matching hira2157669.fits to hira2157671.fits: 0.0050 -5.42 0.41
>Matching hira2157684.fits to hira2157685.fits: 0.0076 -5.29 0.21
>
>Matching hvra2157623.fits to hvra2157625.fits: Bad match
>Matching hvra2157625.fits to hvra2157627.fits: 0.0016 -5.92 0.15
>Matching hvra2157627.fits to hvra2157629.fits: 0.0027 -6.00 0.18
>Matching hvra2157629.fits to hvra2157630.fits: Bad match
>Matching hvra2157630.fits to hvra2157632.fits: 0.0026 -5.87 0.19
>Matching hvra2157632.fits to hvra2157634.fits: 0.0028 -5.91 0.11
>Matching hvra2157638.fits to hvra2157639.fits: 0.0032 -5.81 0.09
>Matching hvra2157639.fits to hvra2157641.fits: 0.0039 -5.83 0.15
>Matching hvra2157641.fits to hvra2157643.fits: Bad match
>Matching hvra2157643.fits to hvra2157645.fits: Bad match
>Matching hvra2157645.fits to hvra2157646.fits: Bad match
>Matching hvra2157646.fits to hvra2157648.fits: 0.0040 -5.80 0.20
>Matching hvra2157652.fits to hvra2157653.fits: 0.0047 -5.75 0.26
>Matching hvra2157653.fits to hvra2157655.fits: 0.0051 -5.65 0.18
>Matching hvra2157655.fits to hvra2157657.fits: 0.0056 -5.69 0.12
>Matching hvra2157657.fits to hvra2157659.fits: 0.0054 -5.63 0.30
>Matching hvra2157659.fits to hvra2157661.fits: 0.0053 -5.63 0.13
>Matching hvra2157661.fits to hvra2157662.fits: 0.0058 -5.58 0.17
>Matching hvra2157666.fits to hvra2157668.fits: Bad match
>Matching hvra2157668.fits to hvra2157669.fits: 0.0063 -5.45 0.15
>Matching hvra2157669.fits to hvra2157671.fits: 0.0063 -5.42 0.33
>Matching hvra2157671.fits to hvra2157673.fits: 0.0057 -5.41 0.08
>Matching hvra2157673.fits to hvra2157675.fits: 0.0073 -5.38 0.13
>Matching hvra2157675.fits to hvra2157677.fits: 0.0061 -5.38 0.15
>Matching hvra2157680.fits to hvra2157682.fits: 0.0064 -5.25 0.16
>Matching hvra2157682.fits to hvra2157684.fits: Bad match
>Matching hvra2157684.fits to hvra2157685.fits: 0.0072 -5.27 0.10
>Matching hvra2157685.fits to hvra2157687.fits: Bad match
>Matching hvra2157687.fits to hvra2157689.fits: 0.0079 -5.25 0.21
>Matching hvra2157689.fits to hvra2157691.fits: 0.0075 -5.18 0.01
>Matching hvra2157694.fits to hvra2157696.fits: 0.0077 -5.07 -0.05
>
>
>
>Robert Creager
>Senior Software Engineer
>Client Server Library
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