Changes between Initial Version and Version 1 of md06.refstack.y

Timestamp:

Mar 22, 2011, 3:38:05 PM (15 years ago)

Author:

bills

Comment:

--

md06.refstack.y

@@ +1 @@
+
+== Example building a reference stack ==
+
+As of 2011-03-22 we do not have a reference stack for MD06 in y band. We were waiting until we build MD06.V2 stacks for all filters but now we've decided to build a "V0" stack just for y.
+
+Since the IPP always cleans up data as we go along we will need to reprocess the exposures. We want to select those with
+the best image quality while making sure that we have a deep enough stack. After several iterations doing this manually Bill built a tool called refstacktool. It is misnamed since it doesn't make the stack, it selects exposures for them.
+
+It lots of options. Luckily it has pod documentation: See perldoc ipp/tools/refstacktool in your local source tree.
+Basically there are two sets of options "selection options" and "run options".
+Let's see what we've got for MD06 y filter using the default options.
+
+{{{
+perl ipp/tools/refstacktool --field MD06 --filter y
+Found 98 exposures for MD06 y.
+Range of fhwm_major: 3.28499 - 4.17658
+}}}
+
+That's a pretty good set of inputs even with the default options. What if we cut down to fwhm <= 4 pixels (~1 arc second)?
+
+
+{{{(ippc18:~) bills% perl ipp/tools/refstacktool --field MD06 --filter y --fwhm_max 4
+Found 87 exposures for MD06 y.
+Range of fhwm_major: 3.28499 - 3.99525
+}}}
+
+We only use 9. Lets go with that. 
+
+We've got the parameters to select our input images, now let's set up our "run options". We need to select a label. The default will be MD06.refstack.20110322. That's fine. Next we need to select a tess_id. Since we want to use the "V0" tess_id "MD06" we will need to set this explicitly. I think that's all we need. Let's do a trial run
+
+
+{{{
+ perl ipp/tools/refstacktool --field MD06 --filter y --fwhm_max 4 --tess_id MD06 --pretend --verbose
+lots of output like the following omitted
+
+chiptool -dbname gpc1 -definebyquery -set_label MD06.refstack.20110323 -set_workdir neb://@HOST@.0/gpc1/MD06.refstack.20110323 -set_dist_group MD06 -set_tess_id MD06 -set_end_stage warp -pretend -simple -exp_id 174036
+174036 o5344g0130o GPC1 PS1 2010-05-28T08:18:05.000000 o5344g0130o.174036 OBJECT CHIP neb://@HOST@.0/gpc1/20100528 full    reg y.00000 MD06_y_N5344_MD06_dither_1 MD  1.224000 3.228834 0.822521 240.000000 0.000745 8702.118164 74.691444 915.238647 54.750154 -34.775806 -84.713303 53.752789 0.000000 1000.000000 0.026800 -18.999800 -73.997101 471.622986 -506.848999 -1044.849976 74.055397 204.945007 6.600000 28.000000 3.900000 166.000000 8.550000 8.200000 6.550000 5.550000 7.300000 6.100000 302469.000000 nan nan nan nan nan MD06_dither_1 92.733803 -38.059399 93.250504 32.030800 0.514249 ipp015 0 2010-05-27T22:26:13.000000 0}}
+
+This shows the chiptool commands and the outputs. We do get 87 exposures and the definebyquery command 
+
+
+
+