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         title="Permalink to Making maps faster">Making maps faster</a></h2>
 
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    <abbr class="published" title="2011-02-07T04:39:00-07:00">
      2011/02/07
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      By <a class="url fn" href="https://keflavich.github.io/blog/author/adam-adamgginsburggmailcom.html">Adam (adam.g.ginsburg@gmail.com)</a>
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    <p>The fundamental problem at this point is making the pipeline run faster.
At current speeds, with undownsampled data, it may take ~days to process
a single map. Ideas for faster processing:</p>
<ol class="arabic simple">
<li>Find out how long it takes to converge to 1%, 5%.... If it only
requires 10 iterations, that's a factor of 2 savings over current
strategies.</li>
<li>Use downsampled data of some sort if possible. Does DS2 match DS1?
How do we measure it? Flux-flux comparison and PSF point-source size
measurements are the most important. Need to automate PSF
comparison....</li>
<li>Can we use median-combined individual images as a 0th order model? I
bet the answer is 'yes' and will probably increase the speed of
convergence by a large amount. Tests to run? This is probably needed
if we are to split up the 'super-fields' into smaller sub-fields,
otherwise overlapping data will be used less effectively.</li>
<li>Find some way to keep bgps.raw, bgps.ra, bgps.dec, and other items
that are only used once on the HD during the iterative process. Is
there any way to separate out data in a struct in this manner?</li>
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