Up: [wiki:IPPatTheROE IPP at the ROE]

= IPP Filename Structure =

There are two parts to the filenames
 * Observation
 * Data reduction product
 * In the form ''Observation''.''DataReductionProduct''

== Observation ==

Consider: `o4997g0240o.77966`
 * `o` = OTIS (Observatory, Telescope, Instrument, and Software). Nothing else possible?
 * `4997` = Julian Date - 2,450,000
 * `g` = Gigapixel Camera.  Let's us know this is a PS1 observation. Though what will it be for PS4?
 * `0240` = Observation sequence number
 * `o` = '''o'''bject, '''b'''ais, '''d'''ark, '''f'''lat, etc.
 * `77966` = Exposure ID

== Data reduction product ==

Consider:
 * Either:
  * `o4997g0240o.77966.ch.41966.XY76.trace`
  * `o4997g0240o.77966.wrp.16984.skycell.1480.060.trace``
 * 'ch' = '''ch'''ip or '''wa'''rp''' or ...
  * If '''ch''' then it's a chip (i.e. detector coordinates)
   * `41966` = chip analysis. Not clear what this means.
   * `XY76` => chip in the GPC frame
    * i = 0 to 7, j = 0 to 7, with no 00, 07, 70, or 77)
   * `trace`
   * `psf`
   * `pplmerge.mdc`
   * `mdl`
   * `log`
   * `cmf`
   * `ch.wt`
   * `ch.mk`
   * `ch`
  * If '''wrp''' then it's a warm (i.e. mapped to sky coordinates)
   * `169841` = ?
   * `skycell` = invariant.  Just lets you know the next two numbers are skycell references
   * `1480` = Skycell 1480. Doesn't tell you much if you don't know the particular choice of skycell geometry. Just that it's the 1480th cell in the sky.
   * `060` = the 60th subcell in the skycell.
    * `trace`
    * `stats`
    * `pswarp.mdc`
    * `log`

== Skycells ==