| | 1 | = Notes from Gene on test data distributed ~ Oct 2008 = |
| | 2 | |
| | 3 | Each directory contains the output data products from the 'chip' and |
| | 4 | 'camera' stage analysis of the IPP. A few notes on what is in this |
| | 5 | directory: |
| | 6 | |
| | 7 | The directory name: |
| | 8 | *o4732g0168o : this is the exposure name given at the telescope: (o - data taken by OTIS; 4732 - truncated MJD; g - data taken with GPC; 0168 - sequence number; o - OBJECT (not b / BIAS, d / DARK, f / FLAT, etc). |
| | 9 | *34857 : this is an IPP unique exposure ID |
| | 10 | |
| | 11 | Within the directory are files from the chip-level analysis with names |
| | 12 | starting with o4732g0168o.34857.ch.2676.XYij, where 'ch.2676' |
| | 13 | identifies the data with the chip analysis by the IPP unique |
| | 14 | chip-analysis ID (one per exposure) and XYij identifies the GPC1 ccd |
| | 15 | (i and j run from 0 to 7). |
| | 16 | |
| | 17 | Also within the directory are files from the camera-level analysis, |
| | 18 | with names starting with o4732g0168o.34857.cm.2174; as before, the cm |
| | 19 | denotes 'camera-level analysis', and the 2174 is the IPP unique camera |
| | 20 | analysis ID. |
| | 21 | |
| | 22 | For each chip, there are the following files: |
| | 23 | |
| | 24 | o4732g0168o.34857.ch.2676.XY74.b1.fits -- detrended FITS image binned 16x16 |
| | 25 | o4732g0168o.34857.ch.2676.XY74.b2.fits -- detrended FITS image binned 150x150 |
| | 26 | o4732g0168o.34857.ch.2676.XY74.ch.fits -- detrended FITS image |
| | 27 | o4732g0168o.34857.ch.2676.XY74.ch.mk.fits -- mask image |
| | 28 | o4732g0168o.34857.ch.2676.XY74.ch.wt.fits -- variance image (weight image) |
| | 29 | o4732g0168o.34857.ch.2676.XY74.cmf -- detected object table |
| | 30 | o4732g0168o.34857.ch.2676.XY74.log -- processing log |
| | 31 | o4732g0168o.34857.ch.2676.XY74.mdl.fits -- low-resolution background model |
| | 32 | o4732g0168o.34857.ch.2676.XY74.ppImage.mdc -- analysis configuration file |
| | 33 | o4732g0168o.34857.ch.2676.XY74.stats -- processing statistics |
| | 34 | o4732g0168o.34857.ch.2676.XY74.trace -- program trace messages |
| | 35 | |
| | 36 | * the images have had the mask applied and masked pixel values replaced from the background model (for cosmetic reasons only). |
| | 37 | * these detrend images have NOT been compressed, and are stored as 32bit floats, though for the survey data products, compression will be applied. |
| | 38 | * the weight and mask images are compressed using the method implemented by CFITSIO (version 3.09 and ds9 5.3 recommended) |
| | 39 | * the cmf file (detected objects) is not the final format; some modifications are being finalized. However, it is close to the final version. |
| | 40 | |
| | 41 | For the camera-level data products, the b1 and b2 fits images are |
| | 42 | assembled into a full mosaic and converted to jpegs. In this example, |
| | 43 | the images are rotated 180 from their intended orientation; chip XY00 |
| | 44 | is in the upper left corner. No astrometry calibration has been |
| | 45 | applied, and the standard output smf data product was skipped. |
