This page contains hints and tips specific to processing SCUBA-2 data with ORAC-DR and PICARD.
ORAC-DR
Running the science pipeline at JAC/JCMT
At the JCMT, define ORAC_DATA_OUT to point to where you want the processed data to end up:
% setenv ORAC_DATA_OUT `pwd`
(Not necessary at JAC, but it doesn't affect things if you set it.)Initialize the pipeline for the date you wish to process:
% oracdr_scuba2_XXX -honour YYYYMMDD
where XXX is the wavelength (450 or 850).
Determine the observation numbers you wish to process with, e.g., scuba2_index
Run the pipeline:
% oracdr -loop flag -list obs1,obs2,obs3
where obs1 is the number of the first observation to process etc. (Contiguous ranges may be specified using a semicolon: 3:6 means observations 3 to 6 inclusive. This will run the pipeline using the default recipe or the one given in the FITS header (specified at the time the MSB was created).
The pipeline will open a window for writing messages detailing the processing, and will display reduced maps with Gaia. The message window can be omitted by running the pipeline with -log sf, which will write messages to the terminal screen instead.
You may specify an alternative recipe as the last argument on the command line. Choices are limited at this time but new recipes will be added as suitable config files are created (for general observing and for each survey). A suitable alternative for processing blank fields (or fields with faint point sources) is REDUCE_SCAN_FAINT_POINT_SOURCES. However, you may wish to process pointing observations of calibrators using a different recipe (for example, to apply to same processing to source and calibrator). SASSy data should be processed with the REDUCE_SASSY recipe.
You may give the pipeline an alternative makemap configuration file. Create a text file (say, params.txt) and put the following:
[RECIPE_NAME] MAKEMAP_CONFIG = my_config_file.lis
where RECIPE_NAME is the name of the recipe that will be used by the pipeline. The default is REDUCE_SCAN. Add -recpars params.txt to the command line to make use of the new config file (which must exist in the pipeline output directory).
The output files will end in _reduced.sdf. The map for an individual observation begins sYYYYMMDD; the coadd for a single source starts with gsYYYYMMDD.
Pipeline warnings and error messages
These two pages list common warnings and error messages, primarily to assist with interpreting the output from the live pipelines (QL and SUMMIT) running at the telescope. However, they are, for the most part, equally applicable to running the science pipeline offline.
PICARD
PICARD recipes (including many for SCUBA-2) are documented on the PICARD web page. That page also includes a list of helpful hints and tips and solutions to a few common problems. Issues specific to SCUBA-2 will be listed here.
- Note that PICARD can not deal with both wavelengths in a single recipe run - the data given must all have the same wavelength.