KFPA Pipeline Development
Note that much of the content of this documentation is out of date. Please refer to the GBT Pipeline documentation instead!!!
This web page summarizes the KFPA pipeline history, outlines the current python pipeline code
and provides hints for developers wishing to update the pipeline. The major
software components are summarized: sdfits, gbtpipeline, idlToSdfits, AIPS, Obit/ParselTongue and
IDL code to extract parameters from image data cubes.
KFPA Pipeline History
The KFPA data reduction pipeline began as a set of IDL scripts run inside the GBTIDL
environment. These scripts were developed by Glen Langston and Katie Chynoweth for
GBT HI observations and then modified for higher frequency astro-chemistry applications.
When the KFPA project became an NRAO priority, Joe Masters and Bob Garwood took over
development and more fully integrated parts of the IDL code into the GBTIDL environment.
As the development progressed, it was determined that the calibration part of the
pipeline would be written in python. Joe Masters took the lead in this effort,
with Glen and Bob writing supporting documentation. Glen Langston created all of the
imaging procedures and Bob created support tools in GBTIDL for analysis of data input into
the pipeline. Glen made regular quality control checks of pipeline progress.
The python code is being developed using the
source control system. In the following
sections we give examples of how the
contributor may add to the gbtpipeline.
This section summarizes the major software components of the pipeline and their
The real-time gbt single dish fits filler (sdfits) reliably converts all
single dish spectra into a GBT single dish fits format file.
to describe the real-time filler and how it is
run. Also where to access the most real-time filler data and start up
gbtidl to examine it.
The gbtpipeline performs the calibration steps on the gbt spectra and
initiates automatically conversion of the calibrated spectra
to AIPS input format spectra and then initiates imaging of individual
Glen Langston wrote a program to convert calibrated GBT spectra, from
GBTIDL, into a format acceptable to AIPS. In addition to formatting
changes, idlToSdfits also performs a number of flagging and data
to expand this section
The imaging components of the pipeline are implemented using
AIPS. We summarize the most used AIPS tasks.
The parselTongue language provides a scripting interface to
AIPS functionality. The parselTongue python code is kept at the JIVE
web site: http://www.jive.nl/
Joe Masters included parselTongue in the gbtpipeline release. Glen Langston
created the imaging and analysis scripts for the pipeline.
A number of important tools, written for the GBTIDL environment are
critical for determination of proper KFPA (and other Receiver observations)
These procedures are summarized here.
and Glen Langston
These functions include
- and other procedures in /home/astro-util/gbtidl/contrib