NRAO Home  >  Green Bank  |  Wiki Topic:    GB > Software > DishReleaseNotes_4_7

Changes | Index | Contents | Search | Statistics | Go

AIPS++/DISH Release Notes

Released on Wednesday, November 17, 2004 with M&Cv4.7

• Major Changes and Additions
  • AIPS++ Library Reorganization
• New Features & Changes
  • d.SRcal has a new argument
  • Introduction of d.msbase for managing baselines in a calibrated MS
  • Ka receiver table extensions ignored

Major Changes and Additions

AIPS++ Library Reorganization

This is the first stable after the aips++ library re-organization. No functional difference should be noted from the users perspective.

New Features & Changes

Two changes in dish's glish code to support Robin Herrnstein were made when she was in CV doing data reduction. These are both likely to be of interest to users:

d.SRcal has a new argument

d.SRcal now has an "nif" argument so you can specify which IF # you'd like to apply the "off" spectra to. Previously, if you gave it an SDRecord as the "off" spectra, it would apply that to all IFs, which is likely not appropriate in the multi-IF case.

Introduction of d.msbase for managing baselines in a calibrated MS

d.msbase is new. This allows you to fit and remove a baseline from a calibrated MeasurementSet?. Previously, the only way you could do that and keep the result in the MS was by specifying it at the time of calibration. This allows you to separate out the baseline fitting and removal from the calibration step. There is one caveat: the results over-write the previously calibrated data and so if you need to start over, you have to go back and re-do the calibration step. Its probably a good idea to play around with some sample spectra from the MS within dish before doing an msbase on the entire MS. The syntax is:

d.msbase(scan, range=F, order=1, nif=-1)

scan is the scan (or vector of scans) to select, range is the channels to use in the fit (same syntax as that argument in d.calib, defaults to entire range), order is the order of the polynomial to fit (defaults to 1), and nif is the IF# to select (defaults to all IFs.)

Ka receiver table extensions ignored

All Ka receiver table extensions (i.e. anything that isn't named "RX_CAL_INFO") are ignored.