radioastronomy

I present here a UML™ Parsing Analysis of my old 1988 honours thesis An analysis of image formation by MOST (Molonglo Observatory Synthesis radioTelescope) into UML2 components, ports, and parts, using Composite Structure diagrams, to illustrate the basis of rotational aperture synthesis in the Molonglo Observatory Synthesis Telescope (MOST).

This work was performed in about 2005 using the MD10EAPbeta2 early release version of MagicDraw™ UML, which offered a degree (only)1 of UML2 Port and part Property support in Composite Structure diagrams.

The MOST radio-synthesis provides and excellent test case for UML2.0 tools, and despite limitations of the older version of MagicDraw UML that I used, these diagrams remain of value to those interested in modelling instruments in UML.

Note also that that this could now be much better modelled in Systems Modeling Language (SysML) !

The model is based on:

• Examination of my honours thesis from An analysis of image formation by MOST (Molonglo Observatory Synthesis radioTelescope), which also contains some figures of the MOST geometry, the skymap, and the
  fan-beam and synthesised beam.
• The classic description of the MOST synthesis by Mills:
  Mills, B., The molonglo observatory synthesis telescope, Proc.ASA, 4, 156-159, 1981
• The classic description of rotational aperture synthesis by Perley:
  Perley, R., Pencil beam formation by fan-beam rotation in radio astronomy, Astron.J., 84, Sep 1979
• Discussions with Dave Crawford, including this paper:
  Crawford, D., The ideal molonglo observatory telescope, April 1988, Dept. of Astrophysics, Univ. of Sydney.
• Explanations by Michael Large, Lawrence Cram, Tony Turtle, and Bruce McAdam
• A little guesswork, interpolation, and some memory wracking.

1. . a. b.

Some key diagrams about the Molonglo Observatory Synthesis radioTelescope (MOST) extracted from Dr Darren Kelly's honours thesis from 1988, An analysis of image formation by MOST (Molonglo Observatory Synthesis radioTelescope) , completed at the Department of Astrophysics, School of Physics, University of Sydney. These diagrams should help readers understand the MOST synthesis model and the notatation used elsewhere for this MOST zone.