simms

simms simulates radio-interferometer observations end to end: telsim builds a Measurement Set (MS) from a telescope layout, and skysim predicts model visibilities from a sky model (ASCII catalogue, FITS image, or WSClean component list) into it. A standalone primary-beam tool exposes the beam operations on their own.

$ simms telsim --telescope kat-7 --startfreq 900MHz --dfreq 1MHz --nchan 64 obs.ms
$ simms skysim --ascii-sky skymodel.txt --column DATA obs.ms

Getting started

• Installation
  • Requirements
  • From PyPI
  • From GitHub
  • For development
• Quickstart
  • 1. Create an MS
  • 2. Write a sky model
  • 3. Predict visibilities
  • Chain both steps
  • Where to next

Concepts

• telsim – building a Measurement Set
  • Required inputs
  • Usage
  • Where to next
• skysim – predicting visibilities
  • Basic usage
  • ASCII sky model schema
  • FITS sky models
  • Adding or subtracting an existing column
  • Thermal noise
  • Chunking large MSs
  • Where to next
• Schemas
  • simms sky model schema
  • PyBDSF sky model schema mapper (Gaussian source list; Gaul)
• Measurement Set conventions
  • Telescope metadata has a single source of truth
  • Pointing centre vs. phase centre
  • Spectral frame must be set
  • STRING columns

Using simms

• Command-line interface
  • simms

Reference

• API reference
  • telsim
  • skysim
  • Primary beams

Project

• Contributing
  • Contributing to simms

Indices

• Index

• Module Index

• Search Page