WODEN demonstrated via examples

Below are a number of example simulations with various settings. You can find and run these examples in the WODEN/examples directory. I’ll let you know how much storage you’ll need for each set of simulation and images (things can get large with radio data).

Two of the sky models are large (a total of about 100 MB), so instead of bundling them into the github, I’ve added links into the relevant instructions to download them.

Note

For all simulation times reported in the below, I used a single NVIDIA GeForce GTX 1080 Ti with 12 GB of RAM.

The examples are:

• Fornax A simulation
• MWA EoR1 simulation
• EDA2 Haslam Map simulation

Fornax A simulation - two examples that compare a point/Gaussian model to a shapelet model. This serves as a general introduction on how to simulate an MWA observation using a metafits file, with a few extra commands. It also serves as a comparison of running with woden_float and woden_double.

MWA EoR1 simulation - demonstrates using a larger (>300,000) source catalogue

EDA2 Haslam Map simulation - this demonstrates using WODEN without a metafits file, using a text file to describe the array layout, and using the EDA2 beam.

Warning

If you have a GPU with small amounts of RAM (say 2GB) some of these simulations won’t work to DOUBLE precision, you won’t have enough memory. You can add the --precision=float argument to switch to a lower memory requirement (for the loss of accuracy).