SKA1-low v5 analysis scripts

This repo contains a set of scripts and results from a brief study looking in the SKA1-low v5 configuration. We attempt this by comparing the reference v5 configuration to a set of proposed alternatives.

Results sub-folder

Folder containing some selected outputs, from the study including telescope configuration files in iantconfig format. See the README.md file in the results folder for further details.

Scripts sub-folder

Folder containing various python scripts and modules used in the analysis. See the README.md file in the scripts folder for further details.

Alternative telescope models considered

(This should be considered an initial set which we intend to iterate upon)

1. model01_r<N>: Unwraps (replaces) spiral arm clusters as a function of radius up to 6400m, replacing clusters with stations placed along the existing log spiral. <N> in the model name is a integer in the range (0, 8) which describes the radius up to which the unwrap has been carried out; N = 0 consists of just first ring of clusters unwrapped and N = 8 has all 9 clusters unwrapped.
2. model02_r<N>: Unwraps (replaces) spiral arm clusters as a function of radius up to 6400m, replacing clusters with stations placed in circles at the radius of the cluster centre. As for model01_r<N>, <N> in the model name is a integer in the range (0, 8) which describes the radius up to which the unwrap has been carried out; <N> = 0 consists of just first ring of clusters unwrapped and <N> = 8 has all 9 clusters unwrapped.
3. model03_r<N>: This is a hybrid of model01_r<N> and model02_r<N> using model02_r<N> up to and including the 5th set of spiral clusters and model01_r<N> for clusters at larger radii.

Metrics & analysis plots (current list)

• Cable length increase from the reference v5 layout.
• PSFRMS
• Azimuthally averaged PSF profile.
• (UVGAP)
• UV histogram (brightness sensitivity)
• UV coverage
• PSF images

Notes / TODO

• Cable length metric might need optimising slightly.
• UVGAP Python (callable) code will be needed if we want to expand the number of telescopes and not go via iantconfig manually.
• Currently PSF analysis is done with natural (and/or) uniform weighting. Hopefully this is sufficient.