T1 Make a DFT dirty beam and image.ipynb

Follow the steps to make a DFT dirty beam and a DFT dirty image.

T2 Make dirty map and dirty beam using the least-misfit gridding function.ipynb

• Gridding process using the least-misfit gridding function,
• make a dirty map and a dirty beam,
• compare the DFT and FFT dirty images.

T3 Make dirty map and dirty beam using spheroidal function.ipynb

• Gridding process using the spheroidal gridding function,
• make a dirty map and a dirty beam,
• compare the DFT and FFT dirty images.

T4 Gridding with a look-up table using the least-misfit gridding function.ipynb

• Gridding using a look-up table with the least-misfit gridding function,
• make a dirty map and a dirty beam,
• compare the DFT and FFT dirty images,
• nearest neighbour/bilinear interpolation.

T5 Gridding with a gridding function with an odd width.ipynb

• Gridding process using the least-misfit gridding function, but with an odd width,
• make a dirty map and a dirty beam,
• compare the DFT and FFT dirty images.

Many thanks to Feng Gao and Will Barker for their support.

Reference:

• Sze Meng Tan's Repository https://github.com/SzeMengTan/OptimalGridding/tree/3d3a1f5a15d4f70bcb89aa94f8cb55d369a8b3fb

• "Optimal gridding and degridding in radio interferometry imaging" by Haoyang Ye, Stephen F. Gull, Sze M. Tan and Bojan Nikolic, accepted by the Monthly Notices of the Royal Astronomical Society. https://arxiv.org/abs/1906.07102

🍵 Haoyang Ye

Email: [email protected]

Website: www.haoyangye.com/Home