Required features SKA DC-3

[rohitcbscient]

For SKADC-3, we design the following experiments.

• [x] 1. Imaging with OSKAR, make a proper interface. We should be able to select the cell size at will. (#261)
• [x] #319
• [ ] 3. Skymodel=(delta Tb EOR Signal + foreground) + noise (instrumental karabo). Make 10,000 skymodels from the 10,000 lightcones from the fast 21 simulations. In frequency, there are about 500-1000 channels.
• [ ] 4. Each simulation must be done for 1000 hours of integration. Test the single-channel simulation vs multiple channels for the computation and data writing. Change the long observation module to 4 hours of everyday observation and 250 days. -2 hours to +2 hours from the local zenith. See #284 #323
  • [ ] Pixel is scaled with the frequency. The pixel number remains the same.
  • [ ] Requirement: beam size information in the output fits files.
  • [x] Implement Beam for SKA-Low #322
• [ ] 5. Point Source Subtraction in visibility space #534
• [ ] 6. Write a function to convert co-moving coordinates to spatial scales. Eq. 7 & 8 in https://arxiv.org/abs/astro-ph/0603518v3.
• [ ] 7. #66 (low priority)

[rohitcbscient]

1. Point Source model from GLEAM catalog
2. Galactic gyro-synchrotron model: https://arxiv.org/pdf/1607.02779.pdf
   • Foreground Cube: https://github.com/sambit-giri/tools21cm
3. Include tools21 into karabo (#12)