{"action":"created","issue":{"url":"https://api.github.com/repos/gssti-omnibus/workshop/issues/1","repository_url":"https://api.github.com/repos/gssti-omnibus/workshop","labels_url":"https://api.github.com/repos/gssti-omnibus/workshop/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/gssti-omnibus/workshop/issues/1/comments","events_url":"https://api.github.com/repos/gssti-omnibus/workshop/issues/1/events","html_url":"https://github.com/gssti-omnibus/workshop/issues/1","id":309721733,"number":1,"title":"SARG: Modelling Kutunse Primary Beams from Simulations I","user":{"login":"philusnarh","id":8245353,"avatar_url":"https://avatars1.githubusercontent.com/u/8245353?v=4","gravatar_id":"","url":"https://api.github.com/users/philusnarh","html_url":"https://github.com/philusnarh","followers_url":"https://api.github.com/users/philusnarh/followers","following_url":"https://api.github.com/users/philusnarh/following{/other_user}","gists_url":"https://api.github.com/users/philusnarh/gists{/gist_id}","starred_url":"https://api.github.com/users/philusnarh/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/philusnarh/subscriptions","organizations_url":"https://api.github.com/users/philusnarh/orgs","repos_url":"https://api.github.com/users/philusnarh/repos","events_url":"https://api.github.com/users/philusnarh/events{/privacy}","received_events_url":"https://api.github.com/users/philusnarh/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2018-03-29T11:40:47Z","updated_at":"2018-04-11T20:41:38Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"**Sim 1: Using OSKAR**\r\n\r\n1. _Geometrical model of Kutunse dish_\r\n\r\n- Consider the dish as a collection of dipoles;\r\n- Assume the radial distribution of the dipoles to be a Super-Gaussian; (Note: This will mimic an aperture illumination of the dish)\r\n- Introduce errors in the dipole orientations to distort the main reflector\r\n- Introduce phase error to also distort the beam (this will introduce feed displacement)\r\n- remove the supporting structures (i.e. the struts and secondary reflector)\r\n- vary the size of the secondary reflector\r\n\r\n2. _Produce Complex beams_\r\n\r\n- Refer to Jones matrix\r\n\r\n3. _Produce Complete beams_\r\n- Refer to Mueller matrix\r\n\r\n4. _Measure the Intrinsic Polarisation Leakage (IXR)_\r\n\r\n5. _Estimate the FWHM across all frequencies (5 - 6.7 GHz)_\r\n\r\n6. _Reconstruct the simulated beam models_\r\n\r\n- Apply Zernike Moments Using the strongest Coefficients\r\n- Apply SVD using fewer eigenvalues for reconstruction.\r\n\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/gssti-omnibus/workshop/issues/comments/380588837","html_url":"https://github.com/gssti-omnibus/workshop/issues/1#issuecomment-380588837","issue_url":"https://api.github.com/repos/gssti-omnibus/workshop/issues/1","id":380588837,"user":{"login":"akotodanso","id":10991984,"avatar_url":"https://avatars2.githubusercontent.com/u/10991984?v=4","gravatar_id":"","url":"https://api.github.com/users/akotodanso","html_url":"https://github.com/akotodanso","followers_url":"https://api.github.com/users/akotodanso/followers","following_url":"https://api.github.com/users/akotodanso/following{/other_user}","gists_url":"https://api.github.com/users/akotodanso/gists{/gist_id}","starred_url":"https://api.github.com/users/akotodanso/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/akotodanso/subscriptions","organizations_url":"https://api.github.com/users/akotodanso/orgs","repos_url":"https://api.github.com/users/akotodanso/repos","events_url":"https://api.github.com/users/akotodanso/events{/privacy}","received_events_url":"https://api.github.com/users/akotodanso/received_events","type":"User","site_admin":false},"created_at":"2018-04-11T20:41:38Z","updated_at":"2018-04-11T20:41:38Z","author_association":"NONE","body":"Are the quadripod legs that huge. Can we also look at from the angle where some of the signals hitting the legs bounces back into the dish, and what. Say let's consider 5 percent of the signals bouncing back to add to the signals and the effect it will have."}}
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