{"action":"created","issue":{"url":"https://api.github.com/repos/lsst/sims_maf/issues/55","labels_url":"https://api.github.com/repos/lsst/sims_maf/issues/55/labels{/name}","comments_url":"https://api.github.com/repos/lsst/sims_maf/issues/55/comments","events_url":"https://api.github.com/repos/lsst/sims_maf/issues/55/events","html_url":"https://github.com/lsst/sims_maf/pull/55","id":120874401,"number":55,"title":"Feature/sim 1639 more astrometry","user":{"login":"yoachim","id":3673733,"avatar_url":"https://avatars.githubusercontent.com/u/3673733?v=3","gravatar_id":"","url":"https://api.github.com/users/yoachim","html_url":"https://github.com/yoachim","followers_url":"https://api.github.com/users/yoachim/followers","following_url":"https://api.github.com/users/yoachim/following{/other_user}","gists_url":"https://api.github.com/users/yoachim/gists{/gist_id}","starred_url":"https://api.github.com/users/yoachim/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yoachim/subscriptions","organizations_url":"https://api.github.com/users/yoachim/orgs","repos_url":"https://api.github.com/users/yoachim/repos","events_url":"https://api.github.com/users/yoachim/events{/privacy}","received_events_url":"https://api.github.com/users/yoachim/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"rhiannonlynne","id":1855711,"avatar_url":"https://avatars.githubusercontent.com/u/1855711?v=3","gravatar_id":"","url":"https://api.github.com/users/rhiannonlynne","html_url":"https://github.com/rhiannonlynne","followers_url":"https://api.github.com/users/rhiannonlynne/followers","following_url":"https://api.github.com/users/rhiannonlynne/following{/other_user}","gists_url":"https://api.github.com/users/rhiannonlynne/gists{/gist_id}","starred_url":"https://api.github.com/users/rhiannonlynne/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rhiannonlynne/subscriptions","organizations_url":"https://api.github.com/users/rhiannonlynne/orgs","repos_url":"https://api.github.com/users/rhiannonlynne/repos","events_url":"https://api.github.com/users/rhiannonlynne/events{/privacy}","received_events_url":"https://api.github.com/users/rhiannonlynne/received_events","type":"User","site_admin":false},"milestone":null,"comments":2,"created_at":"2015-12-07T21:42:01Z","updated_at":"2015-12-11T23:44:52Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/lsst/sims_maf/pulls/55","html_url":"https://github.com/lsst/sims_maf/pull/55","diff_url":"https://github.com/lsst/sims_maf/pull/55.diff","patch_url":"https://github.com/lsst/sims_maf/pull/55.patch"},"body":"Cooked up at the Tucson cadence workshop:  Two new astrometry metrics that check for any possible degeneracies.  ParallaxCoverageMetric checks that the parallax factor is adequately sampled (e.g., that the observations are not all taken at the same time of year, which would cause the parallax factor and position fit to become degenerate).  ParallaxHADegenMetric measures the correlation between the parallax factor and hour angle. If those are highly correlated (or anit-correlated), there could be a degeneracy when fitting the parallax and DCR offset."},"comment":{"url":"https://api.github.com/repos/lsst/sims_maf/issues/comments/164082064","html_url":"https://github.com/lsst/sims_maf/pull/55#issuecomment-164082064","issue_url":"https://api.github.com/repos/lsst/sims_maf/issues/55","id":164082064,"user":{"login":"rhiannonlynne","id":1855711,"avatar_url":"https://avatars.githubusercontent.com/u/1855711?v=3","gravatar_id":"","url":"https://api.github.com/users/rhiannonlynne","html_url":"https://github.com/rhiannonlynne","followers_url":"https://api.github.com/users/rhiannonlynne/followers","following_url":"https://api.github.com/users/rhiannonlynne/following{/other_user}","gists_url":"https://api.github.com/users/rhiannonlynne/gists{/gist_id}","starred_url":"https://api.github.com/users/rhiannonlynne/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rhiannonlynne/subscriptions","organizations_url":"https://api.github.com/users/rhiannonlynne/orgs","repos_url":"https://api.github.com/users/rhiannonlynne/repos","events_url":"https://api.github.com/users/rhiannonlynne/events{/privacy}","received_events_url":"https://api.github.com/users/rhiannonlynne/received_events","type":"User","site_admin":false},"created_at":"2015-12-11T23:44:52Z","updated_at":"2015-12-11T23:44:52Z","body":"Looks good. "}}