{"action":"created","issue":{"url":"https://api.github.com/repos/iNavFlight/inav/issues/621","repository_url":"https://api.github.com/repos/iNavFlight/inav","labels_url":"https://api.github.com/repos/iNavFlight/inav/issues/621/labels{/name}","comments_url":"https://api.github.com/repos/iNavFlight/inav/issues/621/comments","events_url":"https://api.github.com/repos/iNavFlight/inav/issues/621/events","html_url":"https://github.com/iNavFlight/inav/issues/621","id":177943073,"number":621,"title":"Sonar originated altitude is (almost) always lower by few cm","user":{"login":"jflyper","id":14850998,"avatar_url":"https://avatars.githubusercontent.com/u/14850998?v=3","gravatar_id":"","url":"https://api.github.com/users/jflyper","html_url":"https://github.com/jflyper","followers_url":"https://api.github.com/users/jflyper/followers","following_url":"https://api.github.com/users/jflyper/following{/other_user}","gists_url":"https://api.github.com/users/jflyper/gists{/gist_id}","starred_url":"https://api.github.com/users/jflyper/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jflyper/subscriptions","organizations_url":"https://api.github.com/users/jflyper/orgs","repos_url":"https://api.github.com/users/jflyper/repos","events_url":"https://api.github.com/users/jflyper/events{/privacy}","received_events_url":"https://api.github.com/users/jflyper/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2016-09-20T01:52:05Z","updated_at":"2016-09-20T04:28:51Z","closed_at":null,"body":"As I was testing the sonar support for OMNIBUS F3, I came to notice that the distance reported by sonar is always shorter than the actual distance by 1~3cm.\r\n\r\nI took a quick look at the code, and found at least a couple of places where loss of significant digit is occurring (accounts for 2cm).\r\n\r\nI actually don't know if sonar is requested to generate a distance in this precision.\r\n\r\nAny thoughts?\r\n\r\nOh, and it came to me that we should have a variable to adjust the altitude based on the relative position of where the sonar is mounted on a vehicle."},"comment":{"url":"https://api.github.com/repos/iNavFlight/inav/issues/comments/248198554","html_url":"https://github.com/iNavFlight/inav/issues/621#issuecomment-248198554","issue_url":"https://api.github.com/repos/iNavFlight/inav/issues/621","id":248198554,"user":{"login":"jflyper","id":14850998,"avatar_url":"https://avatars.githubusercontent.com/u/14850998?v=3","gravatar_id":"","url":"https://api.github.com/users/jflyper","html_url":"https://github.com/jflyper","followers_url":"https://api.github.com/users/jflyper/followers","following_url":"https://api.github.com/users/jflyper/following{/other_user}","gists_url":"https://api.github.com/users/jflyper/gists{/gist_id}","starred_url":"https://api.github.com/users/jflyper/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jflyper/subscriptions","organizations_url":"https://api.github.com/users/jflyper/orgs","repos_url":"https://api.github.com/users/jflyper/repos","events_url":"https://api.github.com/users/jflyper/events{/privacy}","received_events_url":"https://api.github.com/users/jflyper/received_events","type":"User","site_admin":false},"created_at":"2016-09-20T04:28:51Z","updated_at":"2016-09-20T04:28:51Z","body":"Okay. Then I would look into the occasional jump; 350cm at 10cm and a like."}}
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