{"action":"created","issue":{"url":"https://api.github.com/repos/PX4/Firmware/issues/3683","repository_url":"https://api.github.com/repos/PX4/Firmware","labels_url":"https://api.github.com/repos/PX4/Firmware/issues/3683/labels{/name}","comments_url":"https://api.github.com/repos/PX4/Firmware/issues/3683/comments","events_url":"https://api.github.com/repos/PX4/Firmware/issues/3683/events","html_url":"https://github.com/PX4/Firmware/issues/3683","id":131854577,"number":3683,"title":"LPE X-Y Position estimation based on Flow not in correct units","user":{"login":"ecmnet","id":7580193,"avatar_url":"https://avatars.githubusercontent.com/u/7580193?v=3","gravatar_id":"","url":"https://api.github.com/users/ecmnet","html_url":"https://github.com/ecmnet","followers_url":"https://api.github.com/users/ecmnet/followers","following_url":"https://api.github.com/users/ecmnet/following{/other_user}","gists_url":"https://api.github.com/users/ecmnet/gists{/gist_id}","starred_url":"https://api.github.com/users/ecmnet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ecmnet/subscriptions","organizations_url":"https://api.github.com/users/ecmnet/orgs","repos_url":"https://api.github.com/users/ecmnet/repos","events_url":"https://api.github.com/users/ecmnet/events{/privacy}","received_events_url":"https://api.github.com/users/ecmnet/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":18,"created_at":"2016-02-06T13:06:08Z","updated_at":"2016-02-07T16:09:05Z","closed_at":null,"body":"Although position hold is working basically, it seems as if the absolute units LPE estimates for local position in XY direction are not correct. Having moved the vehicle by about 1m, LPE shows a movement of about 0.2m. \r\n\r\nhttp://logs.uaventure.com/view/RBzbbkjLCfPtU69py7w5QQ#Local_X_PLOT\r\n\r\nTo achieve better position hold results, I need to tune PIDs, but I would like to do that based on correct estimations. "},"comment":{"url":"https://api.github.com/repos/PX4/Firmware/issues/comments/181040313","html_url":"https://github.com/PX4/Firmware/issues/3683#issuecomment-181040313","issue_url":"https://api.github.com/repos/PX4/Firmware/issues/3683","id":181040313,"user":{"login":"ecmnet","id":7580193,"avatar_url":"https://avatars.githubusercontent.com/u/7580193?v=3","gravatar_id":"","url":"https://api.github.com/users/ecmnet","html_url":"https://github.com/ecmnet","followers_url":"https://api.github.com/users/ecmnet/followers","following_url":"https://api.github.com/users/ecmnet/following{/other_user}","gists_url":"https://api.github.com/users/ecmnet/gists{/gist_id}","starred_url":"https://api.github.com/users/ecmnet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ecmnet/subscriptions","organizations_url":"https://api.github.com/users/ecmnet/orgs","repos_url":"https://api.github.com/users/ecmnet/repos","events_url":"https://api.github.com/users/ecmnet/events{/privacy}","received_events_url":"https://api.github.com/users/ecmnet/received_events","type":"User","site_admin":false},"created_at":"2016-02-07T16:09:05Z","updated_at":"2016-02-07T16:09:05Z","body":"Yes, as I've agreed before, Flow does NOT compensate flow integration (though it does for speed estimation, which is not used). But it is clear that the distance check in Flow does affect the flow massively in my surrounding (carpets). So I will stay with disabled check for now.\r\n\r\nCould you share some numbers, what is the achievable accuracy in poshold with LPE in your experience?"}}