{"action":"created","issue":{"url":"https://api.github.com/repos/mavlink/qgroundcontrol/issues/6907","repository_url":"https://api.github.com/repos/mavlink/qgroundcontrol","labels_url":"https://api.github.com/repos/mavlink/qgroundcontrol/issues/6907/labels{/name}","comments_url":"https://api.github.com/repos/mavlink/qgroundcontrol/issues/6907/comments","events_url":"https://api.github.com/repos/mavlink/qgroundcontrol/issues/6907/events","html_url":"https://github.com/mavlink/qgroundcontrol/pull/6907","id":365549915,"node_id":"MDExOlB1bGxSZXF1ZXN0MjE5NDQ0MjQz","number":6907,"title":"Add support for specifying fixed RTK base position","user":{"login":"DonLakeFlyer","id":5876851,"node_id":"MDQ6VXNlcjU4NzY4NTE=","avatar_url":"https://avatars3.githubusercontent.com/u/5876851?v=4","gravatar_id":"","url":"https://api.github.com/users/DonLakeFlyer","html_url":"https://github.com/DonLakeFlyer","followers_url":"https://api.github.com/users/DonLakeFlyer/followers","following_url":"https://api.github.com/users/DonLakeFlyer/following{/other_user}","gists_url":"https://api.github.com/users/DonLakeFlyer/gists{/gist_id}","starred_url":"https://api.github.com/users/DonLakeFlyer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DonLakeFlyer/subscriptions","organizations_url":"https://api.github.com/users/DonLakeFlyer/orgs","repos_url":"https://api.github.com/users/DonLakeFlyer/repos","events_url":"https://api.github.com/users/DonLakeFlyer/events{/privacy}","received_events_url":"https://api.github.com/users/DonLakeFlyer/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":8,"created_at":"2018-10-01T16:51:31Z","updated_at":"2018-10-05T16:29:57Z","closed_at":"2018-10-04T20:02:36Z","author_association":"CONTRIBUTOR","pull_request":{"url":"https://api.github.com/repos/mavlink/qgroundcontrol/pulls/6907","html_url":"https://github.com/mavlink/qgroundcontrol/pull/6907","diff_url":"https://github.com/mavlink/qgroundcontrol/pull/6907.diff","patch_url":"https://github.com/mavlink/qgroundcontrol/pull/6907.patch"},"body":"This allows you to specify a fixed RTK base position and skip survey-in. If you have a valid survey-in \"Save Current Base Position\" will enable allowing you to copy the values from the survey-in to setttings.\r\n\r\nReplacement for #6868. Related to #6621.\r\n\r\n![screen shot 2018-10-01 at 9 49 36 am](https://user-images.githubusercontent.com/5876851/46302937-57c6a000-c55f-11e8-857a-4a56f6243438.png)\r\n"},"comment":{"url":"https://api.github.com/repos/mavlink/qgroundcontrol/issues/comments/427424211","html_url":"https://github.com/mavlink/qgroundcontrol/pull/6907#issuecomment-427424211","issue_url":"https://api.github.com/repos/mavlink/qgroundcontrol/issues/6907","id":427424211,"node_id":"MDEyOklzc3VlQ29tbWVudDQyNzQyNDIxMQ==","user":{"login":"mkunzBGC","id":21644074,"node_id":"MDQ6VXNlcjIxNjQ0MDc0","avatar_url":"https://avatars2.githubusercontent.com/u/21644074?v=4","gravatar_id":"","url":"https://api.github.com/users/mkunzBGC","html_url":"https://github.com/mkunzBGC","followers_url":"https://api.github.com/users/mkunzBGC/followers","following_url":"https://api.github.com/users/mkunzBGC/following{/other_user}","gists_url":"https://api.github.com/users/mkunzBGC/gists{/gist_id}","starred_url":"https://api.github.com/users/mkunzBGC/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mkunzBGC/subscriptions","organizations_url":"https://api.github.com/users/mkunzBGC/orgs","repos_url":"https://api.github.com/users/mkunzBGC/repos","events_url":"https://api.github.com/users/mkunzBGC/events{/privacy}","received_events_url":"https://api.github.com/users/mkunzBGC/received_events","type":"User","site_admin":false},"created_at":"2018-10-05T16:29:57Z","updated_at":"2018-10-05T16:29:57Z","author_association":"NONE","body":"@DonLakeFlyer Today I tested QGroundControl Development HEAD:defdcdc41 2018-10-04 14:37:54 -0700, which includes the option to save and restore the base station position. My setup consisted of a Here+ RTK base and rover module, both running the 1.40 firmware. The rover was connected to a 3DR Pixhawk running ArduCopter 3.5.5. Rover and base antenna were set up under open sky, elevated 2 and ~1.2 m from the ground, respectively. They were statically mounted at a distance of ~5m horizontally and ~1.5m vertically. The base station saw 20 satellites all the time, the rover used 15-19.\r\n\r\nDuring all testing I waited until RTK fixed mode before taking coordinates. I measured the position of the rover three times, restarting the rover and QGroundControl in between. Saving and restoring the base position worked as expected. The positions are within 2.5cm horizontally and 2 cm vertically to each other, which is a pretty good result.\r\n\r\nHowever, the determined base station altitude was strange in that it differed from the rover by more than 40m (268m for the base, 223.4m for the rover). I am at 50.909°N and 11.565°E if that matters.\r\n\r\nOne suggestion: When saving the base position, several messages pop up: \"Change of 'Base Position [Latitude/Longitude/Altitude/Accuracy]' value requires restart of QGroundControl to take effect\". I think this is not necessary until the \"Use specified base position\" radio button is activated.\r\n\r\nThanks for adding this useful feature!"}}
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