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GET /hyperkitty/api/list/[email protected]/email/BR6LVWOGWZFLAZQWEYAWSI7TDA4V4NEC/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/BR6LVWOGWZFLAZQWEYAWSI7TDA4V4NEC/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "CACZz0S30duRCNUCWer+-GaXeoziV_m0OCWhfB0Tx90Ja3pwhpQ@mail.gmail.com", "message_id_hash": "BR6LVWOGWZFLAZQWEYAWSI7TDA4V4NEC", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/BR6LVWOGWZFLAZQWEYAWSI7TDA4V4NEC/?format=api", "sender": { "address": "ks1g04 (a) gmail.com", "mailman_id": "30590cddbe684a52a5c3c945059cdd06", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/30590cddbe684a52a5c3c945059cdd06/emails/?format=api" }, "sender_name": "Stephan Greene", "subject": "Re: [amsat-bb] when are TLE's too old to use?", "date": "2018-05-15T00:29:13Z", "parent": null, "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "After reading Ray's reminder that the old kep bulletins are online, I\ntried an experiment running SatPC32 WinAOS for a 24 hour period using the\ncurrent keps (from last Friday's bulletin) and a set from the end of March\n(~45 days, which is about how many days there are until Field Day give or\ntake). Summary of results for all the regularly operating FM and SSB\nsatellites I can reach here and ISS:\n\n78 passes at 5 deg or better in 24 hours\nExcluding ISS, largest AOS difference was 1 minute (assuming SatPC32 rounds\nto nearest minute, call it 1:30).\nDifferences in predicted period (length) of pass were 1 minute, including\nISS; roughly evenly distributed between shorter and longer.\nDifferences in predicted max elevation was up to 7 degrees, average was\n0.95 deg. The largest differences were associated with higher elevation\npasses, so not a big impact on ability to use.\n\nI didn't check for horizon skimmers where a small change in the\ncalculations could result in no pass or a marginal pass.\n\nConclusion: For general planning purposes, keplerian element data is\nuseful at least 1.5 months out. Possibly longer. I'd be much more careful\nfor planning a max distance attempt (horizon skimmers at both ends) and old\nkeps are probably useless for computer-control of radios and antennas.\n\nAnd my planning for Field Day is going to be relatively unchanged.\n\n73 Steve KS1G\n", "attachments": [] }