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GET /hyperkitty/api/list/[email protected]/email/URRRU6SF5ZOBTYR4INFSHEUTNIQZ4DA4/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/URRRU6SF5ZOBTYR4INFSHEUTNIQZ4DA4/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "001101c6c7fe$bf1f2db0$0500a8c0@parents", "message_id_hash": "URRRU6SF5ZOBTYR4INFSHEUTNIQZ4DA4", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/TLR5R4PRXGZQJQ2MAKRLPRBKRE2CW46W/", "sender": { "address": "ka3hsw (a) earthlink.net", "mailman_id": null, "emails": null }, "sender_name": "George Henry", "subject": "[amsat-bb] Re: Accuracy?", "date": "2006-08-25T04:27:15Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TLR5R4PRXGZQJQ2MAKRLPRBKRE2CW46W/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "It depends on the level of automation of your station... if you are using \nfixed antennas, you only need enough accuracy to know when the satellite is \nin view. If you are using rotor control, it depends on the beamwidth of \nyour antennas ( the narrower the beamwidth, the more critical the aiming \nbecomes). If you are using doppler control, then very high accuracy is \nneeded: a few seconds of error can translate to several hundred hertz of \ndoppler shift on a high pass.\n\nI have my XP machines set to check an internet NTP server every 4 hours. \nFor Field Day, I use a GPS receiver to keep the PC clock dead on, and always \nuse GPS to set my station coordinates accurately when portable. And when in \ndoubt, I update my keps right before operating, and at least once a week \notherwise.\n\nGeorge, KA3HSW\n\n\n----- Original Message ----- \nFrom: \"Stargate\" <[email protected]>\nTo: \"Amsat-Bb\" <[email protected]>\nSent: Thursday, August 24, 2006 4:29 PM\nSubject: [amsat-bb] Accuracy?\n\n\n>I guess my question should be....How much accuracy is required for \n>satellite\n> communications?\n>\n>\n> Thanks,\n> RoD\n> KD0XX\n>\n\n", "attachments": [] }