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GET /hyperkitty/api/list/[email protected]/email/EGY7WVKAYQ6ERWGT6WGOGJGOYUJ6E5AN/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/EGY7WVKAYQ6ERWGT6WGOGJGOYUJ6E5AN/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "EGY7WVKAYQ6ERWGT6WGOGJGOYUJ6E5AN", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/GQN66W4DHOQJYEXDIZCCLWG3525EQ6AV/", "sender": { "address": "rwmcgwier (a) comcast.net", "mailman_id": null, "emails": null }, "sender_name": "Robert McGwier", "subject": "[eagle] Re: Where we're heading for bands and services", "date": "2006-09-25T12:44:00Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/BFFIAA6JTHMKZ6V2PUWJOEJNW5HMR4JQ/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Lyle Johnson wrote:\n>\n>> If we don't \"promise\" a performance level, then we must face the \n>> problem that Franklin pointed out with AO-40 -- a set of realistic \n>> user requirements was never presented, so everyone was just flying \n>> blind.\n>\n> I think we need to promise a field strength (flux density, whatever \n> the politically correct term is these days :-) on the ground for a \n> given uplink power by the user, or its equivalent. We can't control \n> the user's noise environment, but we sure better be able to predict \n> our downlink and publish it and meet it. And don't forget to add 6 to \n> 8 dB of loss just because, since I seem to recall we've nearly always \n> been 6 to 8 dB shy of our expectatins in the past...\n>\n> 73,\n>\n> Lyle KK7P\n>\n>\n\nThis is misunderstood. No promised performance level means \"We are \nnot promising this will work over 70+% of the orbit and with a few watt \nstation to a 0.6m dish\". Not as in \"we ain't even gonna measure \nit\". All performances are to be measured. The L performance goal is \n\"best achievable within the constraints\".\n\nBob\n\n\n-- \nAMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,\nNJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman\n\"You see, wire telegraph is a kind of a very, very long cat.\nYou pull his tail in New York and his head is meowing in Los\nAngeles. Do you understand this? And radio operates exactly\nthe same way: you send signals here, they receive them there.\nThe only difference is that there is no cat.\" - Einstein\n\n", "attachments": [] }