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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/72INZ6OT5DIASF4X37O4JMKFX7APXPVR/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "72INZ6OT5DIASF4X37O4JMKFX7APXPVR",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/55WLVPSVAIUW3EQ24JE7V7SZ7WUD5D7N/?format=api",
    "sender": {
        "address": "kk5do (a) arrl.net",
        "mailman_id": "0afa6cdae1634381a4836e7e59977b8c",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/0afa6cdae1634381a4836e7e59977b8c/emails/?format=api"
    },
    "sender_name": "Bruce",
    "subject": "Re: [amsat-bb] Making the transponder sats as easy as the fm birds",
    "date": "2018-04-14T02:40:12Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/55WLVPSVAIUW3EQ24JE7V7SZ7WUD5D7N/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/CNS3ACES6SXF37I3DTLVUF27ZFA7ASM7/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Sorry, this theory of thought is incorrect. You must adjust the higher \nof the two frequencies as it is most affected by Doppler. The true way \nto adjust is really to adjust both frequencies, however in the absence \nof computer control of both frequencies, you adjust the higher. Thus, if \nit is the receive frequency, then you adjust the receive, if it is the \ntransmit, then you adjust the transmit. Holding the transmit frequency \non the wrong band will cause you to walk across all the other QSO's \ntaking place which is not a good practice.\n\n73...bruce\n\nOn 4/13/2018 8:41 PM, Eric Fort wrote:\n> I’ve had an idea for a long time as to making the satellites with linear transponders as easy to use as the FM “easy sats “.  Consider the following:\n>\n> As I understand it, the goal is to adjust your transmitter such that your frequency at the satellite is constant.\n>\n> Our tracking program gives us range to the satellite and its velocity relative to us given our location and the orbital parameters. From this we should have computed Doppler for both transmit and receive.\n>\n> We also know the frequency at the satellite of the various beacons onboard. From this we can measure the doppler and work the other direction\n>\n> If we transmit a subaudable tone of known frequency we should be able to adjust the rx automatically by tracking the tone. (Acssb)\n>\n> Given these multiple ways of setting our tx/rx frequencies for our location can this not simply be automated to such a degree as to simply specify an offset from the beacon and operate as if it were a regular predictable opening on hf?\n>\n> Af6ep\n>\n> Sent using SMTP.\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n\n\n-- \n\nBruce Paige, KK5DO\n                      \nAMSAT Director Contests and Awards\nAMSAT Board Member 2016-2018\n   \nARRL Awards Field Checker (WAS, 5BWAS, VUCC), VE\n           \nHouston AMSAT Net - Wed 0100z on Echolink - Conference *AMSAT*\nAlso live streaming MP3 at http://www.amsatnet.com\nPodcast at http://www.amsatnet.com/podcast.xml or iTunes\n               \nLatest satellite news on the ARRL Audio News\nhttp://www.arrl.org\n\nAMSAT on Twitter http://www.twitter.com/amsat\n\n\n",
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