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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LII3AFZDNLRV4CBD6FYO6UTIJFQFWZUD/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "LII3AFZDNLRV4CBD6FYO6UTIJFQFWZUD",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/LII3AFZDNLRV4CBD6FYO6UTIJFQFWZUD/?format=api",
    "sender": {
        "address": "tjjapha (a) earthlink.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "ANTHONY JAPHA",
    "subject": "[amsat-bb]  S-Band and Eagle",
    "date": "2006-09-12T21:18:26Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/DGNBGP2AY6KKBJZTFAKZMHFJPBRWBHQG/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "There have been so many thoughtful comments on the S band question that\nit's been fun to follow the thread.  I'd like to chime in.\n\nI bought S band gear just before AO40 went south.  Not a lot of equipment,\njust a W7LRD dish with helix, a K5GNA converter, and a few odds and ends. \nUnfortunately, I never got to put them on the air.  Now I try out the\nconverter on AO-51when the mode is right.  I live in Manhattan, operate\nportable, and have a fairly decent QTH to get maybe a 100 degree window. \nMode V/U on AO-51 is a breeze with an HT, and FO-29 provides the occasional\nDX QSO using a pair of FT817s and an old 20 watt 2 mtr. amp.\n\nS-band here is nearly hopeless.  I live in a census tract that contains 10\ncity blocks.  There are 15,000 people in 9,000 households.  I would not be\nsurprised to find that 75% of those households had some sort of 2.4 Ghz\ndevice!  The bird can be directly overhead, but only the rare station pops\nup out of the noise for a few syllables at a time.  Using an Arrow ant. for\n435 Mhz., by contrast, much is heard on both FO-29 and AO-51.\n\nThat is my experience.  It is an anecdote, to be added to the many others\nthat have been shared.  I would be shocked if a satellite designer paid\nmuch attention to it if he had some more aggregate data on which to base a\ndesign decision.  It's a shred of evidence, no more, no less.  Even a cub\nreporter shouldn't write about it without doing some research into what\nothers are experiencing and whether my experience squares with what\ninformed people and the data suggest.  For one thing, my QTH probably isn't\ntypical, to say the least.  The designers of Eagle probably aren't hung up\non making sure that users in my position should be able to use all the\nbird's modes.  They probably don't design for the superstations either. \nThe job is to make the bird useful to the greatest number of possible users\ngiven the budgets they face (money, power, size, etc.).\n\nThe evidence I've seen in these exchanges seems to favor the designers by a\nlarge margin.  They have cited their evaluation of the available data\nregarding the present and future use of S band.  Are there data to the\ncontrary?  The fact that some stations can make it through a tough QRM\nsituation isn't very convincing.  It is the great majority of stations that\nshould be able to use the bird.  \n\nI have a couple of concerns.  Is the emphasis on making the bird accessible\nto very modestly equipped stations (like mine?!) going too far?   The\nbird's potential use in emergencies sounds farfetched to me.  Maybe if\nwe're down to a choice between the bird and a semaphore!\n\nI'd also like to know much more about the ground equipment required for S/C\nmode.  How will it interface with existing equipment in the shack?  Are\nthese new pieces of gear add-ons to existing transceivers or do they stand\nalone?  What functions to they perform?  Sorry, but I'm not up on digital\nSSB and CW as you can see. \n\nFinally, is enough known about U/V to tell us now what ERP and receive\ncapability will be needed?  That is, how big will the antennas need to be?\n\nThanks for all the work being put into this by the design team.  If Eagle\nis going to fly any time soon, we've got to let them get on with it.\n\n73,\nTony, N2UN\nLM 183 \n\n",
    "attachments": []
}