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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/RN5GVLLTEOBFD2KSNB3MMOPFDSJTUIUB/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "RN5GVLLTEOBFD2KSNB3MMOPFDSJTUIUB",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/5SLKFXHN3DUACUJKVVIY3KEAXJDFTGSQ/?format=api",
    "sender": {
        "address": "ve9qrp (a) gmail.com",
        "mailman_id": "4d6061838db34aba9a1c4722addebfaf",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/4d6061838db34aba9a1c4722addebfaf/emails/?format=api"
    },
    "sender_name": "Bruce Robertson",
    "subject": "[amsat-bb] Re: Video of indoor, ultra-cheap cubesat operations",
    "date": "2008-01-30T02:07:35Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LBCTSMF5S5KL5MJRO6E57OLIHSXID6BA/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Continuing this series of observations, using very simple antennas\nindoors with my FT-817:\n\nI worked on a eastward 5 deg. max elevation pass of XI-V, or CO-58,\nthis evening. This cubesat has a nominal output of 80mW. Its periodic\ntransmission makes it less ideal than CO-55 for this sort of\nexperimentation, but the break between transmissions is not as long as\nLO-19's: in my experience with this low pass it never doppler-shifted\nout of the 500 Hz filter while silent. I had to have only the exterior\nwall between me and the bird for it to be reliably heard.\n\nIf I've done the math right, this is a free-space path loss of about\n153 dB on a, roughly, +20 dBm signal, meaning that the receiver can\nhear down to at least -133 dBm at 500 Hz bandwidth (since we haven't\nfactored in the losses due to the indoor reception).\n\nA dipole mounted directly on a BNC copied VO-52's 2m downlink quite\nwell for a couple of minutes, both from the second storey of our home\nand from the first. By the time I found my video camera, there was\napparently no activity. Possibly the dipole's pattern got in the way\nof reception.\n\nI would be very interested to hear if anyone else has had success with\nsimilar minimal equipment. I hope to take this setup to a more urban\nenvironment and see if it will still work, say, outdoors.\n\n73, Bruce\nVE9QRP\n",
    "attachments": []
}