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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MEV66CVG5HYMJSI6JJC3Q465FBO4PP65/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "MEV66CVG5HYMJSI6JJC3Q465FBO4PP65",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/MEV66CVG5HYMJSI6JJC3Q465FBO4PP65/",
    "sender": {
        "address": "maisel (a) lobo.net",
        "mailman_id": "1b85f9b299024ea0ada887f9f54eef58",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/1b85f9b299024ea0ada887f9f54eef58/emails/"
    },
    "sender_name": "Lee Maisel",
    "subject": "[amsat-bb] Re: AO-73 over UK",
    "date": "2014-05-02T06:26:37Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Ah!\n\nTHanks for the explanation!  I wondered!\n\nLee\nW5LMM\n\n\nOn 5/1/2014 11:41 PM, Paul Stoetzer wrote:\n> Well, FUNcube's primary mission is education. When it's in educational\n> mode, during the day, it provides a strong 300 mW telemetry signal\n> easily received by simple antenna and receiver equipment. Amateur mode\n> is turned on at night (when schools aren't expected to be in session),\n> the telemetry is only 30 mW and the rest of the power is allocated to\n> the transponder. In an 11am/11pm sun synchronous orbit, this generally\n> works well. However, for a couple of months around the summer\n> solstice, the satellite is in sunlight much more often, so this\n> solution doesn't always work. It's more of a problem in the northern\n> hemisphere since there is a far larger population at higher northern\n> latitudes than higher southern latitudes.\n>\n> Since schools are also not expected to be in session on the weekends,\n> the controllers have been turning on amateur mode continuously during\n> weekends, allowing use of the transponder during the day and night.\n> Transponder mode is actually easier on the satellite's power system as\n> the average power output is somewhat lower and varies depending on use\n> of the transponder. This has presented another challenge as FUNcube\n> has been running much cooler than expected and they have had to keep\n> an eye on running the satellite in transponder mode to make sure the\n> battery temperature doesn't fall below -5 degrees Celsius while\n> operating in full-time transponder mode.\n>\n> The best solution, of course, would be a computerized schedule loaded\n> into the spacecraft's systems. However, FUNcube uses an extremely\n> simple design and it's onboard control system does not have this\n> capability.\n>\n> 73,\n>\n> Paul, N8HM\n>\n> On Fri, May 2, 2014 at 12:04 AM, Lee Maisel <[email protected]> wrote:\n>> WTF?  It shuts off when it sees sunlight??  That seems absolutely opposite\n>> of normal behavior of a solar powered bird.\n>>\n>> W5LMM\n>>\n>>\n>>\n>> On 4/30/2014 6:05 PM, Paul Stoetzer wrote:\n>>> Hi Peter,\n>>>\n>>> The AO-73 transponder shuts off as soon as it sees sunlight. That is why\n>>> your signal suddenly disappeared.\n>>>\n>>\n>> ---\n>> This email is free from viruses and malware because avast! Antivirus\n>> protection is active.\n>> http://www.avast.com\n>>\n\n\n---\nThis email is free from viruses and malware because avast! Antivirus protection is active.\nhttp://www.avast.com\n\n",
    "attachments": []
}