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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WKEJLLZ6JJNGDP5NX3JEYX27MOLFGVX3/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CAKXf1rEVx6kzY5h31C5=vfH1YK9TfguF8SjoXXjxmmzhHVocxQ@mail.gmail.com",
    "message_id_hash": "WKEJLLZ6JJNGDP5NX3JEYX27MOLFGVX3",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/CTSZOVEIHWMXWZSV3VA6I3LJXFXXYMFW/?format=api",
    "sender": {
        "address": "wouterweg (a) gmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Wouter Weggelaar",
    "subject": "Re: [amsat-bb] A0-73",
    "date": "2018-12-18T13:54:21Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VQUGEMECTJAG3GDVYU2ZJ4VNOQNRS6F7/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "First of all I would like to thank Colin for his many hours of work\nanalyzing the behaviour of AO-73.\nKeep in mind that FUNcube uses passive stabilization and that the team\ncan not influence the attitude and spin rate of the satellite.\n\nWe have done some experiments, like Colin already mentioned, and at\nthe moment the satellite is placed in to full time transponder mode\nfor the holidays.\nSo expect the transponder to be on and the telemetry to be 30mW.\n\n73\n\nWouter PA3WEG\nFUNcube team\n\nOn Mon, Dec 17, 2018 at 11:38 PM Colin Hurst <[email protected]> wrote:\n>\n> Some personal thoughts on this subject.\n> On the 14th December AO-73 was placed back in Transponder mode after having\n> been in Educational Mode for many months to examine the performance of AO-73\n> in full sun. AO-73 is currently experiencing its second full sun encounter\n> which will last until April 2019.\n> The first experience was earlier this year when a number of observations\n> were noted in AO-73's attitude. A controlled experiment has been undertaken\n> during the first stage of this current full sun encounter to understand and\n> quantify those previous observations.\n>\n> Simply put, while in full sun AO-73 slowly speeds up due to Propeller Effect\n> and reaches a point where due to an offset Centre of Gravity the Nutation\n> becomes excessive and AO-73 finally ceases to rotate about its Z-Z axis.\n>\n>\n> Points of clarification.\n> Educational Mode 300 milli-watts Beacon downlink.\n> Transponder Mode 30 milli-watt Beacon.\n> Propeller Effect occurs from the Materials Experiment on AO-73. Schools STEM\n> Initiative.\n> https://funcube.org.uk/education-outreach/\n> The fading you are currently seeing is medium to high Nutation (Wobble about\n> the Z-Z axis).\n> AO-73 has not ceased to rotate about the Z-Z axis or start tumbling.\n> For past history please refer to Mike's Blog and in particular.\n> http://www.dk3wn.info/p/?cat=79\n>\n> 73 Colin VK5HI\n>\n> -----Original Message-----\n> From: AMSAT-BB [mailto:[email protected]] On Behalf Of Jean Marc\n> Momple\n> Sent: Tuesday, 18 December 2018 04:15\n> To: Hasan al-Basri\n> Cc: [email protected]; [email protected]\n> Subject: Re: [amsat-bb] A0-73\n>\n> Dear All,\n>\n> Also noticed quite a difference on AO-73 reception this side, it used to be\n> 100% reliable but less decodes theses day, I have not investigate same but\n> for sure there is a degradation somehow.\n>\n> Just FYI\n>\n> 73\n>\n>\n> Jean Marc (3B8DU)\n>\n> > On Dec 17, 2018, at 8:35 PM, Hasan al-Basri <[email protected]>\n> wrote:\n> >\n> > Agreed, severe QSB even with RHC rx antenna.\n> > Also, I'm not rx anywhere near the number of TLM frames since the xponder\n> > was turned on.\n> >\n> >\n> > Hasan\n> >\n> >\n> > On Mon, Dec 17, 2018 at 7:19 AM Cor van Heiningen <\n> > [email protected]> wrote:\n> >\n> >> Have the last days qso s made via AO-73 sat the rx goes from s 9 to 0\n> >> sometimes with a lot of QRM.\n> >> I think the sat turned around its axis faster than a few months ago.\n> >> Many stations have problems with QSO S via this sat.\n> >> 73\n> >> PE1NIL\n>\n>\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",
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