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GET /hyperkitty/api/list/[email protected]/email/XU4TQ7QNP4DM3CYJFVUD5YRDNJT7CYKY/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/XU4TQ7QNP4DM3CYJFVUD5YRDNJT7CYKY/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "XU4TQ7QNP4DM3CYJFVUD5YRDNJT7CYKY", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/XU4TQ7QNP4DM3CYJFVUD5YRDNJT7CYKY/", "sender": { "address": "pa3guo (a) upcmail.nl", "mailman_id": null, "emails": null }, "sender_name": "PA3GUO", "subject": "Re: [amsat-bb] Expectations...", "date": "2015-01-03T21:01:33Z", "parent": null, "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UIRF2LCYTYUVJLMUDU4IY3CD7QGZTFSB/" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Hi Kelly,\n\nRegarding APRS via the ISS;\n\nA busy channel ...\nWhen I use 100W into my 2x6 elements antenna (with doppler correction) I can always get over the ISS APRS station.\nWhen lowering to 5W I get a problem, likely due to many many stations in Europe all transmitting at the same time.\nNote: I don't run often with 100W, in fact I rarely use APRS at all.\n\nSo, it's a busy channel, see also here: http://www.ariss.net/index2.cgi\n00:00:57:07 : WB3FKP]CQ,RS0ISS*,qAR,KB3KBR-15::K8OE :35F here in Alden , PA - UR 599 today via ISS !\n00:00:57:10 : W3MAT]CQ,RS0ISS*,qAR,KB3KBR-15::WB3FKP :QSL Good Copy\n00:00:57:12 : WB3FKP]CQ,RS0ISS*,qAR,KB3KBR-15::Heard :K0HCV-9,NX9G,WB8JAY,W3MAT,K8OE,KB1CHU\nThat is 3 transmissions in 5 seconds (up and downlink means 6 transmissions in 5 seconds I believe).\nBut it does show the satellite (ISS) hears MANY stations at the same time.\nWatch the footprint, pick your time, eg when it is over a more quiet area but still in range for you.\n\nAntennas:\nThe ISS turns and its construction sometimes blocks/shield the antenna's.\nYou can see that during school contacts, when APRS and Voice run simultanious:\nhttps://www.youtube.com/watch?v=RfNM3bzRW_E\nSignal strengths varies independently on the 2 stations (watch the waterfall).\nIn fact I believe that compared to ~8 years ago, the fading due to the ISS construction itself has increased enormous.\n\nA lot of fun though!\nEven if nobody responds, if you hear your packet re-transmitted by ISS, you 'have been in space' already !!\n\nSuccess & have fun!\nHenk, PA3GUO\n", "attachments": [] }