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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/D4T45WMGB3VB2NA3DOIVY4N3K2HN2RGF/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "CAEKn9qYjm_1X61DCXX47bqFjCB+FLYrDNOqFES+N-kqrewyTKw@mail.gmail.com", "message_id_hash": "D4T45WMGB3VB2NA3DOIVY4N3K2HN2RGF", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/YVERDYRDOFKS5HRYEKUXYVHFSBXUPL37/?format=api", "sender": { "address": "davids (a) mediamachine.com", "mailman_id": "11b702aa77c64867a61ecd84f22b23de", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/11b702aa77c64867a61ecd84f22b23de/emails/?format=api" }, "sender_name": "David Spoelstra", "subject": "[AMSAT-BB] Re: Best Project first: SSTV", "date": "2021-07-20T16:14:55Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FSMMAB25O6BMOD54VF6MR2CSNACJPQEK/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OGPO2MLO6X52NJ6QPTVGB5VNXS36MURB/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Bob -\nI believe Tom is asking what format the SSTV is sent in. Like the ISS\nimages are PD120. I believe NO-104 images are sent in Robot 36 mode.\n-David, N9KT\n\nOn Tue, Jul 20, 2021 at 10:05 AM Tom Schuessler <[email protected]>\nwrote:\n\n> Barb, please remind us what SSTV mode is used on NO104?\n>\n> Sent from my iPhone\n>\n> > On Jul 19, 2021, at 18:28, Robert Bruninga <[email protected]> wrote:\n> >\n> > The only downside is that its orbit is at a 28 degree latitude and so is\n> > low on the southern horizon for northern states. Though the elevation\n> > goes up and down over a two week period by several degrees.\n> >\n> > Let me know that it is working. Oh, also, the pass has to be in the sun\n> > for power and for live images.\n> > bob\n> >\n> >> On Mon, Jul 19, 2021 at 4:03 PM David Spoelstra <\n> [email protected]> wrote:\n> >>\n> >> @WB4APR I didn't know that! When I read about the satellite initially I\n> thought that you only got an SSTV image if someone was transmitting one. I\n> didn't realize that it constantly transmitted what was in it's memory (at\n> least I'm guessing that). I'm going to try that ASAP and let my club know\n> too.\n> >> Thanks!\n> >> -David, N9KT\n> >>\n> >>> On Mon, Jul 19, 2021 at 1:43 PM Robert Bruninga <[email protected]>\n> wrote:\n> >>>\n> >>> We have both. To receive SSTV, the APRS PSAT2 satellite supports it\n> full time\n> >>> with an SSTV image once every 4 minutes full time 24/7/365.on 435.350\n> MHz.\n> >>>\n> >>> In addition, users can also uplink their own images to the SSTV\n> transponder\n> >>> on 29.481 MHz. See how on http://aprs.org/psat2.html\n> >>>\n> >>> The transponder is also available for PSK31 users. - Bob, WB4APR\n> >>>\n> >>> On Mon, Jul 19, 2021 at 1:13 PM GMM via AMSAT-BB <[email protected]>\n> wrote:\n> >>>> Best Project first:\n> >>>> If you have multiple projects and limited resources, you need to\n> choose the project that will be the most successful or Get the best bang\n> for the buck.\n> >>>> What are you goals for an Amateur-Radio project for ISS?\n> >>>>\n> >>>> #1, Generate interest in Amateur radio capabilities.\n> >>>> #2, Encourage Non-Amateur-radio people to possibly get-into the\n> Amateur-Radio or SWL Hobby.\n> >>>> #3, Get more people excited about the ISS and is open programs that\n> can allow the average person to participate.\n> >>>> #4, Provide the ISS crew with some entertaining and excitement about\n> their projects.\n> >>>> #5, Language universal projects work best.\n> >>>>\n> >>>> The APRS project has a low following and does not generate much\n> excitement or newspaper coverage.\n> >>>> SSTV does great and all 5 of the listed categories.\n> >>>> Why is SSTV better the APRS?\n> >>>> SSTV is a project that will cross over between two hobbies,\n> >>>> Short-wave-listening and Amateur radio. Most Short-wave-listening and\n> >>>> Amateur operators are capable of receiving and decoding SSTV signals.\n> >>>> With 10's of millions of SWL+AR stations receiving these signals\n> month after\n> >>>> month, you will see a huge interest in the abilities of Amateur Radio\n> on ISS.\n> >>>>\n> >>>> You must have heard the saying \"A picture is worth a thousand words\".\n> >>>> When MarexMG was running the SSTV Program in Space Station Mir, out\n> SSTV\n> >>>> images were showing up in magazines and newspapers around the world.\n> >>>>\n> >>>> When was the last time you saw a New paper or magazine story\n> >>>> [Non-ham] talking about APRS from ISS? Never!\n> >>>>\n> >>>> The MarexMG SSTV project was a huge hit. Schools around the world\n> >>>> were setting up receiving stations to receive the images. I remember\n> seeing\n> >>>> a new story showing how the Great-Lakes ices was changing week after\n> week,\n> >>>> based on images from Mir SSTV.\n> >>>>\n> >>>> If we want to build up a large amount of support for existing and\n> future\n> >>>> Amateur radio projects on ISS, then we need to put our best project\n> front and center.\n> >>>>\n> >>>> I am not talking about turning on SSTV for 1 or two weekend per year.\n> >>>> I am talking about turning it on for a FULL 6 consecutive months in a\n> row 24 hours a day, 7-days a week.\n> >>>\n> >>>> Image cycle duration:\n> >>>> Let's keep is Simple and Safe.\n> >>>> Recommended format:\n> >>>> To provide the greatest access and reduce Heat stress on the radio,\n> >>>> I recommend using SSTV format Robot-36.\n> >>>>\n> >>>> The reason for the low-quality Robot-36, is because the transmitting\n> time\n> >>>> is only about 36 seconds for each image. I know this is the lowest\n> quality\n> >>>> image format, but since it’s the shortest, we can keep the radio\n> cooler.\n> >>>>\n> >>>> All transmitters run MUCH hotter in Zero Gravity!\n> >>>> And if the ISS Air pressure is turned down from 14 psi to 10 psi\n> [Usually\n> >>>> during space walks], the radio will also run hotter at 10 psi, than\n> at 14 psi.\n> >>>>\n> >>>> Maximum number of ISS-transmitted images per hour.\n> >>>> 1 image every 5 minutes or 20 per hour. And depending on heatsink\n> >>>> temperature and cooling fan status, we may need to reduce the\n> >>>> number of pictures per hour to keep the radio cool.\n> >>>>\n> >>>>\n> >>>> My goal is to expand the presence of Amateur Radio on ISS and other\n> >>>> satellites and the best tools we have on ISS today is Slow Scan TV.\n> >>>> Let's generate some worldwide excitement and make this hobby grow.\n> >>>>\n> >>>> Turn off APRS!\n> >>>>\n> >>>> Turn ON SSTV for a FULL 6 consecutive months in a row 24 hours a day,\n> 7-days a week.\n> >>>>\n> >>>> And then start watch the publicly generated by Marex SPACE-CAM1\n> >>>>\n> >>>> by Miles, WF1F\n> >>>\n> >>>\n> >>> -----------------------------------------------------------\n> >>>\n> >>> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum\n> available\n> >>> to all interested persons worldwide without requiring membership.\n> Opinions expressed\n> >>> are solely those of the author, and do not reflect the official views\n> of AMSAT-NA.\n> >>> Acceptable Use and Privacy Policies available at\n> https://www.amsat.org/about-amsat/\n> >>>\n> >>> View archives of this mailing list at\n> >>> https://mailman.amsat.org/hyperkitty/list/[email protected]\n> >>> To unsubscribe send an email to amsat-bb-leave(a)amsat.org\n> >>> Manage all of your AMSAT-NA mailing list preferences at\n> https://mailman.amsat.org\n> >\n> > -----------------------------------------------------------\n> >\n> > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available\n> > to all interested persons worldwide without requiring membership.\n> Opinions expressed\n> > are solely those of the author, and do not reflect the official views of\n> AMSAT-NA.\n> > Acceptable Use and Privacy Policies available at\n> https://www.amsat.org/about-amsat/\n> >\n> > View archives of this mailing list at\n> > https://mailman.amsat.org/hyperkitty/list/[email protected]\n> > To unsubscribe send an email to amsat-bb-leave(a)amsat.org\n> > Manage all of your AMSAT-NA mailing list preferences at\n> https://mailman.amsat.org\n>\n>\n\n\n", "attachments": [ { "email": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/D4T45WMGB3VB2NA3DOIVY4N3K2HN2RGF/?format=api", "counter": 2, "name": "attachment.html", "content_type": "text/html", "encoding": "utf-8", "size": 9762, "download": "https://mailman.amsat.org/hyperkitty/list/[email protected]/message/D4T45WMGB3VB2NA3DOIVY4N3K2HN2RGF/attachment/2/attachment.html" } ] }