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GET /hyperkitty/api/list/[email protected]/email/UEH3XAJ5LBRVIFOGBPFBQWHIRKTYJ6PZ/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UEH3XAJ5LBRVIFOGBPFBQWHIRKTYJ6PZ/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "CABsMmtSfH-_dpCjOftpj=_uUHYqf0OfG0i7QBv1iJMN_fKJr-Q@mail.gmail.com", "message_id_hash": "UEH3XAJ5LBRVIFOGBPFBQWHIRKTYJ6PZ", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/K746F5JRXVIZQCXVE637KQZB6T4XJOG7/?format=api", "sender": { "address": "johnnykludt (a) gmail.com", "mailman_id": "1052971820fa4c30a2a6e76a33ee243f", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/1052971820fa4c30a2a6e76a33ee243f/emails/?format=api" }, "sender_name": "John Kludt", "subject": "Re: [amsat-bb] Space Center Abandoned Dish Rehabilitation -\tOutreach #1", "date": "2019-08-14T22:34:43Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/47DPJJYESNC7JQU2PE5XR3VTYX6MJPBS/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KENBPM2F7EB5E4QIQJMRRX5FMBVSY3JM/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Robert,\n\nNot that it is something we could fix but really like this site:\n\nhttps://eyes.nasa.gov/dsn/dsn.html\n\nIt lets you real time observe what Canberra, Madrid and Goldstone are\ndoing. Fascinating to watch.\n\nI don't recall the name of the site in North Carolina that has the\nrejuvenated dishes. But a ham friend of mine took a tour and it is pretty\ncool stuff. Unfortunately they are not much used because according to them\nthese old dishes are very expensive to operate. Must be kind of like\nbuying a horse - the real money gets spent not when you buy the horse but\nover the next twenty years as you pay to maintain the trusty steed!\n\nJohn\n\nOn Wed, Aug 14, 2019 at 6:22 PM Robert MacHale via AMSAT-BB <\[email protected]> wrote:\n\n> Wow! Fun project. Very exciting.\n> Any chance there are also antique antennas at the California ground\n> station at Goldstone. Nasa had three primary ground stations for Apollo:\n> Spain, Australia, and California.\n> https://www.gdscc.nasa.gov/\n>\n> 73\n> Robert MacHale. KE6BLR Ham Radio License.\n> http://spaceCommunicator.club/aprs\n> . Supporting Boy Scout Merit Badges in Radio, Robotics, and Space\n> Exploration\n>\n>\n>\n> On Wednesday, August 14, 2019, 2:54:16 PM PDT, Daniel Cussen via\n> AMSAT-BB <[email protected]> wrote:\n>\n> I would recommend trying to find out if the motors are AC or DC or some\n> weird voltage or stepper or servo type. If you can get the motors to move,\n> position feedback could be added with a simple potentiometer from a belt,\n> or a fancy encoder. It may be possible to use the old position feedback,\n> but it may be faster and easier to mount something on the outside that\n> gives the same result.\n>\n> In terms of frequency ranges, rate of tracking, dish beam width, these\n> will determine what it could be used for, and assuming you use the old\n> motors and the reflector on the dish is designed for vhf?, then this would\n> limit top frequency and maximum tracking ability aligned with beam width.\n> Say vhf, UHF lower microwave, and presumably the dish could track low earth\n> orbit or moon bounce.\n>\n> Looking at the photos it looks like the right middle connector is an n type\n> coax connector for the feed. I assume the military type connectors are for\n> position feedback from some sort of rotary or absolute encoder. Often there\n> is an encoder mounted near or on the motor, which is AC or DC simple motor.\n>\n> If the manual movement cranks work you could run belts to them and mount\n> new motors on the outside. Speed might be limited, but acceptable.\n>\n> I would recommend adding hardware limit switches no matter what you do to\n> ensure the dish can never rotate too far and damage itself. It may have\n> limit switches inside, but they may need replacing and external switches\n> would be easier to service.\n>\n> It would be great if this could track low earth orbit and receive school\n> contacts from the iss and cubesats on vhf and UHF.\n>\n> I would like to see it receive 2395MHz Hamtv from the ISS, which is\n> relatively strong and easy to receive.\n>\n>\n> On Wed, 14 Aug 2019 22:11 Michelle Thompson via AMSAT-BB <\n> [email protected]\n> wrote:\n>\n> > A group of GNU Radio community members has permission to evaluate a dish\n> > installation in Huntsville, AL near the Space Center. If you've ever been\n> > to the Space Center (where the Saturn V is suspended from the ceiling)\n> then\n> > this dish is right outside the main entrance. Anyone attending Symposium\n> > last year should recognize it!\n> >\n> > Here's a set of photos:\n> >\n> >\n> >\n> https://drive.google.com/drive/u/0/folders/1d_Oi3hrIi49JxmaoNuUA-pvUXOs7vSz1\n> >\n> > We're looking for technical information, identification of what you\n> > recognize in the photos, recommended next steps, and what to watch out\n> for,\n> > prioritize, or avoid. We already know we want to take the paint off all\n> the\n> > ID plates and see what's under there.\n> >\n> > We want to see if we can get this working for *amateur radio operators to\n> > access over the internet*, ideally with a GNU Radio flowgraph to control\n> it\n> > from an SDR. Our priority is to make this work for amateur satellite.\n> >\n> > This type of setup is similar to what GNU Radio Foundation is working on\n> > with the Allen Telescope Array. We have the go-ahead from the Space\n> Center\n> > curator to do this study and make recommendations.\n> >\n> > I have fully restored several basket-case British sports cars and then\n> > successfully raced them. My other team members have restored things even\n> > more challenging. We are not dumb, naive, or easily deterred. We know\n> this\n> > may turn out to be something that requires way more work than we can do\n> in\n> > any time frame we can manage. Documenting that is still of great value,\n> and\n> > that is why we are asking for your help. Right now, no one knows much of\n> > anything about it. This sort of installation, if available for amateur\n> > radio, is well worth the effort.\n> >\n> > Some of the people involved have been driving past this installation for\n> 20\n> > years and want to see it back in service at whatever level we can\n> achieve.\n> > It will be discussed at GNU Radio Conference, and everyone at the\n> > conference will have the opportunity to see it up close and in person,\n> > since it's literally across the parking lot from the venue.\n> >\n> > Want to attend or find out more about GRCon?\n> > https://www.gnuradio.org/grcon/grcon19/\n> >\n> > If you know of someone off-list that might know details that will help,\n> > then please pass this along!\n> >\n> > -Michelle W5NYV + Corps of Operation Flashlight\n> > _______________________________________________\n> > Sent via [email protected]. AMSAT-NA makes this open forum available\n> > to all interested persons worldwide without requiring membership.\n> Opinions\n> > expressed\n> > are solely those of the author, and do not reflect the official views of\n> > AMSAT-NA.\n> > Not an AMSAT-NA member? Join now to support the amateur satellite\n> program!\n> > Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n> >\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions\n> expressed\n> are solely those of the author, and do not reflect the official views of\n> AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n>\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions\n> expressed\n> are solely those of the author, and do not reflect the official views of\n> AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n>\n", "attachments": [] }