<div dir="ltr">On Mon, Aug 7, 2017 at 10:21 PM, Robert Bruninga <span dir="ltr"><<a href="mailto:bruninga@usna.edu" target="_blank">bruninga@usna.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class="gmail-"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)">>> If we bgine using #J overlays for APRS-IS satelite ground stations, what conflicts will arise?<br></blockquote><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)">> I can only repeat things I have said before about other proposals to identify function based on symbols.<br><br>> 1. Each station only gets one symbol. If a station has more than one function it has no choice but to not send one of the symbols, and it takes away the personalization option that has always been attractive to hams participating in APRS.<br><br></blockquote></span><div>I'd say each Radio only gets one symbol, and these permanent gound station radios listening on 145.825 as satellite grouind stations are only doing a single function. And they are not on 144.39 where their other station symbols might be.</div></div></div></div></blockquote><div><br></div><div>What if they're a university station with only an omni? What if they're non-optimum sky view on the UHF downlink? I think Steve's complaint is that you're trying to encode three different things in the symbol overlay. If we're going to come up with a way to encode all of this information for "various" sat-gates anyways, why not only use that and let the symbol be used for something else?</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class="gmail-"><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)">> 2. You will never get great compliance with anything that is user-configurable, especially if it involves station identity. Even if #1 were not a problem there will always be people that will not do it correctly.<br></blockquote><div><br></div></span><div>But no reason not to have a standard for those that want to make it an identifiable network.</div></div></div></div></blockquote><div><br></div><div>I thought the satellite guys were going to set up their own APRS-IS network with different dedup semantics so they could get their vanity satellite bounce online even if they were near another sat-gate. What ever happened to that project? Attaching to a specific set of APRS-IS servers seems like a much more effective way to filter the network than to try and pattern match stations by *any* metric suggested.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class="gmail-"><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)">> 3. Even if 1 and 2 aren't a problem, you only get those who intend to be satellite gates, not those who actually meet equipment, performance, and configuration requirements.<br></blockquote><div><br></div></span><div>Thats exaclty what we want. We want them to self identify and there are multiple overlays so each Satgate station can identiy their category and so one-size does not have to fit all. </div></div></div></div></blockquote><div><br></div><div>But self-identification has proven to be of low quality. I think Steve is suggesting that we should be coming up with more robust ways to identify stations than them setting certain symbols, which they have every right to do for any other APRS application since we never told them *not* to use these symbols for anything else.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class="gmail-"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)"><br>It is easy to identify those people who function as satellite gateways using the path of packets. Creating a database from the actual data will catch those who actually function as satgates without needing any extra compliance from the operators.<br></blockquote><div><br></div></span><div>Yes, but two problems. First you need a symbol to be able to do an easy sort-by-symbol map which is usually the first-order view of APRS information. You cannot sort a map based on the QAR construct. And second not all of the 330 stations that actually IGated are the permanet core satgatges we are interested in. See below.</div></div></div></div></blockquote><div><br></div><div>But all the I-gates which were set to 145.825 for a pass and their symbol changed to "S&", then changed back to 144.390 are core sat-gates which we're interested in? The "S&" special event I-gates that someone set up and then forgot about are sat-gates we're interested in?</div><div><br></div><div>What problem are we trying to solve that isn't better fixed by someone curating a list of known good sat-gates? We think there's only a few dozen of them, so it wouldn't even be that much effort.</div><div><br></div><div>What value are we offering to current sat-gate operators to encourage them to go dig into their sat-gate configs to change their symbol from the satellite dish to an abstract black diamond with some letter on top of it?</div><div><br></div><div>--<br></div><div class="gmail_extra"><div><div class="gmail_signature">Kenneth Finnegan, W6KWF<br><a href="http://blog.thelifeofkenneth.com/" target="_blank">http://blog.thelifeofkenneth.com/</a></div></div>
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