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<div class="moz-cite-prefix">Mr, APRS,</div>
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<div class="moz-cite-prefix">Have you heard of this one? <a
href="https://github.com/DL7AD/pecanpico9">https://github.com/DL7AD/pecanpico9</a></div>
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<blockquote type="cite"><span style="color: rgb(36, 41, 46);
font-family: -apple-system, BlinkMacSystemFont, "Segoe
UI", Helvetica, Arial, sans-serif, "Apple Color
Emoji", "Segoe UI Emoji"; font-size: 16px;
font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial; display: inline
!important; float: none;">Other than usual position tracker,
this tracker has also the ability to take pictures with a
camera and send them to the ground. The tracker can use
RTTY/SSDV to transmit those to the ground. While RTTY can only
be received directly, this tracker can also use APRS/SSDV.
Therefore SSDV has been integraded into the APRS protocol.
This new protocol allows the user to receive pcitures by using
their APRS receiver and a computer. There is no tuning
required, so everything could work autonomously. APRS has been
integrated for the image transmission in respect to be used on
the global APRS network itself. So images can be received from
far away using the Igating service. Image packets may be
received somewhere else by Igates and relayed through the
internet. The APRS image transmission could be also used to
make use of 9k6 APRS. 9k6 APRS transmits the images very fast.
VGA sized pictures can be transmitted within minute. While the
protocol doesn't change, using this technique doesn't need any
changes rather than the decoding equipment.</span></blockquote>
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<div class="moz-cite-prefix">I've been trying to get a round to
implementing this protocol into my APRS clients.</div>
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<div class="moz-cite-prefix">And if the operators have the radio/PC
interface to receive SSTV, they can certainly install DireWolf and
an APRS client to receive and decode APRS. Or just tap into the
APRS-IS, if conditions permit.</div>
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<div class="moz-cite-prefix">Or look into NBEMS which can do file
transfers over repeaters at a reasonable speed. Our local club
had training on this and were using it to send small files over
the repeater at the end of our weekly check-in nets. NBEMS is
nice because it can be accomplished with acoustical coupling.
Just hold the radio near the PC microphone (or vice versa to
transmit) and boom, file is received (or transmitted). NBEMS also
includes error correction and all-or-nothing reception
indication. If using NBEMS, I'd suggest sending one picture per
page of the PPT just to make the retries quicker.</div>
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<p>Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and
Win32 <br>
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<p>PS. Here's a sample picture from the PECAN tracker:</p>
<p><img
src="https://github.com/DL7AD/pecanpico9/raw/master/train_station.jpg"
alt="Train station"></p>
<p><img
src="https://github.com/DL7AD/pecanpico9/raw/master/airport_tempelhof.jpg"
alt="Airport Berlin Tempelhof"></p>
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<div class="moz-cite-prefix">On 5/4/2020 12:45 PM, Robert Bruninga
wrote:<br>
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<div>The local radio club wants to move to on-line
technical talks but got bogged down in arguments over
teleconferingin protocols and security..<br>
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I's like to transmit my presentation as SSTV FAST mode (13
seconds per slide) and give the talk on the local
repeater. The FAST FM mode premiered in the (decades
ahead of its time) Kenwood VC-H1 And generally has to
connect to the modulator and discriminator and not the
voice circuits.<br>
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Has anyone used FAST FM mode for SSTV? Can it be received
by most folks without having to get to the discriminator for
receive?<br>
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I'm thinking of transmitting the image on the UHFrepeater
and the "talk" on the VHF colocated club repeater.<br>
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This would be a great way to do ham club meetings duging
COVID, bad weather, etc.<br>
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<div> In fact a great end-use software could be developed so
that at the prescribed time, the entire Power Point
presentation could be transmitted continuously, and be
assembled on receipt and then Viewed at the presenters speed.
This would not introduce 13 second per slide delays, but could
in fact, send the entire 50 slide PPT presentation in 10
minutes prior to the scheduled talk. <br>
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<div>And for near real time, the slide transmission need only
begin say 1 minute early and still be able to remain ahead of
the presentation speed.<br>
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<div>Ham Radio should have this toolbox! (probably already does
and i missed it)<br>
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<div>The most important thing is that the images should be able
to be received by almsot any radio and any SSTV software on
hand... thought not the advanced features.<br>
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<div>Comments and experiences welcome...<br>
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Bob, WB4aPR<br>
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