[aprssig] APRS Email from Space! (ET Phone Home)

Robert Bruninga bruninga at usna.edu
Sun Jun 30 10:52:13 EDT 2019


Thanks for the correction.  I guess I did add a line number on it.
Sorry, I guess I forgot about that.


On Sun, Jun 30, 2019 at 9:49 AM Pete Loveall AE5PL Lists via aprssig <
aprssig at lists.tapr.org> wrote:

> Bob, it is not using an unnumbered format, contrary to your statement:
> PSAT2-1>APOFF,ARISS,qAR,VK6HAM-2::EMAIL    :changed.to at prevent.spam PSAT2
> reporting Home [004960,0I801]{019
> If you did not ignore my objections, then why did you try to promote it
> here last night?  Even if the server for EMAIL was on the air, using a
> numbered message as a broadcast message is not how the servers function and
> your original post was stating it is "exciting" to misuse that server
> (numbered messages as broadcast email generators).  That is what I object
> to and the blatant promotion of trying to misuse the EMAIL servers when
> they are trying to perform bidirectional communications per the spec and
> you are promoting "spoofing" them into sending email without bidirectional
> communications.  What your stated original intent was in 1990 to simply
> provide line numbering is not what is in the spec so let's not try to break
> everything that has been written since the spec because you didn't think it
> through 2 years ago...
> I appreciate your continued development of satellites and other amateur
> radio projects that require a huge amount of effort.  After I expressed to
> you privately the issues involved with trying to do this and requested that
> you focus on telemetry collection using telemetry packets and I also stated
> that generating an email using your own server based on that data
> collection is the modern way to go that does not go against the intent of
> the email servers, the APRS numbered message protocol, and unidirectional
> SATGATE functionality, you ceased communication and failed to indicate that
> the Sprouls had taken down their server.  Even if I get one of the sysops
> who expressed interest in setting up a replacement server, it still would
> not support your PSAT messages (for other reasons which I also told you
> about).
> My recommendation to you: if your PSAT message is hard coded and cannot be
> disabled or changed, I recommend one of your computer experts write some
> simple code to connect read-only to an APRS-IS server-side filter port
> (port 14580), set a filter of b/PSAT2*, and have that code send you an
> email when it sees the message from PSAT2 (plus you can easily collect all
> the telemetry data and any other packets being generated by the satellite
> with that code).  I recommend you approach it this way instead of trying to
> get someone to set up a server without knowledge of the ramifications of
> what it means to setup such a server.
> Again, I appreciate your extensive and exhaustive efforts in supporting
> these projects.  I just wish you would promote the good things. Leave the
> things that go against the spec or other intended purposes of independently
> provided services rest.
> 73,
> Pete Loveall AE5PL
> pete at ae5pl dot net
> -----Original Message-----
> From: aprssig <aprssig-bounces at lists.tapr.org> On Behalf Of Robert
> Bruninga
> Sent: Sunday, June 30, 2019 7:55 AM
> To: TAPR APRS Mailing List <aprssig at lists.tapr.org>
> Subject: Re: [aprssig] APRS Email from Space! (ET Phone Home)
> As I explained before, when Pete raised his objection back in March, it
> was already after PSAT2 had gone through software certification and was
> less than a month to delivery when it is impossible to change flight
> software after all space qualification testing has completed.
> Then two years of incremental launch delays just one or two months at a
> time brings us to here.  In March I contacted you to let you know that the
> Sproul Brothers had agreed to release the original "EMAIL" address and I
> asked if you wanted to support it (in addition to your EMAIL2 engine).
> I wanted to make sure an "EMAIL" engine existed because that was what was
> already programmed into PSAT2 and could not be changed.
> When you objected to my experiment, it was too late and there was nothing
> I could do to change the experiment.   So do not think that I simply
> ignored your objections.  It was just too late and I had enough other
> things that urgently needed attention and so no need to keep arguing.
> The main APRS value is being a one-to-all packet distribution system.  But
> with one exception, messages.  And so the APRS design included the ability
> to send one-to-one messages as well to cut down on unnecessary "broadcast"
> when there was a single intended recepient.  It also included an optional
> line number in case the sender wanted to get an ACK.
> PSAT2 uses an un-numbered APRS message format to send me an EMAIL status
> once a day so that I can be aware of its status wherever I can receive
> email.  It depends on a working "EMAIL" engine to pull that status report
> from the APRS-IS and forward it to my email address.
> Bob, Wb4APR
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