Have updated my CNCTRK site with information on the Raspberry Pi version of
the system -- these data are new since the article was published in the
May/June issue of the Journal.
Am still planning to build a short run of APS units in Q4 (if our travel
expenses son't break the bank, that is).
Have fun and keep up the good work.
I know most of the AMSAT operation is done by volunteers. I also have
wondered why some posts for satellite passes seem to be very close or even
after the pass occurred. What is the average time between someone sending a
post and when it actually appears on the BB? I sent a congratulatory
message to the AMSAT team who produce the Journal as well as commenting on
the content. I also mentioned getting my AMSAT Journal in the mail today to
allow members to know it will be arriving soon. That post was sent at 2:46
PM EDT today.I BCC it to myself. It showed up in 5 seconds. Five hours
later, I still do not see it listed on the AMSAT BB. I can see why some
posts seem to be at the last minute before something happens that may be of
interest to most of us. I'm not complaining, I just wonder if we need to
post about 12 hours before something will actually happen.
Sent from Rick's gmail account
I receive a daily digest, but other than checking the archives, is there
any real-time or near-real-time way to
see new bb messages?
>* I BCC it to myself. It showed up in 5 seconds. Five hours
*>* later, I still do not see it listed on the AMSAT BB.
OK, EMike rang a bell :-) The list won't duplicate messages. The settings
assumed you already received the message with your BCC. Try it without the
BCC on your next message and you should see your messages shortly afterward.
There is a Mailman setting for NODUP for all subscribers.
The timing of the message actually appearing for you also depends on local
settings. I use MS-Office Outlook for my primary e-mail. My Outlook settings
are to check for new mail every 300 seconds (5 minutes). So a message
actually arriving would be sometime in that 5 minute window depending on the
time in the receive window when I sent the message.
I use Gmail on my Android tablet and it usually receives messages sooner
mostly because it is not likely waiting for the 5 minute receive window as
in my Outlook settings.
73 de JoAnne K9JKMk9jkm at amsat.org
AMSAT VP User Services
1:Fm PSAT-1 To APOFF Via ARISS <UI R Pid=F0 Len=50> [10:45:05R]
!08 . N\058 . ES140/999/W3ADO s#014548,0z290
Mercedes ( Buenos Aires ) Argentina
El software de antivirus Avast ha analizado este correo electrónico en busca de virus.
I put together an experimental program called DopplerPSK to compensate for the Doppler shift on the NO-84 (or NO-83) PSK31 uplink. In essence, its a PSK31 transmitter that is merged with an orbital propagator to cause your transmitted signal to drift exactly opposite to uplink Doppler effect. It does this in a phase-continuous correction so that you don't get errors due to discontinuous frequency adjustments from controlling a radio in discrete steps.
In the case of PSAT and BricSat, it should cause your signal to stay at constant frequency in the satellite's uplink receiver, and thus you should get a stable frequency on the FM downlink as well. In turn, this means you should be able to use your favorite PSK31 demodulating software to copy the downlink since the frequency drift should stay well within the AFC tolerance of the software.
Anyway, if there are any adventurous people who are set up to give this a go, I would be interested in seeing if it actually works.
You can find a rough quick-start guide (which contains an explanation of how it works and what you need to get started) and the application package on the rather minimalist page here:
It's an experiment, so be prepared for disappointment. I am :-)
I have been very bad at making satellite contacts recently. The main reason is because they aren't at a specific time every day/week and I don't look for passes very often. When I do search for passes, I am busy during the pass or don't have enough time to prep for a pass in 10 minutes. In addition, I can only work FM, so there aren't many sats (like one)
Has anybody ever found something to get notified when a pass is coming up (maybe in the next few hours or so) via text message or email or something else?
2015 ARRL/TAPR DCC (Digital Communications Conference)
DoubleTree HotelArlington Heights, IL
October 9 - 11, 2015
The Digital Communication Conference is the premiere annual Digital Conference covering all Digital Modes & Techniques including Data, Voice & Television and SDR.
The DCC has two full days of Technical presentations on Friday & Saturday, concurrent Introductory forums on Saturday,
a Saturday night Banquet with a Guest Speaker and a Sunday morning Seminar deep dive into a technical subject.
There are also Friday & Saturday Lunches and a Friday Night Social.
Those who have submitted a Technical Paper to be included in the Conference Proceedings have priority to present a presentation during the Technical Forums, however if you didn't submit a technical paper and want to present a Technical or Introductory presentation please contact the TAPR Office at: https://www.tapr.org/inforequest.php
The 2015 DCC will be held at the DoubleTree Hotel in Chicago northwest suburb of Arlington Heights not far from O'Hare airport with a free hotel shuttle to O'Hare.
Be sure to register for the DCC and reserve your hotel room early.
The DCC Early Bird Pre-Registration Discount ends on September 19th.
DCC Registration is available at: http://www.tapr.org/dcc#registration
The DCC Hotel Special Rate ends on September 15th. DCC Hotel Information is available at: http://www.tapr.org/dcc#hotel
Look forward to your participation in the DCC.
My wife and I will be taking 5 days to drive a rental truck from DFW, North
Texas to Boston to move daughter and new husband's stuff to their new home
and law school. The type of truck and the logistics of the trip will not
really work with casual satellite ops. Maybe someday.
However, I would love to make terrestrial QSOs with some of you folks along
the way as I will have a dual bander and a small antenna mounted to the
truck. Would love to say hi on local repeaters along the way.
Here is the route and rough projected time table.
Friday, August 28th, Afternoon-evening. Dallas, Texarkana, Little Rock.
Saturday, August 29th, Little Rock, Memphis, Nashville, Elizabethtown, KY,
Sunday, August 30th, Springfield, KY, Lexington, KY, Cincinnati, Columbus,
Monday, August 31st, Erie, Buffalo, Rochester, Syracuse, Schenectady.
Tuesday, September 1st Albany Springfield, Boston.
There might be some schedule flex, especially the last two days but that
should be close. Contact me off list via my n5hyp(a)yahoo.com email with
Callsign, city, repeater/s PL and other pertinent information.
Perhaps we can exchange more than just a Grid Square. What a concept.
73 de N5HYP
Did anyone record this pass? Hope worked a few stations from the beach in EL98 and there was an XE1 station that she worked at the end of the pass. The recording is covered up by someone on the beach coming up and asking what she was doing. I can’t make out the callsign.
Thanks for everyone who bears with all of the kids as they learn how to be good operators! This pass was a great learning experience to explain how some people are lids and that it is illegal to key up your mic and whistle on the radio. The youngest wonders why someone would spend so much money and time to make a satellite station and then just try to jam people. She is very observant.
James - WX4TV
I posted a little too soon about my rotator "blog" on Friday - I've
since cleaned up the post and added some high resolution pics (plus a
short video). If you'd like to take another boo here's the link again:
It would be great to get some comments and thoughts (critical ones
welcome!) in the Pi forum.
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