Date   
Whip out those whips and eggbeaters...

Michael Callaham
 

...antennas, that is--to listen for Amateur Radio aboard International
Space Station (ARISS) Automatic Packet Reporting System (APRS)
transmitted signals on 145.825 MHz FM. My GNOME Predict software
predicts a low pass starting 19:24:00 UTC (3:24 pm EDT) and lasting 8
minutes and 36 seconds, then a higher pass, reaching 71 degrees
elevation, starting 20:59:01 UTC (4:59:01 pm EDT), rising at an azimuth
of 235.02 degrees and setting at an azimuth of 50.27 degrees at 21:09:43
UTC (5:09:43 pm EDT).

You may view recent ARISS APRS signals that have been received on Earth
and gatewayed to the Internet at <http://ariss.net>.

Then set your alarm device to tune into the 145.47 MHz repeater at 7 pm
to hear Amateur Radio Newsline, and, when it ends, to check into the
Arlington County Net.

73,
--NW3V
--
Science matters. Matter matters.
Energy matters, including dark energy.

Re: ARISS APRS operating again

Paul Wilson KI4PW
 
Edited

Thanks, Mike. I use n2yo.net and get alerts on my phone and via email regarding upcoming ISS passes.

A couple of other items if using an HT: note the azimuth indications for the pass and make sure your body is not shielding the radio. Last night's pass had a zenith of 58 degrees above the horizon, so if you're pointed the wrong way your body may block the signals. Also, holding the antenna in a horizontal position helps. I prefer the Yaesu FT60 with its manual squelch knob, rather than the Baofeng, which buries the squelch setting in a menu. Generally you want the squelch wide open. You'll hear the data packets interrupting the noise. If you want to know what APRS sounds like, tune your HT to 144.390 and you can hear terrestrial APRS digipeaters.

I'll keep a lookout for the next [good] pass and give it a try.

Paul / KI4PW

ARISS APRS operating again

Michael Callaham
 

After a long outage. the APRS (Automatic Position Reporting System)
aboard the International Space Station (ISS) is again operating, as may
be seen at <http://www.ariss.net/>.

On the Arlington County Net yesterday, I announced an imminent pass of
the ISS over Arlington starting 23:51:5 UTC (7:51:59 pm EDT) and lasting
10 minutes 49 seconds. This prediction was generated by my Debian
(debian dot org) package gpredict using Keplerian elements ("keps")
updated yesterday. However, two stations reported that they tried to
hear, but did not hear, the ISS APRS downlink.

This often happens when the ISS maneuvers (firing its engines) or docks
or undocks a supply or crew spacecraft (these actions change the mass
and the area, hence the drag, of the ISS, and hence the data on which
orbital predictions are based.) The lesson here is to be skeptical of
predictions and the data on which the predictions are based: are they
current?

Here are some links that may help:

<https://spaceflight.nasa.gov/realdata/sightings/SSapplications/Post/JavaSSOP/JavaSSOP.html>: a NASA-recommended Java application for predicting sighting opportunities for the space station, which are passes of the ISS when the ISS may be seen, if skies are clear. This does not predict all passes of the ISS when the ISS may be heard or contacted by Amateur Radio.

<https://spotthestation.nasa.gov/sightings/view.cfm?country=United_States&region=Virginia&city=Arlington>:
NASA's predictions of passes of the ISS over Arlington, at times when it
may be seen (if clouds do not intervene).

<http://gpredict.oz9aec.net/documents.php>: Documentation for the GNOME
Predict (gpredict) application I use on Debian (debian dot org). This
predicts all passes, visible or not.

Enuf for now.

73,
--nw3v







--
Science matters. Matter matters.
Energy matters, including dark energy.

Ham band digipeaters on the International Space Station

Paul Wilson KI4PW
 

There was so much good discussion and interesting topics raised at last night's meeting. I feel we could have gone on for hours.

Anyway, as a followup to the discussion about working the ISS digipeater:

There is a TNC (terminal node controller) available for less than $100 that will enable a smartphone to decode and encode APRS (AX.25) data via bluetooth. I have one. It works great with my FT60 with land-based APRS digipeaters, but I never thought about using it via the ISS. A smartphone app or tablet app would be ideal for most people, since I would think most operators are using portable antennas to track the ISS and can't be tethered to a desktop machine. I use an app called APRSDroid.

Here's the TNC I have:

http://www.mobilinkd.com/tnc2/

Here are a few links on ISS digipeater operations, but note the latest information (the third link) that the UHF digipeater on the ISS is not in service.

http://www.ariss.org/uploads/1/9/6/8/19681527/k9jkm_2012_symposium_ver2.pdf

https://www.amsat.org/wordpress/wp-content/uploads/2014/01/ISS_Packet_Operation_on_70cm-20161113.pdf

http://www.ariss.org/current-status-of-iss-stations.html (NB: "current" info was posted 4/17/2017--nearly a year ago)

I'm not very experienced with satellite ops. I have listened to a few analog voice satellite passes, using my Arrow VHF/UHF antenna with the built-in duplexer. With CHIRP it's pretty easy to program my Yaesu FT60 or the Baofeng to operate on the uplink and downlink frequencies, and to program the five "pairs" to account for the Doppler shift during the pass.

Re: Le'me IN .... approval needs to be forthcoming? To change from moderated! K4ZB

 

Thank you Dr Z!
73 KC7TNU
THX GARY...


Mahalo! (Thank You!)

Gary Nobuo Niki, D.PSc
Diplomat of Pastoral Science
NAMA Certified Anger Management Specialist-I
Shamanic Samurai Medicine Man
@GaryNiki
202-905-0447 (Main W-DC)
202-241-0944 (VOICE MSG Phone)
602-327-3746 (Personal Mobile)
202-403-0499 (FAX)
nikido.com (Skype User Name)
http://www.linkedin.com/in/garyniki
NIKIDO International Ministry of Service & Good Finder I AM
https://about.me/GaryNiki





From: DrZ
Sent: Tuesday, March 20, 4:14 PM
Subject: [AARC-PUBLIC] Le'me IN .... approval needs to be forthcoming? To change from moderated! K4ZB
To: aarc-public@groups.io


-- Al Zodun / K4ZB

Links to items mentioned at tonight's meeting

Paul Wilson KI4PW
 

Some links for items discussed at the show-and-tell

The Heathkit virtual museum

http://www.heathkit-museum.com/hvmham.shtml

Dave's BITX transceiver kit

http://www.hfsignals.com

Dave's Silvertip vertical antenna, from KD4ADN

https://www.qrz.com/db/KJ4ADN/

Paul's Alexloop magnetic loop antenna

http://www.alexloop.com

Youkits antenna analyzer

https://www.youkits.com/collections/all

And last but not least, the Virginia QSO party

http://www.qsl.net/sterling/VA_QSO_Party/2018_VQP/2018_VQP_Main.html

73, KI4PW / Paul

Re: Le'me IN .... approval needs to be forthcoming? To change from moderated! K4ZB

Dave Shaw
 

Thank you.
I was waiting on approval.

Re: Le'me IN .... approval needs to be forthcoming? To change from moderated! K4ZB

 

‎Thank you Paul!
73 KC7TNU


Mahalo! (Thank You!)

Gary Nobuo Niki, D.PSc
Diplomat of Pastoral Science
NAMA Certified Anger Management Specialist-I
Shamanic Samurai Medicine Man
@GaryNiki
202-905-0447 (Main W-DC)
202-241-0944 (VOICE MSG Phone)
602-327-3746 (Personal Mobile)
202-403-0499 (FAX)
nikido.com (Skype User Name)
http://www.linkedin.com/in/garyniki
NIKIDO International Ministry of Service & Good Finder I AM


Original Message
From: Paul Wilson KI4PW
Sent: Tuesday, March 20, 2018 4:16 PM
To: AARC-PUBLIC@groups.io
Reply To: AARC-PUBLIC@groups.io
Subject: Re: [AARC-PUBLIC] Le'me IN .... approval needs to be forthcoming? To change from moderated! K4ZB


Al,

Everyone's first message is moderated, and un-moderated thereafter. It's a way to ward off spammers.

On March 20, 2018 at 4:08 PM DrZ <@DrZ1953> wrote:



--
Al Zodun / K4ZB


73, Paul, KI4PW

Re: Le'me IN .... approval needs to be forthcoming? To change from moderated! K4ZB

Paul Wilson KI4PW
 

Al,

Everyone's first message is moderated, and un-moderated thereafter. It's a way to ward off spammers.

On March 20, 2018 at 4:08 PM DrZ <@DrZ1953> wrote:



--
Al Zodun / K4ZB


73, Paul, KI4PW

Le'me IN .... approval needs to be forthcoming? To change from moderated! K4ZB

DrZ
 

--
Al Zodun / K4ZB

March Meeting Notice

Paul Wilson KI4PW
 

The March Meeting of the Arlington Amateur Radio Club will be held on March 20, 2018.
Location: St. Thomas More Cathedral School, 105 N. Thomas Street, near the intersection of Glebe Rd. and Arlington Blvd.
Time: 7pm
Talk-in: on the club's VHF repeater, 145.470 (-) 107.2 Hz PL tone.
Guests and visitors are welcome.
73, Paul WilsonKI4PW
Sent via the Samsung GALAXY S® 5, an AT&T 4G LTE smartphone

Re: Arlington County Net tonight 7 pm on 145.47(-) MHz

Paul Wilson KI4PW
 

You're reaching a truly elite audience: you and me.

73, KI4PW / Paul

On Mar 6, 2018, at 2:37 PM, Michael Callaham <vze32sw5@...> wrote:

Please join us tonight at 7 pm ET for the Arlington County Net on the
W4WVP repeater, 145.47 MHz, standard offset, PL tone 107.2 Hz required
for access. Amateur Radio Newsline report number 2105 will be
transmitted starting at 7 pm. When it ends, Net Control Station KC5QCN
will call for check-ins.

73,
--Mike nw3v, Net Co-Manager
--
Science matters. Matter matters.
Energy matters, including dark energy.



Arlington County Net tonight 7 pm on 145.47(-) MHz

Michael Callaham
 

Please join us tonight at 7 pm ET for the Arlington County Net on the
W4WVP repeater, 145.47 MHz, standard offset, PL tone 107.2 Hz required
for access. Amateur Radio Newsline report number 2105 will be
transmitted starting at 7 pm. When it ends, Net Control Station KC5QCN
will call for check-ins.

73,
--Mike nw3v, Net Co-Manager
--
Science matters. Matter matters.
Energy matters, including dark energy.

QSV

Michael Callaham
 

This is a test message. I will send a series of Vs. VVV VVV VVV.
--
Science matters. Matter matters.
Energy matters, including dark energy.