With the development of QIKCOM-2 APRS DTMF satellite*, we have found a way
to encode ANY ham call 3 character suffix into the 5 digit ANI codes of
all those cheap radios. And hence, we can use the ANI to place anyone on
the APRS map locally and globally. And knowing who is on the air when,
where and on what frequency is what APRS brings to Ham radio.
This project is part of the overall APRStt, TouchTone project to allow
anyone to use any radio for APRS contact and visibility. Especially the
cheap Chinese radios.
Here is how it works:
. User makes VOICE ID and his ANI goes out when he releases PTT
. Other repeater users do not hear the DTMF ANI because repeater output
is typically muted.
. APRS-ANI engine ($50 gizmo) at the repeater receiver decodes the ANI
. That repeater APRS-ANI engine has a list of all known callsigns (and
their suffix) in that area
. APRS-ANI engine responds with SPOKEN CALLSIGN (if needed) for feedback
. APRS-ANI engine sends out APRS packet on national APRS channel as
. It is from your full call like any other APRS packet
. It shows WHEN you keyed the radio (real time) and were on the air
. It includes the FREQUENCY and PL of the repeater
. It includes any ID or BRAG text associated with that repeater
. Your POSITION shows on every APRS radio locally and every map in the
world in a table near the repeater
And THAT is what APRS is all about. Facilitating human-to-human contact by
providing situational awareness of everything going on in Ham radio in the
What we need: We already have all the pieces needed to do this. We just
need to get organized to do it more efficiently. I have working models of
the APRS-ANI engine using just the DTMF chip and a Byonics TinyTrack4. But
here are some things that can help speed this along:
. Programming your ANI radio: Daniel KB3MUN has a good summary on these
. CALL/Suffix lists: Need a Smart parser that can take ANY club roster in
ANY format and output a simple list of nothing but callsigns in .TXT
format for the local ANI engine to use for suffix correlation to full
. Tweaking DTMF decoders (such as Byonics) to follow the high speed ANI
codes (hardware solution)
. All repeater developers to add this to their Controllers! (software
And this is just the beginning of what we can do with DTMF and APRS. See
1. Based upon the AMSAT page, I conclude the following birds are
active: ISS (FM), LILACSAT-2, AO-73, AO-85, SO-50, NO-44, NO-84, FO-29,
2. At the top of the AMSAT satellite status page, there is a blank line
for satellite status, with reports. Is this a new satellite that is not yet
turned over to operations?
3. Which of the following satellites will work when NOT illuminated? I
remember AO-7 and NO-44 won't, and AO-73 will, but not sure about SO-50,
FO-29, NO-84, AO-85, XW-2F.
4. What is the best way to tell if a satellite is illuminated? Could
be before sunrise at my QTH if the bird is east, or after my sunset if the
bird is west. How can I tell?
5. I need more info on APRS. I set it up to relay my position from my
car on 144.39 many years ago, but Bob Bruninga has often said APRS capable
of so much more.
a. Is satellite APRS helpful just for isolated locations, for relaying
b. How long does the satellite transmit the information packet (what is
the lifetime of the packet?)
c. What if the amount of packets to be transmitted by the satellite
takes longer than the visibility of the satellite at my QTH? I won't hear
certain data, right?
d. What is everyone else using satellite APRS for?
Mark Lunday, WD4ELG
Greensboro, NC FM06be
I can hear a WA2, but not my own CW signal on the downlink.
Using an Elk for uplink. IC910H. Power at 50%, azimuth only 20 degrees
from center of the Elk.
Just to confirm, uplink center band is 435.140, downlink center band is
Mark Lunday, WD4ELG
Greensboro, NC FM06be
Just got this.
On 25 November 2015 at approximately 0816z, [multiple objects] were detected
in the vicinity of NOAA 16 (#26536), which may indicate a breakup of the
non-operational satellite. As of 1830z, 19 associated objects have been
cataloged... More pieces may be cataloged as analysis continues...
Just a reminder how messy it is up there.
Please join us in listening to the ISS contact with participants at
*Dragonskolan, Umeå, Sweden* on Friday December 4. AOS is anticipated at
The duration of the contact is approximately 9 minutes and 30 seconds. The
contact will be a telebridge between NA1SS and LU1CGB in Argentina. The
contact is expected to be conducted in English.
NOTE: Contact is dependent on outcome of the Cygnus launch scheduled for
Thursday December 3. If Launch is successful this contact is a go. If the
launch fails this contact will be rescheduled for another date due to time
Dragonskolan is one of the biggest upper secondary schools in Sweden and is
located in central Umeå. Currently hosting 1820 students aged 16-19 and 300
staff; it has recently been renovated to meet modern needs in a stimulating
Audio from this contact will be fed into the:
EchoLink *AMSAT* (101377) Server
Streaming Audio at: https://sites.google.com/site/arissaudio/
Audio on Echolink & web stream is generally transmitted around 20 minutes
prior to the contact taking place so that you can hear some of the
preparation that occurs.
** Contact times are approximate. If the ISS executes a reboost or other
manoeuvre, the AOS (Acquisition Of Signal) time may alter by a few minutes
John - AG9D
ARISS Audio Distribution Team
For those in Europe, on AO-73 pass starting today at 22:04 UTC, CU7BC in
HM58qm will be active.
I'm "training" him on the job, but go ahead and give him a call if you
hear us chatting.
73 de Pedro CU2ZG
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Since AO-85 was launched in October, I have been testing different HTs to
see which ones can work this satellite full-duplex and writing about those
tests here on the AMSAT-BB list. Other than the ISS U/V cross-band
repeater, it has been a long time since we have had a U/V FM satellite
(going back to SO-35 in 1999-2001). To make it easier to reference my
posts, I'm listing the links to them in the AMSAT-BB archive here...
For the Wouxun KG-UV9D, I posted my first comments about using that on
AO-85 early on the Saturday (10 October) following the launch:
After additional testing, I wrote more about this radio last week (Monday,
I first wrote about the Wouxun KG-UV8D with AO-85 on the Sunday (11
October) following the launch:
and after additional tests, a post late last Saturday (28 November)
I briefly wrote about the AnyTone TERMN-8R just before the AMSAT
Symposium, on 12 October:
and wrote more about it after testing it last Thursday (26 November)
I tried a Puxing PX-UV973 last Friday (27 November), and wrote a report
about it that morning:
Not that it really needed to be tested against AO-85, I tried my Kenwood
TH-D72A HT the same Friday I had tried the PX-UV973. I posted a report
about it late that evening:
None of these reports include the occasions I varied the transmit power
from my Icom IC-2820H 2m/70cm FM mobile radio among its 3 levels (5, 15,
and 50W) when working AO-85. With all of these radios, my original comments
about the KG-UV9D and being able to work AO-85 when the satellite was above
20 degrees elevation appear to be true for all of these radios when used at
the 5-watt transmit power level.
I still plan on finding my IC-W32A and DJ-G7T to try with this satellite,
as well as trying two-radio combinations. As I try other radios, I'll post
my findings here. If anyone else is trying different radios with AO-85,
especially HTs (or other radios with low transmitter power levels), please
post your findings to this list. The AMSAT-BB archives are open to the
public, and searchable via search engines.
Here is another opportunity to view a web streamed launch video on the
evening of December 1 USA time. The European Space Agency's LISA Pathfinder
technology demonstrator will be launched by Arianespace on a Vega rocket
from the Guiana Space Center in Kourou, French Guiana.
The launch is planned for 04:15:00, December 2 UTC. This will be the evening
of December 1 USA time. Video coverage begins 20 minutes prior to launch at
http://www.arianespace.tv/ then click the 'Follow next launch' link.
73 de JoAnne K9JKM
I was thrilled to make my first contact (with W4CLJ) on the 00:35 z
LilacSat-2 pass this evening. Lots of odd tones, and it sounded at times
that someone was keying without speaking, but I still was able to get
I used an HT and Arrow 2 antenna. Unlike AO-85, there wasn't much activity
on the sat, I heard just one other station (NP4?? DM41), but couldn't make
Good ol' SO-50 is still the easiest of the easy-sats for me to work with my
I'll be installing new SFH-Elektronik preamps along with Bias-T's to run
DC along the coax. I'd like to feed each preamp with one power supply,
but I was wondering if this may cause RFI issues? The power supply for
the preamps will be separate from the rigs power supply.