I am hearing reports of RFI from these LED bulbs. Not just HF, but also
VHF.
If you can make any quantitative assessments of such RFI, please let me
know.
And the amazing thing is that at VHF you will never notice it because RFI
is noise power and it is noise power that keeps a squelch CLOSED.
Manuallly open the squelch and sometimes RFI will show full scale on the S
meter yet not open the squelch. And on my radios, when the squelch is
closed, the S meter is inactive and shows 0.
Bob Bruninga, WB4APR
The program can easily detect and fix the TLE preliminary data errors
for working in satellite programs after launching the satellite in orbit
The original version of the program released before launching Fox-1D
works in Windows-7 and higher. Version that works in Windows XP is now
added. The program name for Win-XP changes to TLEdoctor.
Both programs can be downloaded at http://oscar.ok2gz.eu/fox1d.php
73
Jarda ok2gz
---
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Hi folks,
AO73/FUNcube is now in amateur mode for the weekend with the transponder on!
Please see below for all FUNcube mission info
73s Graham G3VZV and the FUNcube team.
++++++++++++++++++++++++++++++++++
FUNcube frequencies and other details
++++++++++++++++++++++++++++++++++
AO-73 FUNcube-1
The transponder is normally operational only when the satellite is in
eclipse, ie the solar panels are NOT being illuminated. During weekends
(from pm Fridays UTC to PM Sundays UTC) the transponder is operational 24/7.
When the transponder is switched off, the telemetry beacon is on full power,
when the transponder is on the beacon it is on low power. During holidays,
eg Christmas, New Year, Easter, etc, the transponder maybe activated for
extended periods. Watch AMSAT-BB for announcements which are usually made on
Friday evenings (UTC)
The nominal transponder frequencies are:
Uplink: 435.150 - 435.130 MHz LSB (Inverting)
Downlink: 145.950 - 145.970 MHz USB
Telemetry Tx: 145.935 MHz BPSK
(The passband may be up to 15kHz higher depending on on-board temps. Lower
temperatures give higher freqs!)
FUNcube-2 (aka FUNcube on UKube)
The FUNcube-2 sub-system continues to operate autonomously and, almost
continuously, in amateur mode. The transponder is operational and the
telemetry downlink is functioning with about 70mW output. The FUNcube-1
Dashboard does not correctly display the telemetry but it does correctly
decode the data and uploads it to the FUNcube Data Warehouse from where it
can be examined. Most of the real time data channels are operational and
these include battery voltages, temperatures and ADCS data coming via the
main On Board Computer (OBC).
The transponder is interrupted for a few seconds every 2 minutes when the
other transmitter sends its CW beacon and, occasionally, for a few seconds
when the main OBC reboots (approx seven times each orbit).
The nominal transponder frequencies are:
Uplink: 435.080 - 435.060 MHz LSB (Inverting)
Downlink: 145.930 - 145.950 MHz USB
Telemetry Tx: 145.915 MHz BPSK
(The passband may be up to 10kHz higher depending on on-board temps. Low
temperatures give higher freqs!)
EO79 FUNcube-3
Due to power budget constraints the transponder cannot be operational 24/7
and an orbit specific schedule has been developed. The transponder will
commence operation 27 minutes after the spacecraft enters sunlight and will
stay on for a period of 25 minutes. This schedule may be modified in future
months as a result of experience.
The nominal transponder frequencies are:
Uplink: 435.0723-435.0473 MHz LSB (Inverting)
Downlink: 145.946-145.971 MHz USB
Further detailed info on EO79 transponder frequencies is at:
https://amsat-uk.org/2016/11/10/eo79-funcube-3-transponder-commences-regula…
EO88/Nayif-1/FUNcube-5
EO88 is presently operating in autonomous mode. The transponder is
operational when the satellite is in eclipse, ie the solar panels are NOT
being illuminated.
When the transponder is switched off, the telemetry beacon is on full power,
when the transponder is on the beacon it is on low power.
The transponder frequencies are:
Uplink: 435.045 – 435.015 MHz LSB (inverting)
Downlink: 145.960-145.990 MHz USB
Telemetry Tx: 145.940MHz
All FUNcube transponders are sponsored by AMSAT-UK and AMSAT-NL. We are very
grateful for the assistance given by Innovative Solution In Space Bv, The
Netherlands.
_______________________________________________
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Hi All,
Is anyone else noticing any issues with the JY1-sat dashboard? I
can start it with the sat present and it will instantly lock and track,
next pass it will ignore the signal, kill it and restart it and bam
instant lock.
73 Kevin WA7FWF
I've written a new Ground station for FalconSat-3. If you had an initial go
with WISP without success or if you have never tried to decode FalconSat-3,
now is a good time to try. This requires much less setup than WISP. And
don't be put off if you don't have a hardware TNC, this will work with a
soundcard TNC. Or, if you didn't try to listen to FalconSat-3 because you
don't have a station that can transmit commands to the spacecraft, then
read on. We still need your help to decode telemetry.
In particular we would like to encourage people to download the Telemetry
and forward it to an AMSAT telemetry server. Currently more telemetry is
generated than we can download with AMSAT Operations ground stations.
Receive only stations can contribute to that as well as stations equipped
to transmit to FalconSat-3 and request files. You can see telemetry
uploaded so far here: http://tlm.amsatfox.org/tlm/FalconSat-3
There are details about the spacecraft, how to install the software and how
it works in the manual available if you download the software or online
here: http://www.g0kla.com/pacsat/pacsat_ground_manual.pdf
You can download the software at www.g0kla.com/pacsat/index.php. I have
also written some blog posts and thoughts about the software for anyone
interested. They are linked from the download page.
There is much to do here of course and most of it probably won't get done.
I would call this a beta release. If you have suggestions or bug fixes
please log them online at https://github.com/ac2cz/Falcon/issues or send me
an email.
The software is open source. All the details are here:
https://github.com/ac2cz/Falcon/ The telemetry processing and display
leverages common code from FoxTelem in a library here:
https://github.com/ac2cz/libTelem/
--
Chris E. Thompson
chrisethompson(a)gmail.com
g0kla(a)arrl.net
Hi All,Just to confirm that AO73 is now in continuous education mode with the high power telemetry. Amateur mode may be expected to resume on Thursday morning(UTC)73GrahamG3VZV
Hello,
We need 2 LVB Tracker interfaces, does anyone have 1 or 2 that they can sell ?
Thank you
Rick kb4bsa
rick(a)rickhardinjr.com
Sent from Mail for Windows 10
Dear friends and fans of GNU Radio,
GNU Radio Conference celebrates and showcases the substantial and
remarkable progress of the world's best open source digital signal
processing framework for software-defined radios. In addition to presenting
GNU Radio’s vibrant theoretical and practical presence in academia,
industry, the military, and among amateurs and hobbyists, GNU Radio
Conference 2019 will have a very special focus.
Summer 2019 marks the 50th anniversary of NASA's Apollo 11 mission, which
landed the first humans on the Moon. GNU Radio Conference selected
Huntsville, AL, USA as the site for GNU Radio Conference 2019 in order to
highlight and celebrate space exploration, astronomical research, and
communication.
Space communications are challenging and mission critical. Research and
development from space exploration has had and continues to have
far-reaching effect on our communications gear and protocols.
Please join us September 16-20, 2019 at the "Huntsville Marriott at the
Space & Rocket Center" hotel for the best technical conference of the year!
Amateur satellite communications has a central place.
Registration and an online and mobile-friendly schedule will be posted at
the conference web site:
https://www.gnuradio.org/grcon/grcon19/
Call for All!
We invite developers and users from the GNU Radio Community to present your
projects, presentations, papers, posters, and problems at GNU Radio
Conference 2019. Submit your talks, demos, and code! Please share this Call
for All with anyone you think needs to read it.
To submit your content for the conference, visit our dedicated conference
submission site at:
https://openconf.org/GRCon19/openconf.php
First round closes 1 July 2019. If accepted, your content will be
immediately scheduled.
Final round closes 1 September 2019. Space permitting. Pun intended.
If you have questions or need assistance with OpenConf, or have content
that doesn't quite fit and you want to talk it over, please write
grcon(a)gnuradio.org
Topics may include but are not limited to:
Space (including ground stations)*
Amateur radio
Radio astronomy
Atmospheric research
Theoretical work
Practical applications
Aviation
Biomedical
Citizen Science
Digital Signal Processing
Education
Radio Interface
Machine Learning
Cognitive Radio
Transportation
Wireless security
*special focus awards given to all accepted work with Space as a topic!
-Michelle W5NYV