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
Hello All,
An APRS payload from AMSAT INDIA will be flown on PSLV C45. The launch is scheduled on April 1st 2019 at 09:27 IST / 03:57 UTC. The payload will be powered on approximately over Sweden,Norway,Denmark, Finland, Poland and Moscow.We request stations at these locations to report the first signals (145.825 Mhz) from the payload.We also request the Amateur Radio fraternity worldwide to use the payload and Satgates to feed the traffic. More details about this unique project is available at http://www.amsatindia.org
The prelaunch TLE are also available for download on http://www.amsatindia.org
73
Nitin [VU3TYG]Secretary, AMSAT INDIA
All:
Pictures of the new FT-897D I have for sale can be found here:
https://www.youtube.com/watch?v=HMT7wqqNjjM
Sale goes to buyer with the best offer. Please contact me direct:
dxdx(a)optonline.net
Payment must be via Paypal. Shipped to U.S. buyers Only
Thank you,
Tony
All:
I purchased a new unopened box Yaesu FT-897D from an estate sale. It
came with the FP-30 A/C power supply and a Yaesu 300 Hz CW filter that
was also unopened in the box. I tested the radio and it looks and
functions like a new transceiver.
It's an all-mode HF, 50/144/430 MHz radio that comes with 60 meters and
the TXCO from the factory. It can be used with internal batteries or the
internal FP-30 A/C power supply that it came with.
It's not a full-duplex VHF/UHF transceiver but can be used with satellites.
I can provide pictures for those interested. My email address is:
dxdx(a)optonline.net
Tony -K2MO
