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.
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FUNcube frequencies and other details
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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.
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Students at the Ivy League Brown University are developing an amateur radio satellite EQUiSat that will carry a Xenon Flash Tube (XFT) subsystem to act as an Optical Beacon that should be visible to the unaided eye of observers on Earth.
See http://www.uk.amsat.org/?p=10635
73 Trevor M5AKA
AMSAK-UK http://www.amsat-uk.org/
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Thinking about adding the 1.2Ghz module for my 9100. Prices have dropped a little and units will start become harder to find once production ends. Anybody using this band? I read it's used as a uplink frequency for some satellites. Any input appreciated.ToddAL7PX
The Outernet L-band feed is now carrying a condensed version of the AMSAT
and ARISS weekly news files. (Global Geosat coverage except for Northern
Alaska)...
Receivers are simple: http://aprs.org/outnet.html
For ARISS, I manually added a 2 char grid square to each school listed in
the school schedule and am asking the outernet folks to parse out that
location info and plot a 1200 km footprint on their weather globe showing
where people can tune in the ARISS contacts. Then their RTL-SDR dongle
could then actually be retuned to hear the contact. Just an idea...
Bob, WB4APR
-----Original Message-----
From: AMSAT-BB [mailto:[email protected]] On Behalf Of Dani
EA4GPZ
Sent: Saturday, October 15, 2016 7:36 AM
To: amsat-bb(a)amsat.org
Subject: Re: [amsat-bb] New Outernet L-Band service...
>> I hope someday a service like this will be available
>> from an AMSAT geostationary service.
> I'm pretty confident that the guys at AMSAT-DL are capable
> of doing this much better on the upcoming EsHail'2
> than what Outernet is currently doing on Inmarsat...
> They already have in mind a "DVB-S beacon"... broadcast
> from the ground station at Qatar ... carrying videos
> about Ham radio and Ham radio events on this signal.
> What is more, if you have equipment to operate EsHail'2 on SSB,
> it's more or less easy to use either the narrowband transponder
> or the wideband transponder to transmit an Outernet-type signal
> through EsHail'2, so anyone can have a go with this.
> Outernet uses 4200baud BPSK and half of the bitrate is spent for FEC.
> You can use a bit less bitrate to get a signal that will even pass
> through a conventional 2.7kHz SSB filter and you can use less
> bits for FEC to get increased data throughput (but more SNR required).
> Dani EA4GPZ.
Hi Paul,
I have already left a note to the webmaster, no reply yet.
I tried to download from the link in the receipt e-mail, and a message comes back saying that I have no downloads available.
I have not down loaded squat, yet.
Thanks in advance, for any help on this.
I am so excited about the launch..
Jack
KD9ERA
Does anyone know if it is possible to output a serial port signal when a
satellite is in view.
I would like to switch an external relay circuit when a particular
satellite is in view.
Regards
Joe - VK5EI
Microsoft seems to be getting rid of DDE support. Does anyone have some C# or VB2017 DDE client code that can be built under Visual Studio 2017?
Thanks,
Richard W5SXD
Hi all,
A few days ago I have transmitted and recorded a (low-power) FT8 signal
through the FO-29 linear transponder to test some Doppler correction
algorithms I'm developing (see
http://destevez.net/2017/10/wsjt-x-and-linear-satellites-part-ii/)
After Doppler correction, I'm left with a linear frequency drift both in
my downlink signal and in the satellite CW beacon. However, the drift
rate of my signal and the beacon are different. Specifically, my signal
drifts 1.26 times faster than the beacon. I suspect that this drift is
due to one of the local oscillators in FO-29.
To understand this better, I need to look at a block diagram of the
FO-29 linear transponder. The best I've found is this:
http://www.jarl.org/English/5_Fuji/systeme.gif
However, I need something similar to this:
https://funcubetest2.files.wordpress.com/2010/11/funcube_rf_board_block_dia…
Since I need to see the frequencies of all the local oscillators
involved in the transponder and CW beacon.
Is there a more detailed block diagram for FO-29 or does anyone know
something about this information?
73,
Dani EA4GPZ.