[amsat-bb] AO-73/FUNcube Mode switch

[John Geiger]

I seem to remember seeing a recent email mentioning that AO73 is not using
these published frequencies. What are the current uplink and downlink
frequencies for AO73?

73 John AF5CC

On Thu, May 11, 2017 at 7:28 PM, Graham Shirville <
g.shirville at btinternet.com> wrote:

>
> Hi All,
>
> This is to let you know that AO-73/FUNcube is now in amateur mode for the
> weekend, with transponder activated. We are early this weekend due to
> ground station availability.
>
> As per normal, we will switch back to autonomous mode on Sunday pm UTC.
>
> 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. Low
> 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-c
> ommences-regular-operation/EO88
> Nayif-1 FUNcube-5EO88 is presently operating in autonomous mode. The
> transponder isoperational when the satellite is in eclipse, ie the solar
> panels are NOTbeing 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 USBTelemetry  Tx:
> 145.940MHzAll FUNcube transponders are sponsored by AMSAT-UK and AMSAT-NL.
> We are verygrateful for the assistance given by Innovative Solution In
> Space
> Bv, TheNetherlands.
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>
> _______________________________________________
> Sent via AMSAT-BB at 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
> _______________________________________________
> Sent via AMSAT-BB at 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
>