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.
_______________________________________________
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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
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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Beware: HF content !
In addition to the obvious time and frequency applications there is also
a
plethora of propagation science that can easily be accomplished by even
us mere amateurs.
To demonstrate x and o mode propagation, I have often used a setup where
I
GNSS PPS trigger a regular analogue or digital oscilloscope measuring
the
audio beat of the received timing pulses. In this manner,the o/x mode
superimposed, time delayed aggregate pulse can be observed and the
individual
time variant (multipath) fading of the LHCP and RHCP combination can be
very
easily observed and visually separated on the scope screen with a
regular
HF receiver and e.g. simple (linearly polarised) dipole.
Obviously both propagation paths can be observed separated in a similar
manner using a dual channel oscilloscope and a circularly dual polarised
HF antenna. Extremely interesting to study as the x and o mode MUF's
creep past the frequency of observation as a function of E and F layer
ionisation:
http://www.kolumbus.fi/michael.fletcher/HF_layer1_oblique_nvis_propagation_…http://www.kolumbus.fi/michael.fletcher/60m_band_1000km_oblique_o_mode_x_mo…
Michael OH2AUE
Remember that registration for Symposium goes from $60 to $65 at the
end of the day today.
Like any good amateur radio organization, we run on UTC, so the
early-bird $60 rate expires at 23:59:59 UTC.
73,
Paul, N8HM
I worked AG7E September 15 @ 1913z on AO-91 and looked to see if she was LOTW and per her QRZ.com page, she was not. So I sent a SASE to the current address. This morning I got the letter returned - "Attempted - not unknown - unable to forward". I was in Benton County WA in grid DN06.
Are you on the BB Helen?
Thank you
JohnN7AME
Hans:
With regard to your question about poor performance on your homebrew LFA-
My understanding is that resonance is greatly affected in long boom
Yagi-Uda arrays by the boom type. It is not simply a matter of changing
the dimensions of the DE but also the parasitic element lengths and
spacing. The ARRL Antenna book 23rd edition has a detailed section on
the new LFA and OFA antennas, and they caution readers to stick to the
'cookbook' closely or expect to spend a lot of time modeling the new
configuration. On short booms, the differences don't make so much
difference, but when the boom gets to be several wavelengths long it is
an increasingly important factor in radiation pattern and resonance of
the parasitic elements.
The difference in width of your loop and the DE width is likely also an
issue.
Have you done any computer modeling of your design?
Larry W8ANT