Hi All,
It is said that NiCad battery cells usually fail to short circuit and
that Lithium Ion ones usually fail by just loosing their ability to hold a
charge viz they go open circuit
Is this true or?
many thanks
Graham
G3VZV
___
Sent
FUNcube -1 – Launch details and time frame finalised
An agreement has now been reached with ISIS Launch Services BV, who are
based in Delft in the Netherlands, for them to provide a launch of the
FUNcube-1 CubeSat.
It is anticipated that FUNcube-1, which has been created by a team of
Subject: [amsat-bb] 1961-12-12: OSCAR 1
It's quite amazing when one considers the historical context:
1957-10-04: Sputnik 1 launched
1959-09-12: Luna 2 launched to moon, impacted 1959-09-13
1960-08-12: Echo 1 launched
1961-04-12: Vostok 1 with Yuri Gagarin
1961-05-05: Freedom 7 with Alan
Hi All,
I understand that here is still some uncertainty as to how many and which
cubesats will actually be taken into space on the Vega Maiden Flight. Not
all of the original 9 selected satellites have been fully completed in time
for the required pre-launch processes. I expect we will see
Hi Michael,
If i may, can I point out that the FUNcube project is on track to provide
two linear U/V transponders in low earth orbit from two cubesats quite soon
now.
These transponders will have a dual purpose - educational outreach to
encourage school children to become interested in STEM
How strong is the birdie?...would not a nice 30dB gain preamp raise the
incoming signals and noise level above it?
just a thought:)
73
Graham
G3VZV
-Original Message-
From: Ted
Sent: Tuesday, November 29, 2011 11:10 PM
To: amsat...@wd9ewk.net ; amsat-bb@amsat.org
Subject:
I am intrigued that the six objects from this launch seem not to be
separating as far/fast as I would have expected. After 4 weeks from launch
they all seem to be still close together. Do we know if the separation
springs were deliberately low power or what the separation speeds were
intended
Information for the students amongst our numbers
73
Graham
G3VZV
From: Cem Ozan Asma
Sent: Sunday, November 06, 2011 8:32 PM
To: t...@spacegeneration.org ; q...@vki.ac.be ; cube...@atl.calpoly.edu
Subject: [QB50] ESA sponsors students to attend the European CubeSatSymposium
(30 Jan - 1 Feb
Hi Peter,
Many thanks for the link. On our FUNcube cubesat mission we are promoting,
as one of the many educational outreach subjects, the opportunity for a
group to design and build such a ranging system using the U/V linear
transponder that we will be flying on board. The same functionality
Hi Roger,
All understood..I have put the currently 28? active Orbcomms into Nova here and
almost all of the time there is at least one above my horizon and I can hear
the chuffing noises..will be listening again this evening
Do you have details of the on board power system? For instance what
Hi Tony,
The chuff chuff noises are from space...they are a sort of beacon carried on
every Orbcomm satellite. They are 125msec long pulses of 57.6kb data and
have a bandwidth of around 50kHz. They are quite distinctive when you only
hear one at a time but sometimes one can hear two or more
Hi Jan,
Yes I believe the signals you are hearing (I can also hear them here most of
the time) are from one or more of the Orbcomm satellites. According to web
research they all (?20+) transmit a 125msec long burst of 57.6kb data on
137.560MHz. The signal appears to be approx 50kHz wide on
Hi Jan,
FWIW - my reading of the slightly old fashioned English text, is that the
command transmitter is on a frequency around 148MHz, that it uses two
tones and that the on board receiver and decoder is capable of
understanding 35 commands. As it happens, the ground segment for the Orbcomm
Hi Trevor,
Thanks for the links...the Administrative Council Minutes have some
particularly interesting items for us. It is good to see that a 50MHz
worldwide satellite service allocation (hopefully for up and downlinks) is
now top of their list of priorities and satellites are also be
Hi all,
We understand that the Edusat spacecraft from Italy has been successfully
launched today from Yasny on a DNEPR launcher.
It has apparently been granted an experimental licence by the Italian
Telecommunications Ministry to transmit on 435.750MHz but this frequency was
not submitted
Hi All,
Just popped outside from the IARU Region 1 Conference meeting to catch an
ARISSAT pass.
Good signals with an Arrow and a FCD and also using a G0MRF prototype filter
amplifier with 5v being supplied by the Dongle. (Thanks David for the loan)
Voice telemetry reported MET of 41 mins -
Hi All,
Just popped outside from the IARU Region 1 Conference meeting to catch an
ARISSAT pass.
Good signals with an Arrow and a FCD and also using a G0MRF prototype filter
amplifier with 5v being supplied by the Dongle. (Thanks David for the loan)
Voice telemetry reported MET of 41 mins -
hi All,
I have just come across this podcast which has a very British approach to
space history but is quite enjoyable
http://audioboo.fm/boos/431009-space-boffins-podcast2
Additionally a rather longer film entitled first orbit - this has the
exactly the same running time as Gargarin's flight
Hi All,
I believe we now have some TLEs for ARISSAT-1
It is catalogue number 37772 and referred to as Radioskaf-b
Approx 20 secs ahead of the space station at this time and appears to still
be less than 1 kilometre below
73
Graham
G3VZV
___
Sent
Hi Domenico,
Uum not quite - The Austrian conference paper refers only to repeaters that
have been established INSIDE the segment of the band allocated to satellite
operation ie above 145.800MHz.
The RV63 145.7875MHz operation has come as a result of the adoption of
12.5kHz channel spacing
Hi All,
Some quite up to date info about the new VEGA launcher can be viewed here
http://esatv-movies.e-vision.nl/videos/mplo/vega_tests_TV_05-10-11_wmplow.wmv
The maiden flight is expected to carry up to nine cubesats as secondary
payloads - more information is here:
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