Hello everybody,
I agree with Trevor, GS requirement for the 2.4 GHz band are quite
challenging.
Anyway, I have another question, what kind of orbit this constellation will
be designed for?
If it is less than 500 km, how many *months* will it last?
73s
Fabio
iz5xrc
On Mon, Feb 10, 2014 at 8:43
HelloFabio,
fromexperiencewithFITSAT-1,thelaunchtook placefromtheISS( orbit ~ 400km).
Thelifetime willbeupapprox.9months.
But, thisisinfluencedbytheshapeandsizeof thesatellite.
73´s de
Michael, DD5ER
--
AMSAT-DL e.V.
-- International Satellites for
Communication, Science and Education --
Just in case anyone was curious about the practicality of actually transmitting
WiFi from a cubesat, I did a quick link budget. Based on typical 802.11 specs,
the MDS of a receiver is about -90 dBm. The path loss at 2.4GHz between a
ground station and a satellite overhead in a 600Km orbit is a
As the birds dropped out of the sky above the ground station, there might be
some objections. What has to happen for long range, gigabit bandwidth, is a wide
frequency range with little time on any particular frequency so that there is no
concentrated effects on a single frequency where heating
Yes, a dish needed, ISS HamTV provides a good illustration of the requirements
to achieve a 2 Mbps downlink at 2400 MHz.
73 Trevor M5AKA
On Monday, 10 February 2014, 18:16, Howie DeFelice howied...@hotmail.com
wrote:
Just in case anyone was curious about the practicality of actually
for the life of me, I can't think where we could find 70 Mbytes
of ham radio content. Not useful content, anyway.
A good example is the way some people stream live tracking data for all
satellites in view plus an update to the DX list of passes over the next 3
hours that is captured and
Hi Michael,
It'll be a weak lower-bit rate 802.11 signal since a 1U CubeSat could only
provide an RF output of around 0.4 watts at 2400 MHz but it's certainly
feasible.
Signals probably won't be receivable in urban areas due the strength of other
WiFi signals but my understanding is the
Already Ham Radio has the technology, bandwidth, and evreything needed to
implement distribution of over 70 megabytes of Ham Radio data to every
mobile and handheld operator every day. That's a lot of content.
And the frequencies exist, and the sites exist. THink about it. Every
single VOICE
On 08-02-14 14:24, Robert Bruninga wrote:
Already Ham Radio has the technology, bandwidth, and evreything needed to
implement distribution of over 70 megabytes of Ham Radio data to every
mobile and handheld operator every day. That's a lot of content.
And the frequencies exist, and the sites
On 02/08/2014 09:24 AM, Robert Bruninga wrote:
Any ham wanting to collect this content simply puts his 96000 baud radio
listing to that repeaer INPUT to join the net! An AP runs together
building a buffer of that 70 megabytes of ham radio content per day, which
is then instantly accessible
AMSAT-NA FTP server was almost 3.5 GB last time I checked.
On Sat, Feb 8, 2014 at 3:15 PM, Gus g...@8p6sm.net wrote:
On 02/08/2014 09:24 AM, Robert Bruninga wrote:
Any ham wanting to collect this content simply puts his 96000 baud radio
listing to that repeaer INPUT to join the net! An
11 matches
Mail list logo
