to my AO-7 afictionados...what is the maximum distance one can work edge to
edge, and how did you figure that out?
73 Bob W7LRD
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--- On Sun, 30/9/12, Robert Bruninga bruni...@usna.edu wrote:
With an FM downlink, anyone can receive it with an HT and a
laptop with PSK-31 software. And anyone with a 10m PSK-31 uplink
can transmit to it.
The SSB uplink and UHF downlink transponder fits on a
smaller than 3x3 circuit board
It is reported that the ISS CubeSats will be deployed on October 4 at 1435 UT
See http://www.amsat-uk.org/?p=10119
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
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I presume the reason for UHF downlink rather than
145 MHz, with it's lower Doppler shift, is due to
other mission constraints ?
Yes, avoid QRM to the 145.825 APRS transponder.
BTW is the uplink in the amateur satellite segment
of 10m (29.3-29.5) or down at the bottom of the band ?
Bottom
The first satellite, Sputnik-1
Launch of Sputnik-1, 4 Oct 1957
Satellite Catalog Number 1 is given in the rocket
Sputnik /Sputnik (A, SL-1) which launched Sputnik-1.
Satellite Catalog Number 2 is SPUTNIK-1 1957-001B
http://www.ne.jp/asahi/hamradio/je9pel/sputnik1.htm
JE9PEL, Mineo Wakita
Bob,
Since the height above ground varies due to the elliptical nature of
orbits the max range also varies. Where the two stations are located
relative to the apogee of the orbit can also come into play. If you
are on the wrong side of the earth when the satellite is at its apogee
that could be a
Hello all,
As a part of our effort to continue promoting the proper use of the amateur
radio satellites by the Cuban ham community and added to the several
radio-conferences that Hector (CO6CBF), Pavel (CO7WT) had performed in the past
months.
It's a big pleasure to announce that we start
Hi Bob,
Draw the ground circle on a lambert conformal chart, and you can measure
the distance directly...From your location use the distance from you to
the west end of Florida, according to my ANCIENT OSCAR LOCATORThat
will probably warm the cockles of some old timer's hearts...Who is
On 10/01/2012 02:47 AM, Bob- W7LRD wrote:
to my AO-7 afictionados...what is the maximum distance one can
work edge to edge, and how did you figure that out?
73 Bob W7LRD
Maximum communications distance:
MCD = 2 R arccos [ R / (R + h) ]
where
R = Radius of earth (Spherical earth:
On 10/01/12, Bob- W7LRDw7...@comcast.net wrote:
to my AO-7 afictionados...what is the maximum distance one can work edge to
edge, and how did you figure that out?
73 Bob W7LRD
Bob -
Here's my take on your question. In addition to the orbital variations, there
are at least two other
On 10/01/2012 02:47 AM, Bob- W7LRD wrote:
to my AO-7 afictionados...what is the maximum distance one can work
edge to edge, and how did you figure that out?
73 Bob W7LRD
Did you spot the error in my math, deliberately made to test you? :)
No? Well Steve did. Hard to believe I actually used
Hi Dave, WB6LLO
I am also still around with my old OSCAR LOCATOR with aquisition
circle and orbital track for OSCAR-7 ,it warm the cockles of my old
timer heart !
I developed an OSCAR LOCATOR for the orbit of the first P3-A HEO
satellite wich failed to go into orbit due to a malfunction of
Ive started experimenting with converters and/or transverters on my
Flex5KA, using it as my receiver and an FT-847 as the uplink. I use SatPC32
to control both radios. I've got the Flex setup as rdaio 1 using the
Kenwood TS-2000 configuration and radio 2 is set to the FT-847. It seemed
to work for
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