315w exceeds the total power budget for the Voyager 1 spacecraft, which
is currently 254.6 watts.
The only reference to the transmitter power I can find suggests that it
is 20 watts. The 315 is probably EIRP, but that is not what was being
quoted for the Pluto probe. They both seem to have
Lets not forget to include Madrid (Spain) and Canberra (Australia) in the
above story, without them Goldstone cant do it on it's own. One station
may start the transmission, but every 8-12hrs each station seamlessly hands
over to the next to provide continuous coverage at the earth rotates. It's
. It was not easy!
73, Ed - KL7UW
---
From: brian als...@nc.rr.com
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] QRP signals from Pathfinder probe (off topic)
Message-ID: 55a80893.4040...@nc.rr.com
Content-Type: text/plain; charset=windows-1252
I decided to spend a minute googling, here's a paper with a lot of cool
tech details:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.466.3341rep=rep1type=pdf
73 jeff wk6i
On Thu, Jul 16, 2015 at 11:31 AM, Jeff Stai wk6i.j...@gmail.com wrote:
Well, at least they have big antennas. ;)
Heard last night on Nova program that the transmitter on the Pathfinder Pluto
probe was 10 watts. Anyone have a clue as to the signal path loss at 3 billion
miles and what levels the deep space dish receiving networks are dealing with?
Incredible that the data stream can be extracted from
Well, at least they have big antennas. ;) I read the other day on the NOVA
website that New Horizons will be downloading the data acquired in the
flyby at a data rate of only 1 kb/s - think 1200 baud modem for those of
you old enough to remember them. And there was another fascinating article
Here's another paper that details the RF side of things. They needed an
Ultra-Stable Oscillator, as well :-)
http://www.boulder.swri.edu/~tcase/NH%20RF%20Telecom%20Sys%20ID1369%20FINAL_Deboy.pdf
-Brian N9ADG
__
Elecraft mailing
It would seem that the DX record is held by the Voygers which long ago
left the solar system.
I don't know their power but they still check in from way beyond
Pluto. So NewHorizons is DX but not real DX YET.
73 de Brian/K3KO
On 7/16/2015 18:31 PM, Scott Simpson wrote:
some discussion
Voyager is still going strong many times further away than Pluto, 315w to a
3.7m dish. from over 19 billion KM.
a...@sbcglobal.net wrote:
Heard last night on Nova program that the transmitter on the Pathfinder
Pluto probe was 10 watts. Anyone have a clue as to the signal path loss
at 3
on GPS receivers. Transmission flight of
path is six hours.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
a...@sbcglobal.net
Sent: Thursday, July 16, 2015 11:10 AM
To: Elecraft Reflector
Subject: [Elecraft] QRP signals from Pathfinder
some discussion including calculation of losses around 147db here:
https://www.reddit.com/r/amateurradio/comments/3d93en/the_radio_signal_from_the_new_horizons_spacecraft/
scott
sasimp...@gmail.com
On Thu, Jul 16, 2015 at 1:10 PM, a...@sbcglobal.net wrote:
Heard last night on Nova program
Certainly, with a proper transverter (or down converter) and adequate
receive antennas, the K3 could serve as a suitable IF. The decode of
the received data is quite another matter.
Will anyone do that with their K3, I don't know, but the K3 is capable
enough given an adequate down converter.
On Thu, Jul 16, 2015 at 4:33 PM, Edward R Cole kl...@acsalaska.net wrote:
= -146.5 dBm
=
Very good, Ed, thanks. I'm sure they use some sort of FEC encoding like
that of the JT software. If I understand that correctly, such a signal can
be decoded if it's a couple of s-units,
Here is details on spacecraft design and on the RF comms subsystem.
Interesting reading
http://www.boulder.swri.edu/pkb/ssr/ssr-fountain.pdf
The New Horizons Spacecraft - Johns Hopkins Applied Physics Laboratory
: rick.ag...@gmail.com rick.ag...@gmail.com
To: elecraft@mailman.qth.net
Sent: Thursday, July 16, 2015 3:35 PM
Subject: Re: [Elecraft] QRP signals from Pathfinder probe (off topic)
Here is details on spacecraft design and on the RF comms subsystem.
Interesting reading
http
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