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Karl
2013-Sep-18, 04:52 AM
Amateur radio operators have the opportunity to join together and send a message to the Juno spacecraft during its Earth gravity assist on October 9, 2013.

If enough amateurs participate, the signal should be visible in the Juno science telemetry.

http://www.jpl.nasa.gov/hijuno

LookingSkyward
2013-Sep-18, 08:09 AM
Thanks Karl!
I've posted this on my local Ham radio club site, and will try to get wider distribution in the Pacific Northwest!

73,
dave

Karl
2013-Sep-18, 11:23 AM
Thanks Karl!
I've posted this on my local Ham radio club site, and will try to get wider distribution in the Pacific Northwest!

73,
dave

Thanks!

Approval to try this came too late to get it in QST. The ARRL has put it out on their web site as a news item, so googling it comes up with an impressive number of hits. There has been response from every continent. Look for special event stations in the week ahead of the event to get the word out.

73,
Karl

Karl
2013-Oct-05, 12:05 PM
Even with a government shutdown, the laws of gravity are still in effect and the Juno EFB will take place as scheduled. The JPL website will not be updated. Luckily the script on the web page is set and ready to go, so the event will proceed as planned.

http://www.jpl.nasa.gov/hijuno

Karl
2013-Oct-10, 11:46 AM
QSL requests can be sent to juno_outreach@jpl.nasa.gov

Karl
2013-Dec-13, 01:32 AM
It worked!

http://www.youtube.com/watch?v=_yqHy_MpNiQ&feature=youtu.be

Swift
2013-Dec-13, 02:22 AM
It worked!

http://www.youtube.com/watch?v=_yqHy_MpNiQ&feature=youtu.be
:cool:

ravens_cry
2013-Dec-13, 02:46 AM
I am not ashamed to admit that made me tear up a little in a very good way.

neilzero
2013-Dec-13, 02:42 PM
None of the posts explained what worked? Did the ham radio signals show up on the telemetry? What frequency did the hams transmit at or did it make no difference?

Swift
2013-Dec-13, 03:01 PM
None of the posts explained what worked? Did the ham radio signals show up on the telemetry? What frequency did the hams transmit at or did it make no difference?

Yes, the signal showed up in the telemetry - this video shows the signal: http://www.jpl.nasa.gov/video/?id=1263

This eham.net article gives details (http://www.eham.net/articles/31375)

In a first-of-a kind for an interplanetary spacecraft, NASA's Juno spacecraft in October was able to detect Amateur Radio signals transmitting "HI" in coordinated, very slow-speed CW. More than a thousand radio amateurs around the globe greeted Juno October 9 as it looped past Earth for a gravity-assisted boost on its way to Jupiter. Participants were invited to spread out across 10 meters to transmit "HI" in very slow speed CW (1/25 WPM), sending 30 second dits punctuated by 30 second spaces and 90 seconds between the two characters.

"The second 'HI' was detected clearly," University of Iowa researcher and Waves Principal Engineer Don Kirchner, KD0L, told ARRL, noting that the distance to the spacecraft was about 37,500 kilometers (23,250 miles). "The signals were usually just at or above the noise level, although at closest approach the first three dits of the 'H' had significantly higher signal levels," Kirchner continued. "A possible explanation is that for a short time we were inside the ionospheric waveguide and, as we increased in altitude, went back above it for the last dit." Shortly after that, Kirchner said, the spacecraft went into safe mode, so outbound data were lost.

The experiment involved 16 identical transmission rounds or cycles and ran a bit longer than 2-1/2 hours all told (1800 to 2040 UTC). The object of the experiment was to see if Juno's onboard "Waves" experiment would be able to detect the collaborative RF. Spreading out participants on a wide range of 10 meter frequencies was intended to improve the chance of the Waves instrument's hearing the ham signals. The detector has a bandwidth of 1 MHz.

According to the University of Iowa, after the flyby the Juno team evaluated the Waves instrument data containing the messages. Kirchner notes that while previous space missions -- Galileo on its way to Jupiter, and Cassini headed for Saturn -- were able to detect shortwave radio transmissions during their Earth encounters, it was not possible to decode intelligent information using the data from those spacecraft.

"We believe this was the first intelligent information to be transmitted to a passing interplanetary space instrument, as simple as the message may seem," said Bill Kurth, a University of Iowa Researcher and Lead Investigator for the Waves instrument. "This was a way to involve a large number of people -- those not usually associated with Juno -- in a small portion of the mission."

Lord Jubjub
2013-Dec-17, 11:04 PM
Little bit late to the thread, but the first thing that came to mind when I heard the results. . .

Horton Hears a Who

Karl
2013-Dec-17, 11:30 PM
Some additional information can be found here: http://www.centauri-dreams.org/?p=29648

Noclevername
2013-Dec-18, 02:11 PM
Little bit late to the thread, but the first thing that came to mind when I heard the results. . .

Horton Hears a Who

"My name is Juno, and I'm an alcoholic."
"Hi, Juno!"

But seriously, it's very cool.

ravens_cry
2013-Dec-18, 05:52 PM
Little bit late to the thread, but the first thing that came to mind when I heard the results. . .

Horton Hears a Who
That was one of my thoughts as well.:dance: