View Full Version : Juno Needs Radio Amateurs!

10-09-2013, 02:43 PM


NASA's Juno mission to Jupiter will perform a close 'fly-by' of the Earth in a few hours. To assist with its radio and plasma wave experiment, the mission is asking amateur radio operators to send a 'Morse Code' message to the probe as it passes."

The page has all the info you need: "The activity will begin at 18:00 UTC on October 9, 2013 and continue until 20:40 UTC. This page will clearly indicate when you should key up or key down to transmit 'HI' to Juno in Morse Code (see examples below). The Morse code pattern below can also act as a guide.

The 'HI' message will be repeated every 10 minutes, beginning at 18:00, 18:10, 18:20, etc. "

10-09-2013, 03:16 PM
Realize this is happening right now, about 23 minutes left as I type 09 OCT 2013 @ 1417 MDT. I was operating at 28.127.00 for a while but the IC-7000 was getting into the red zone, so I'm letting it cool.

Caribou Sandstorm
10-10-2013, 07:35 PM
Dave, how did that go? Maybe dumb question but were they somehow acknowledging your message?

10-11-2013, 07:10 AM
The Juno spacecraft will receive the message on multiple frequencies so I suspect they'll confirm based on QSL contacts. I tell them what frequency I worked and what time, they correlate it against the log to see if it was received and decoded. When I would ID it was a lot faster than 1/25th WPM they wanted the message. Since I was using an autokeyer it was sending my call sign at 25 WPM, so 625 times faster than Juno wanted. When you decode background noise, say you're doing RTTY or some other non-CW data, you'll get a slow stream of random characters at maybe one or two per second. It does not have to be high speed at all to mimic that.

Even if it could process and decode call signs that fast I doubt they'd want to dedicate the storage to do anything with it. They were calibrating an experimental instrument, so it's not so much about receiving detailed information because I believe the device is designed to study EM properties of the Jovian (gaseous) atmosphere. It's learning about the wave properties themselves, e.g. the carrier so to speak. Think of it as listening to the atmospheric white noise on HF trying to understand what it's telling you about the composition.

It's kind of cool because I worked on the bus for Juno, one of the C&DH ADC cards that they use to fly the spacecraft.

04-26-2014, 04:26 PM