{"id":10393,"date":"2009-05-24T11:37:00","date_gmt":"2009-05-24T01:37:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2009\/05\/24\/radio-signals-from-jupiter-and-io-on-17-meters\/"},"modified":"2025-07-22T04:23:14","modified_gmt":"2025-07-21T18:23:14","slug":"radio-signals-from-jupiter-and-io-on-17-meters","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2009\/05\/24\/radio-signals-from-jupiter-and-io-on-17-meters\/","title":{"rendered":"Radio Signals from Jupiter and Io on 17 Meters"},"content":{"rendered":"
\"\"<\/a>Jupiter and Io montage captured by the New horizons spacecraft. <\/span>
The Jupiter image is false-color near IR data obtained with the LEISA instrument, built at GSFC.<\/span><\/div>\n

I try to always read the QRP-L postings of NA5N — Paul always has something interesting in his messages. Today I found this:
Jupiter emissions peak around 18-22MHz; they are a function of when the moon Io crosses certain longitudes of the relatively fast spinning Jupiter. There used to be a couple of calculators online (haven’t checked lately) as to when the L-bursts should occur. The timing is quite predictable; detecting them on every predicted occurrence is not.<\/span> You have to have an antenna with a little bit of gain. The signals are generally weaker (that is, near the <\/span>atmospheric noise level<\/span>) than can be detected with a dipole.<\/span> With a fairly decent setup, the Jovian L-bursts sounds like ocean waves crashing on a distant beach, just barely above the noise level. The S-bursts sounds like random pulse type static in short bursts. These are harder to detect than the L-bursts.<\/p>\n

<\/span>I had known about the Jovian radio emissions, but I didn’t know that the moon Io was involved. For me, Io’s involvement somehow makes this even more interesting. <\/span>Jupiter and its moons (including Io) are some of the few celestial objects I can regularly see from central Rome. <\/span><\/p>\n

<\/span>Here is a good description of Jupiter’s radio signals, and Io’s role in transmitting them:
http:\/\/radiojove.gsfc.nasa.gov\/library\/sci_briefs\/decametric.htm<\/a><\/p>\n

And here is an interesting article about the discovery (50 years ago) of these signals:
http:\/\/radiojove.gsfc.nasa.gov\/library\/sci_briefs\/discovery.html<\/a> <\/span>
<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Jupiter and Io montage captured by the New horizons spacecraft. The Jupiter image is false-color near IR data obtained with the LEISA instrument, built at GSFC. I try to always read the QRP-L postings of NA5N — Paul always has something interesting in his messages. Today I found this:Jupiter emissions peak around 18-22MHz; they are … Continue reading “Radio Signals from Jupiter and Io on 17 Meters”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":10394,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-10393","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomy"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/10393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=10393"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/10393\/revisions"}],"predecessor-version":[{"id":10395,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/10393\/revisions\/10395"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/10394"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=10393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=10393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=10393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}