- https://books.google.com/books?id=COsLAAAAIAAJ&pg=PA804#v=onepage&q&f=false
- http://books.google.com/books?id=I-wRAAAAYAAJ&pg=PA1
Ferdinand Ellerman
- https://ui.adsabs.harvard.edu/abs/1940PASP...52..165A/abstract
- https://science.sciencemag.org/content/91/2362/330
- https://hdl.huntington.org/digital/collection/p15150coll2/id/807/
- https://iopscience.iop.org/article/10.1086/123738/pdf
- https://www.ifa.hawaii.edu/users/steiger/halleys.htm
- https://books.google.com/books?id=t-BF1CHkc50C&pg=PA332
- http://obs.astro.ucla.edu/150_hist.html
- https://est-east.eu/?option=com_content&view=article&id=823&lang=en&Itemid=622
- https://books.google.com/books?id=PCrq8gA0-LsC&pg=PA97&lpg=PA97
- https://www.findagrave.com/memorial/60988154/ferdinand-ellerman
- http://photoarchive.lib.uchicago.edu/db.xqy?show=browse6.xml%7C88
- https://calisphere.org/item/c95523d635b64ca5e05561accdfbe601/
- https://commons.wikimedia.org/wiki/Category:Ferdinand_Ellerman
- https://www.google.com/books/edition/New_Millennium_Solar_Physics/qdyZDwAAQBAJ?hl=en&gbpv=1&pg=PA198
- https://www.google.com/books/edition/Hearst_s_International/al0wAQAAMAAJ?hl=en&gbpv=1&pg=PA766
- https://www.google.com/books/edition/Fundamentals_of_Solar_Astronomy/fe7XDuxCYjcC?hl=en&gbpv=1&pg=PA219
- https://www.google.com/books/edition/Popular_Astronomy/cL4zAQAAIAAJ?hl=en&gbpv=1&bsq=Ferdinand+Ellerman
- https://www.google.com/books/edition/Yerkes_Observatory_1892_1950/Z4tSCJ_3u-kC?hl=en&gbpv=1&pg=PA25
Decametric radio astronomy is the observation of decametre, or high frequency radio emission by astronomical objects. These transmissions occupy the radio frequencies between 3 and 30 megahertz (MHz), which is used for shortwave radio.
- Resolution
History
- Franklin and Burke in 1955
- Jansky
- 3C & MSH catalogues
Interference
- Ionosphere
- Sunspot cycle
Telescopes
- Telescope array
- Space-based Radio Telescope
- Dominion Radio Astrophysical Observatory
- Nançay Radio Observatory
- URAN
- UTR-2
- Goddard Decametric Radio Telescope
- UAE Decametric Radio Telescope
Targets
- Sun
- Jupiter
- Galactic
- SNR
- H II regions
- Loop 3
Jupiter[edit]
In 1955, B. F. Burke and K. L. Franklin announced the detection of a source of variable radio emission associated with Jupiter. This was performed using a "Mills Cross" antenna of the Carnegie Institution in Washington D.C., which operated at 22.2 MHz. They found no correlation with the rotation period of the planet or with solar activity,[1] and so initially attributed it to thunderstorm-like activity in Jupiter's atmosphere.[2] This signal was confirmed by C. A. Shain using old cosmic noise observations taken from Fleurs Field Station near Sydney. In addition, it was shown that the noise came from a specific location on the planet. Observations made by F. F. Gardner and Shain in 1955 showed the emission varied in intensity, resembling solar noise with bursts of radiation lasting around a minute. They suggested the source was an ionized region of the Jovian atmosphere radiating at a critical frequency of ~20 MHz.[3]
Costain, Lacey & Roger (1969)
References[edit]
- ^ Burke, B. F.; Franklin, K. L. (June 1955), "Observations of a variable radio source associated with the planet Jupiter", Journal of Geophysical Research, 60 (2): 213–217, Bibcode:1955JGR....60..213B, doi:10.1029/JZ060i002p00213.
- ^ Burke, B. F.; Franklin, R. L. (1955), "High resolution radio astronomy at 13.5 meters.", Astronomical Journal, 60: 155, Bibcode:1955AJ.....60R.155B, doi:10.1086/107147.
- ^ Gardner, F. F.; Shain, C. A. (March 1958), "Further Observations of Radio Emission from the Planet Jupiter", Australian Journal of Physics, 11: 55, Bibcode:1958AuJPh..11...55G, doi:10.1071/PH580055.