Oya et al. 2002, "Analyses Of Jovian Decametric Radiation S-Bursts Interacting With N-Bursts"

I review Oya, Masaru; Oya, Hiroshi; Ono, Takayuki; Iizima, Masahide; 2002, "Analyses Of Jovian Decametric Radiation S-Bursts Interacting With N-Bursts"
http://adsabs.harvard.edu/abs/2002EM%26P...88..187O

Abstract: "Dynamic spectra of S-bursts of Jovian decametric radiations are obtained by using a high time resolution radio spectrograph which has a time resolution of 2 msec and the bandwidth of 2 MHz. Within occurrence of 65 S-burst events observed in the period from 1983 to 1999, 26 events have been identified as the S-N burst events, which are characterized by the interaction between the S-burst emissions and the Narrow band emissions. In the dynamic spectra of the S-N burst, the trend of emissions with negative and slower frequency drift named as “Trailing Edge Emission” are often observed shortly after the appearance of the S-burst. Detailed analyses of these phenomena revealed that the Trailing Edge Emission is not a manifestation of S-burst with slower drift rate but a variation of N-burst. The results suggested that S-burst and the associated Trailing Edge Emission are formed simultaneously started from a common region with different drift rates. It has been further suggested that the appearance of the S-bursts is not controlled by the geometrical effect between the source region and the observer, but directly reflects the generation of the source region widely distributed in an altitude range from a few thousands km to 30,000 km, along the Io flux tube."

Io-B with Narrow radiation, at Nancay on 111101

Other posts about N events:
http://herrero-radio-astronomy.blogspot.com/search/label/type%20N 

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Io-B low pass with interesting double Narrow band radiation, followed by non-Io-A, at Nancay on 110924

My gratitude to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Visu_routine plots:
B-W linear - Bottom stretch 25 - Top stretch 40 - Gamma 1.0

Io-B with Narrow radiation followed by non-Io-A on 110916-110917

CQ QST http://herrero-radio-astronomy.blogspot.com/ QRA N7YBV 73

My gratitude to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan
http://satorchi.net/nancay/rh/index.php

The complex morphology of type N Jovian decametric radiation

I refer to:

Flagg, Greenman, Reyes, and Carr, 1991, "A Catalog of High Resolution Jovian Decametric Radio Noise Burst Spectra, Volume 1" :
http://adsabs.harvard.edu/abs/1991STIN...9127047F

Section 3.5.2 describes N events.

I quote:

"...An N-event is a narrow band of emission which consists of either quasi continuous activity (narrow-band L-burst) or a train of narrow bandwidth S-bursts. The emission band is typically a few hundred kilohertz wide and often exhibits complex interactions with wide bandwidth S-bursts and other drifting features. N-events often exhibit exceptional frequency stability in the sense that the overall emission envelope may persist in a narrow frequency band for several minutes. Riihima has reported N-events lasting as long as 50 minutes while remaining within a 2 MHz wide frequency band [Riihimaa 1985]. At times, emission within the frequency boundaries of the N-event is very stable (Figure 3.4 A,B) and the upper and lower frequency edges of the emission remain nearly parallel. Sometimes the r Quasi-continuous emission within the N-event undulates rapidly in frequency. Interactions between N-events and wide frequency range S-bursts produce complex burst shapes and structures. While the burst character within an N event can be stable and unchanging over periods of tens of minutes it is also observed to change in character, switching between continuous emission and a narrow bandwidth S-burst train on a time scale of tens of seconds. The four moderate resolution AORS plates (3.21-3.24) show this type of N-event behavior near 30 Mhz..."

See also:

Riijimaa 1985 (Aarne Karjalainen Observatory, Oulu, Finland):
"Bursts of type N in Jupiter's decametric radio spectra"
http://adsabs.harvard.edu/abs/1985EM%26P...32....9R

Oya with 3 co authors 2002:
"Analyses Of Jovian Decametric Radiation S-Bursts Interacting With N-Bursts"
http://adsabs.harvard.edu/abs/2002EM%26P...88..187O