@article{oai:nipr.repo.nii.ac.jp:00001270,
 author = {Nakamura, Yoshiharu and Nomura, Yuzi},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Sep},
 note = {P(論文), Observation of noise in the frequency range from 0.6 to 7.6MHz has been made in an auroral plasma up to approximately 220km by an instrument (PWN-H) on board the S-310JA-7 sounding rocket. This rocket was launched at 1915 : 50 UT on March 27,1978 from Syowa Station in Antarctica, just prior to an intense auroral substorm (magnetic H component decrease=-700nT and 30MHz CNA=-5dB). The observed HF emissions are classified into three types according to their frequency ranges and spectral shape; 1) High level and narrow band signals whose frequencies are nearly equal to n(&fnof;)_<ce> or (n+1/2)(&fnof;)_<ce>, where n is an integer and (&fnof;)_<ce> is the electron gyrofrequency. 2) A low level broad band emission whose upper-limiting frequency is below the local electron plasma frequency. 3) Signals at frequencies below f_<ce>. Excitation mechanism of these waves in the aurora is discussed.},
 pages = {196--206},
 title = {Observation of HF noise in an intense aurora by the sounding rocket S-310JA-7},
 volume = {22},
 year = {1982}
}