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W

Helliwell, RA, Katsufrakis J P, Trimpi M L. 1973. Whistler-Induced Amplitude Perturbation in VLF Propagation. Journal of Geophysical Research. 78:4679-4688.

Inan, US, Chang H C, Helliwell RA, Katsufrakis J P, Imhof W L. 1985. Wave-induced precipitation as a loss process for radiation belt particles. Advances in Space Research. 5:243-245.

Doolittle, J H, Armstrong W C, Katsufrakis J P, Carpenter DL. 1978. Wave-induced particle precipitation effects at Siple Station. XIII. 4:204.

V

Katsufrakis, J P. 1981. VLF transmissions from Siple Station. Antarctic Journal. XVI:213.

Helliwell, RA, Katsufrakis J P, Bell TF, Raghuram R. 1975. VLF line radiation in the earth's magnetosphere and its association with power system radiation. Journal of Geophysical Research. 80:4249-4258.

S

Inan, US, Carpenter DL, Helliwell RA, Katsufrakis J P. 1985. Subionospheric VLF/LF phase perturbations produced by lightning-whistler induced particle precipitation. Journal of Geophysical Research. 90:7457-7469.

R

Imhof, W L, Gaines E E, Voss H D, Reagan J B, Datlowe D W, Mobilia J, Helliwell RA, Inan US, Katsufrakis J P, Joiner R G. 1985. Results from the SEEP active space plasma experiment - Effects onthe ionosphere. Radio Science. 20:511-518.

Helliwell, RA, Inan US, Katsufrakis J P, Carpenter DL, Paschal EW. 1985. Recent research on magnetospheric wave-particle interactions. National Institute Polar Research Memoirs. 38:83-98.

Q

Raghuram, R, Bell TF, Helliwell RA, Katsufrakis J P. 1977. A quiet band produced by VLF transmitter signals in the magnetosphere. Geophysical Research Letters. 4:199-202.

P

Carpenter, DL, Inan US, Trimpi M L, Helliwell RA, Katsufrakis J P. 1984. Perturbations of subionspheric LF and MF signals due to whistler-induced electron precipitation bursts. Journal of Geophysical Research. 89(A11):9857-9862.

O

Katsufrakis, J P, Helliwell RA, James G. 1980. Observations of Siple transmitter signals on the ISIS satellites. Antarctic Journal . XV(5):212-213.

N

Carpenter, DL, Katsufrakis J P. 1981. New upper atmosphere program at South Pole Station,. Antarctic Journal . XVI:220.

Bell, TF, Katsufrakis J P, James H G. 1985. A new type of VLF emission triggered at low altitude in the subauroral region by Siple Station VLF transmitter signals. Journal of Geophysical Research. 90:12183.

Katsufrakis, J P. 1964. Natural Electromagnetic phenomena Below 30 kc/s. Plenum press. :261-286.

M

Imhof, W L, Reagan J B, Voss H D, Gaines E E, Datlowe D W, Mobilia J, Helliwell RA, Inan US, Katsufrakis J P, Joiner R G. 1983. The modulated precipitation of radiation belt electrons by controlled signals from VLF transmitters. Geophysical Research Letters. 10:615-618.

Helliwell, RA. 1977. Modification of the propagation characteristics of the ionosphere (and the magnetosphere) by injection into the magnetosphere of whistler-mode waves. AGARD Artificial Modification of Propagation Media 8 p (SEE N77-19530 10-42).

Carpenter, G B, Katsufrakis J P, Kimura I. 1966. Midlatitude Observations of Nighttime VLF Signal-Amplitude Anomalies Associated with Magnetic Bays. Journal of Geophysical Research. 71:1928.

L

Smith, R L, Kimura I, Vigneron J, Katsufrakis J P. 1966. Lower Hybrid Resonance Noise and a New Ionospheric Duct. Journal of Geophysical Research. 71:1925.

Voss, H D, Imhof W L, Walt M, Mobilia J, Gaines E E, Reagan J B, Inan US, Helliwell RA, Carpenter DL, Katsufrakis J P. 1984. Lightning-induced electron precipitation. Nature. 312:740-742.

J

Kimura, I, Matsumoto H, Hashimoto K, Mukai T, Helliwell RA, Bell TF, Inan US, Katsufrakis J P. 1981. Jikiken /EXOS-B/ observation of Siple transmissions. Advances in Space Research. 1:197-202.

I

Smith, R L, Brice NM, Katsufrakis J P. 1964. An Ion Gyrofrequency Phenomenon observed in Satellites. Nature. 204:274-275.

G

Helliwell, RA, Carpenter DL, Inan US, Katsufrakis J P. 1986. Generation of band-limited VLF noise using the Siple transmitter - A model for magnetospheric hiss. Journal of Geophysical Research. 91:4381-4392.

E

Kimura, I, Hashimoto K, Matsumoto H, Mukai T, Bell TF, Inan US, Helliwell RA, Katsufrakis J P. 1983. EXOS-B/Siple station VLF wave-particle interaction experiments. I- General description and wave-particle correlations. Journal of Geophysical Research. 88:282-294.

Rosenberg, TJ, Helliwell RA, Katsufrakis J P. 1971. Electron Precipitation Associated with Discrete Very-Low-Frequency Emissions. Journal of Geophysical Research. 76:8445-8452.

Raghuram, R, Bell TF, Helliwell RA, Katsufrakis J P. 1977. Echo-induced suppression of coherent VLF transmitter signals in the magnetosphere. Journal of Geophysical Research. 82:2787-2796.