First observations of stimulated electromagnetic emission at Arecibo

Journal Article · Mon May 01 04:00:00 EDT 1989 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/GL016i005p00369· OSTI ID:5837342

Thide, B; Hedberg, A ^[1]; Fejer, J A; Sulzer, M P ^[2]

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1. Swedish Institute of Space Physics, Uppsala (Sweden)
2. Arecibo Observatory (Puerto Rico)

The first observations of HF heater stimulated electromagnetic emissions induced in the low-latitude ionospheric plasma above Arecibo, Puerto Rico, are reported. Many systematic spectral features of the emissions bear a close resemblance to those observed in ionospheric modification experiments in the auroral zone and scale in accordance with detailed theory. This proves that these sideband emissions are not dependent on specific geophysical conditions but are due to fundamental interaction processes in the ionospheric plasma. The authors also report the discovery of unique, short-lived HF sideband emissions that are less systematic than those observed previously and accompanied by a quenching of the HF enhanced plasma and ion lines in the Arecibo 430 MHz incoherent scatter radar spectra.

• OSTI ID: 5837342
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Journal Name: Geophysical Research Letters (American Geophysical Union); (USA) Vol. 16:5; ISSN 0094-8276; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AURORAL ZONES
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
EMISSION
ENERGY-LEVEL TRANSITIONS
HEATING
INTERACTIONS
IONOSPHERE
MEASURING INSTRUMENTS
MODIFICATIONS
PLANETARY IONOSPHERES
PLASMA
PLASMA WAVES
RADAR
RADIATIONS
RADIOWAVE RADIATION
RANGE FINDERS
STIMULATED EMISSION