Computer Science – Sound
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..24.1065p&link_type=abstract
Advances in Space Research, Volume 24, Issue 8, p. 1065-1068.
Computer Science
Sound
Scientific paper
The OEDIPUS-C rocket payload included a bistatic tethered HF instrument transmitter-receiver pair HEX-REX (High Frequency Exciter - Receiver for Exciter) which acted as a topside sounder. The relatively low altitudes through which OEDIPUS C carried out topside sounding make the resulting ionograms a novel data set. Ionospheric reflections of the 10-W HEX transmissions were detected at payload heights between 780 and 160 km on the down leg. Near apogee at 824 km, extremely low in-situ densities (~100 cm-3) were observed. The monotonic rise of density from apogee to re-entry clearly showed that there was no ionospheric F layer. The ionospheric echoes came from altitudes near the payload down to ~100 km. Ground-reflection traces were often seen at frequencies below both fOE and fxE. OEDIPUS C provided a close-hand view of a thick but porous auroral E layer sounded at small ranges
James Gordon H.
Knudsen David J.
Prikryl Paul
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