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immnlbieay!) (TEWA)
Project 6.4 - Determination of Charecteristics of Airborne Flush Mounted
Antennas and Photo Tubes for Yield Determination at Extended
Ground-to-Air Ranges - A. J. Waters
OBJECTIVES
To determine the effectiveness of flush mounted airborne antennas and
phototubes at various ground-to-sir ranges in detecting characteristic low
frequency electromagnetic radiation and visible radiation, respectively.
To determine the temporal and amplitude characteristics of the low
frequency electromagnetic radiation at various ground-to-air ranges.
To determine the temporal and intensity characteristics of visible
radiation at various ground-—to~asir ranges.
To determine the effects of ambient conditions upon the satisfactory
measurement of the parameters specified in the first two items.
INSTRUMENTATION
2
1
1
2
fiducial antennas
whip antenna
synchronizer
photoheads
2 scope cameras
1 sequence camera
1 recorder
2 DuMont Scopes (1 a dual beam, 1 a single beam)
T=CHNIQUE
Signal is received by antenna fed through an emplifier and then to the
scope.
The signal is then photographed.
the recorder.
Photohead output is led directly to
The sequence camera photographs the blast directly for use in
correlation of previous data.
Distence wes approximately 92 miles.
RESULTS
Ah \
Trace was compressed
ato
so it was possible to see not only the beginning but the entire signal.
: a
wn
al
Signal was received and recorded from both antennas.
head data was obtained on both channels (photoheads),
on the whip antenna,
BnDirntnag
- 69 ~
Photo-
No signal was obteined
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