the l-secomi tining auras.
The 0.1 cycle-per-secood output froa the third
TOO decade scaler drives a fourth TOA decade scaler and an amplifyiag peaseinverting atage that triggers a aonostable aultivibraterset to give 2a 0.=second, positive-going voltage output.
This output defiects Ure sice-mircer
peos for 0.4 second every Centh time aark.
Siailarly, tre 0.0l-cps output
of the fourth decade scaler drives a phase-inverting aaplifier stase chit
triggers 2 aultivibrator, the output from which deflects the side-marker pens
for 0.8 second every one hundred l-second time mark.
The elecercnically regulated power supply is capable of supplying -275
voles ac 16) milliamperes with =] percent regulation for AC line variations
of 105 to 130 volts.
6.2.2
Operations
Microbarograph stations were located on Johnston Island, French Frigate
Shoals, and Oahu, Hawaii, at positions shown in Table 6.9.
is explained in Fig. 6.9.
The notation used
The sensing heads at each aicrobarograph station
were placed about 1 mile apart in order to separate signals, since difference
in arrival tises at the two beads was necessary for coaplete data reduction
and signal cooparisop.
The relative pusitions of these stations and Teak CZ
are show on the sap in Fig. 6.10.
Since no experience existed on which to base predictions or pressure from
the very-bigh-alritude burst of Teak, the sensitivity range at each station
could not be predicted accurately, and thus ranges could not be fixed before
the shot.
However, since it was known thar the signal would be received at
Jobnston Island well before it would be received at the other stations, a
procedure was established for resetting ranges on advice froma Johnston.
La
order to avoid rebalancing moore than one asplifier, the two amplifiers at
°
each outlying staticn began operations on different range settings established
by predictions as accurate as could be made.
One or the other of the settings —
was to be changed, as described in the procedure below, in accordance with
radio instructions from Johnseton Island.
.
ALL BicfooarograpoO recorders uperated ul a pupes specu vl 2.5 vaacd
(aediua speed setting).
With this paper speed and the aaximus necessary
3
recording periods (H - 5 minutes to berseen H - 10 and H - 120 ainutes), each
FO