bawe been on the same trajectory, as were the first four, but at adour 58,000
feet at burst time.
The remaining two were oa the Teak O6—egree trajectory,
One at apogee at burst tine, the other at 110,000 feet om the ascending portion of Elight.
Four high- and four low-frequency transmitters vere used.
The 2ca-ec transmitter was off at burst tine as a result of che probable failure of the second stage of the sissile to igzite.
There are some marginal in-
dications that one high-frequency transmitter was functioning at burst tine;
two failed before burst; one was not launched because of frequency duplication.
Good qualiry data vere obtained on three low-frequency transaitters the trajectories for which are shown in Fig. 7.10.
The recorded signal lewel was too low
to be cseful on the one high-frequency transmitter working at burse tine.
7.3 TABULATION OF Datla
Launching pad identification, launch azimuths, trajectory characteristics,
and transmitter frequencies are itemized in Tables 7.1 and 7.2.
launching pads and receiver stations are presented in Table 7.3.
Coordinates of
Yo enable
system gain calculations to be made, antennas arrays used at borh receiving sta-
tious on boch shots are shown in Figs. 7.1] ani 7.12.
Plots of signal strength
versus time of the various received frequencies are reproduced in Figs. 7.13
through 7.28.
Burst cise is noted on each curve in the series.
Figure 7.13 is a plot
of signal strength versus time received at Jobnston Island from a 224-ac transmitter missile fired during the Teak rehearsal.
Data recorded is typical of
the signal expected (with no ionization present) from a Deacon-érrow missile
flying the bigh-angle trajectory depicted in Fig. 7.10.
Superimposed oo the
actual signal received is a plot of the signal as it would be expected to vary
as a result of increasing path attenuation with distance alone.
Variations in phase of the received signals from the low-frequency traosmitters are shown in Pigs. 7.25 through 7.32.
Because of the greater resolu-
tion of the phase-seasurement circuitry, nicute observation of signal variations
pear receiver noise level can be made.
Low-frequency signal strength records are normalized to the curve of freeSpace stteacatisa versus distance and are compared in Figs. 7.33 chrough 7-25.
Ts
233