Gemini 4 Experiment Debriefing, 1967

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M-913-65-04
batteries will be required, radial thrusting TCA's and burst diaphragms in the 11 811
package that were removed for GT-3 are both installed on GT-4, and will act
through the Spacecraft Centers of Gravity.
An HF antenna has been added to the
adapter section for orbital use and the
HF transciever there has been removed.
The C-band phase shifter now has its own inverter, the recovery flashing light
can now be turned off during dayIight hours, the HF antenna on the cabin section
has been redesigned, and the adapter $-band transponder in the adapter section has
been replaced with a C-band transponder which will have a different pulse spacing
from the one in the spacecraft.
In the GT-4 mission S/C, urine wi 11 be dumped
directly overboard from the urine bellows through a shut-off and selector valve, a
solenoid valve and a heated line.
Redundancy is provided by the capability to
dump urine through the launch cooling heat exchanger (water boiler}.
The main
chute disconnect cartridge has been changed from a 22-second time delay to a
zero second delay and new long-life attitude thrusters have been installed.
EXPERIMENTS
The 13 experiments are depicted and described on the following pages:
1. D-1, Basic Object Photography
In conducting this experiment, the as­
tronauts will employ elaborate photo­
optical equipment to investigate the
technical problems associated with
observing, evaluating, and photo­
graphing objects in space.
These
objects include the 2nd stage of
the launch vehicle and natural
celestial bodies such as the moon.
Data from this experiment will be
used to evaluate the astronauts'
ability to view and track objects,
and to maintain object-camera
orientation by maneuvering the
spacecraft. Equipment which wi 11
be used is illustrated in Figure 3.
D-1 BASIC OBJECT
PHOTOGRAPHY
FIG. 3
5/24/65
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