Apollo Saturn Manual do Utilizador descarregar pdf (Página 21)

GROUND SUPPORT EOUIPMENT

A computer controlled automatic checkout system is used to accomplish

checkout or testJn] of the launch vehicle when in the Vertical Assembly

Building (VAB) highbay and on the launch pad.

An RCA IIOA Computer and other equipment necessary for service and check

out are installed with the vehicle on the mobile launcher. Simi]ar equipment,

Joined by an integration system (relay network), a facilities cable tunnel and

video cables for visual display are located in the Launch Control Center (LCC).

A Digital Data Acquisition System (DDAS) collects vehicle and support

equipment responses to test commands and formulates test data for transmission,

deco_mutation, and display to the LCC or ML.

Digital Events Evaluators (DEE) monitor the status of input lines and

generate a time labeled printout for each detected change in input status.

High speed printers in the LCC are connected to each DEE to provide a means

for real time or post-test evaluation of discrete data.

The propellant tanking computer system (PTCS) determines and controls the

quantities of fuel and oxidizer on board each stage. Optimum propellant levels

are maintained and LOX and LH 2 are replenished as boiloff occurs during the

countdown. The propellant tanking operation is monitored on the PTCS control

panel.

: Final countdown begins at T-I02 hours. A countdown clock, located in the

LCC, officially records this countdown.

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Apollo Saturn Manual do Utilizador Página 21