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Mercury tracking stations. Though the MCC provided command and control, it was not the only facility involved in supporting Mercury or Gemini flights. The Computing and Communications Center was located at the Goddard Space Flight Center in Greenbelt, Maryland and provided computing power for missions.
A Single-Pole, Single-Throw (SPST) mercury switch on millimetre graph paper, device length approximately 1.5 cm Another mercury switch design. A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit. There are several different basic ...
The mercury relay thus allows for switching of higher currents with a small control current, for a large number of cycles. They are often installed into automatic controllers that required extended periods of unattended continuous switching operation. The mercury surface is self-restoring after an arc, and the contact resistance is low and ...
Another style of mercury light switch uses a metal wheel with an insulator separating the two halves that has a hole which allows the mercury to connect either side of the wheel in only one position. [12] Some of these switches were also equipped with a neon lamp connected across the contacts, and thus in series with the electrical load. This ...
White Flight Control Room prior to STS-114 in 2005 Exterior of the Mission Control building Emblem for NASA's Flight Operations Directorate (FOD). NASA's Christopher C. Kraft Jr. Mission Control Center (MCC-H, initially called Integrated Mission Control Center, or IMCC), also known by its radio callsign, Houston, is the facility at the Lyndon B. Johnson Space Center in Houston, Texas, that ...
A mercury-wetted reed relay is a form of reed relay that employs a mercury switch, in which the contacts are wetted with mercury. Mercury reduces the contact resistance and mitigates the associated voltage drop. Surface contamination may result in poor conductivity for low-current signals.
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