Permanent GPS Stations - Equipment Enclosures

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Above ground Enclosures

Above ground enclosures include a power enclosure and an equipment enclosure. In a standard solar powered configuration, the power enclosure usually contains the charge controller and the batteries. Wiring for the solar panels are run into the power enclosure via conduit and water proof connectors. The equipment enclosure can house the GPS receiver and any ancillary telecommunications equipment such as modems or radios. Conduit is run between the boxes in order to protect the wiring from water, rodents, and human interference. Typically, the lightning protection is attached to the equipment enclosure, and is grounded via copper wire attached to the grounding rod.

Below Ground Enclosures

A typical below ground enclosure setup (illustrated below) was developed for security of permanent sites. In this configuration, the power enclosure and the instrument enclosure are buried underground with air exchange provided by vent tubes. Air exchange can be essential for cooling equipment and evacuating lead acid battery offgasing. Each box has an intake and an exhaust vent; the intake air is introduced at the bottom of one side of the enclosure and the exhaust is drawn from the opposite top side of the enclosure to promote convection within the enclosure. A fan is used on the intake air inlet to draw air into the enclosure.

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Last modified Thursday, 17-Nov-2005 03:57:00 UTC