The 5m ObservaDOME

     Observa-DOMES are manufactured using advanced computer controlled cutting and fabrication equipment. The surface of the 5m dome is mill finish aluminum and 3003 H-14 alloy. The design is truly hemispherical, that is, circular in both plan and elevation and is capable of continuous clockwise or counter-clockwise rotation.

     The dome is constructed to survive wind velocities, including gusts to 200km/h with the shutters closed and in storage position. It is capable of normal operation with wind velocities of 48 km/h, including gusts from any direction with the shutters open. The domes are capable of normal operation in temperatures from -6° C to 46° C. The domes are fabricated so that they are not subject to solar detraction or corrosive detraction. Also, it is fabricated to incorporate adequate expansion joints to prevent thermal distortion and further are leak proof and watertight when subjected to rain as may be experienced in a tropical downpour.

Figure 1. Installed dome (LNO)

Figure 2. Engineering drawing of the 5m ObservaDOME (ObsDome)

Observa-DOME / Meridian Controls Computer Automation Specifications

     This computer automation system will allow complete operation of both the Observa-DOME azimuth drive, and dome shutter systems via computer control. It will be capable of interfacing with telescopes using software such as Software Bisque’s “The Sky”, or other compatible software.

     Two electronic controller panels will be provided: one dome mounted controller to provide shutter operation, and the second stationary Dome controller, mounted below the rotating dome, for azimuth drive control, shutter command, telescope, computer interface, and power input, etc.

Figure 3. Automation module mounted on rotating dome (ObservaDome)

Figure 4. Automation module mounted below rotating dome (ObservaDome)

     The Observa-DOME bi-parting shutters will be actuated using 12 VDC gear motor and chain assembly. Limit switches will be provided for both the open and close shutter positions. The shutter gear motor will be powered by sealed 48-amp/hr battery attached to the rotating dome. The battery will be charged by a 30-watt solar panel attached to the exterior of the dome. Command for the shutter controller will be made by an RF data link to the stationary Dome controller. The shutters will close in the event of a power failure at the dome controller.

     The computer automation package will allow normal Observa-DOME operation controlled locally, or via the Internet or LAN.