complex. The Command Control System is required to transmit frequency modulated command or destruct signals maneuverable re-entry vehicles. The antenna will be positioned automatically by data from the Synchro Bus or manually by the transmitter operator. 6.9 COMPUTER A digital computer, in addition to the AN/TPQ-18 Radar computer, is required for impact prediction, command control, conversion of trajectory information to orbital or ballistic parameters, acquisition computation, refraction corrections, and reduction of meteorological data. A computer which is modular in construction is desired, so that it can be tailored to meet specific system requirements and provides the capability for easy expansion. The RCA 4101 computer in the AN/TPC-18 Radar can edit and smooth the data, convert from geocentric coordinates to local polar coordinates and vice versa, and correct for the system errors. 6.10 METEOROLOGICAL FACILITY As previously mentioned in paragraph 6.2, a meteorological launch facility will be installed and the GMD-1B will be converted to a GMD-4 in FY 66, Assuming that these plans are completed, the required meteoro- logical measurements will be provided. 6.11 INTRA-SITE COMMUNICATIONS The Intra-site Communications will provide the distribution of data and operational voice communication between systems, as required. The distribution of the voice communication will be controlled at the Communication Center. A communication link must be provided from the -17-