A satellite-controlled digital clock
J. V. Cateora, D. D. Davis, D. W. Hanson, Institute for Basic Standards (U.S.). Time and Frequency Division, United States. National Bureau of Standards
U.S. Dept. of Commerce, National Bureau of Standards, Institute for Basic Standards, Time and Frequency Division, 1976 - Clocks and watches - 41 pages
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1C JCN 22 FIM PI 23 SRC PI 8000 Hz transition ACCUMULATOR Boulder Bureau of Standards bytes CHARACTER IN RAM CODE SYNC code synchronization COUNT COUNTER DATA BIT DCPRS delay corrections digital clock DISPLAY BOARD Equipment delay F1 CLC F7 TCC four bits frame errors frequency Hexadecimal Hz data clock INC R3 INCREMENT index register input port interrogation channel interrogation message l00 Hz data l5 bits Longitude microprocessor modulation index multiplexed National Bureau path delay phase lock loop RAM clock Random Access Memory Read Only Memories RESET satellite position characters satellite position display satellite signal SECOND CHARACTER shift register shown in figure SMS/GOES satellites SMS2 stored STROBE subroutine technical Technology TENS OF MINUTES TENS OF SECOND THRU F time-of-year TOY CHARACTER UNIT MINUTE UNIT SECOND updated UTC(NBS WAITl00 Wallops Island WRITE XCH RC