Multi-Address Digital Command System.

摘要

The Model 2A Multi-address Digital Command System can provide 95 commands for transmission to each of 10 addresses in a balloon-borne scientific payload. To prevent false-command activation, the balloon-borne decoder checks the station address, performs a double-scan parity check, and generates a reply code that is telemetered back to ground control for verification before the Execute command is issued. The system is operable with high frequency, very high frequency and ultrahigh frequency communications systems, both AM (amplitude modulation) and FM (frequency modulation). Since 1986 it has been flown routinely on Geophysics Laboratory scientific balloon payloads with error-free operation. Balloon-borne instrumentation; Digital command systems; Balloon command/control; Radio command systems. (jg)