System Study of Coal Mine Communications.
NTIS: PB/237-218 Available for Reference At Bureau Libraries :30 pages
This research (Contract No. S0122076) involved a three-phase program to establish a data base, perform communication system analysis and optimization, and prepare equipment specifications to be included in this report. Communication system requirements and constraints were determined along with a survey of current and potential mine communication equipment. An investigation was completed concerning theoretical low frequency and very low frequency propagation characteristics, and ultra-high frequency propagation tests were conducted in a working coal mine.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/237-218; Available for Reference At Bureau Libraries
Collins Radio Company