1960
DOI: 10.1109/ire-i.1960.5006907
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Time and Frequency Synchronization of Navy VLF Transmissions

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Cited by 9 publications
(2 citation statements)
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“…Shortterm VLF frequency measurements of NPM (19.8 kHz), Hawaii, were made [30] at Boulder, Colo., with precisions ranging from 2.5 x 10-' ' (24-hour observing time) to 3.1 x (8-day observing time). Time signals on VLF transmissions of NBA (18 kHz) using a pulse technique provided a received precision [31] of about one-half millisecond in Washington, D. C. The limiting factor is the low signal-to-noise ratio as set in the wideband receiver required for reproducing the pulse.…”
Section: B Distribution By Lf Transmissions (30 To 300 Khz)mentioning
confidence: 99%
“…Shortterm VLF frequency measurements of NPM (19.8 kHz), Hawaii, were made [30] at Boulder, Colo., with precisions ranging from 2.5 x 10-' ' (24-hour observing time) to 3.1 x (8-day observing time). Time signals on VLF transmissions of NBA (18 kHz) using a pulse technique provided a received precision [31] of about one-half millisecond in Washington, D. C. The limiting factor is the low signal-to-noise ratio as set in the wideband receiver required for reproducing the pulse.…”
Section: B Distribution By Lf Transmissions (30 To 300 Khz)mentioning
confidence: 99%
“…There is a wide variety of continuously operating transmitters both in the VLF and the LF bands that can be employed for the purposes of this study. They can be mainly classified as either navigation military transmitters for Army, Navy and Air-force uses, usually operating in the VLFband [77] or the civilian/commercial LF transmitters. In general, the VLF transmissions are more immune to other sources of disturbances, whereas these transmitters, due to the nature of their operators (military), are less prone to outages or changes in their transmission characteristics.…”
Section: Setupmentioning
confidence: 99%