Global Positioning System — GPS redirects here. For other uses, see GPS (disambiguation). Geodesy Fundamentals … Wikipedia
Longitude — For Dava Sobel s book about John Harrison, see Longitude (book). For the adaptation of Sobel s book, see Longitude (TV series). Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are… … Wikipedia
Time from NPL — Map showing the location of the Anthorn VLF transmitter within Cumbria … Wikipedia
Time signal — These automatic signal clocks were synchronized by telegraphy in 1905 before the widespread use of radio A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day. Contents 1 Audible… … Wikipedia
DCF77 — Coordinates: 50°0′56″N 9°00′39″E / 50.01556°N 9.01083°E / 50.01556; 9.01083 … Wikipedia
OMA (time signal) — OMA was the callsign of a Czech time signal station. The station was operated by the Astronomical Institute of Prague and the transmitters were located at RKS Liblice 1. The station transmitted in the LF band on 50 kHz with a power of 7 kW and in … Wikipedia
Nauen Transmitter Station — Large adjustable antenna in Nauen, 2004 Nauen Transmitter Station (German: Grossfunkstelle Nauen or Sender Nauen) in Nauen, Havelland (Kreis), Brandenburg, Germany, is the oldest transmitting plant in the world. It was founded on 1 April 1906 by… … Wikipedia
Compass navigation system — For navigation with a magnetic compass, see compass. Comparison of GPS, GLONASS, Galileo and Compass (medium earth orbit) satellite navigation system orbits with the International Space Station, Hubble Space Telescope and Iridium constellat … Wikipedia
OLB5 — was the callsign of a Czech time signal radio station. The station was located at Poděbrady and transmitted time signals originated from the OMA clock at Liblice. The station transmitted in the HF band on 3170 kHz with 1 kW.[1]… … Wikipedia
Shortwave radio — Shortwave can also refer to a shortwave trough meteorology. A solid state, analog shortwave receiver Shortwave radio refers to the upper MF (medium frequency) and all of the HF (high frequency) portion of the radio spectrum, between… … Wikipedia
