Longitude
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					- ETS 300 401 TELECOMMUNICATION February 1995 STANDARD
 - Curriculum Coherence – Year 3 Geography Term 3 All Around the World Prior Learning/Starting Points: PUPILS Will Know What a Settlement Is
 - Latitude and Longitude History
 - Global Positioning System: the Role of Atomic Clocks
 - Time Signal Stations of the World
 - STR-100 Instruction Bulletin
 - Time Balls and Time Signals
 - STANDARD FREQUENCY and TIME SIGNAL STATIONS on LF and HF Originally Published Between October 1997 and July 1998
 - Detection of Ionospheric Perturbations Associated with Japanese Earthquakes on the Basis of Reception of LF Transmitter Signals on the Satellite DEMETER
 - 1 Htdp User's Guide
 - WWV, WWVH, and WWVB
 - Evolution of the Marine Chronometer
 - Japan Standard Time Group
 - Epi Info™ 7 User Guide – Chapter 6 – Mobile
 - Time and Frequency Users Manual
 - Report Writing Manual
 - Determining Longitude: a Brief History
 - NIST Time and Frequency Radio Stations: WWV, WWVH, and WWVB