In the fifth area, there are presently over 920 commercial TV broadcast stations and each is a potential user. The sixth area is poorly determined, but potentially is extremely large: NBS personnel estimate the total military navigation market to be ... existence, requirements for frequency equalization to about 1 x 10 11 will probably accompany it, existing at up to 2.000 sites by ... SURVEY 0F NBS SERVICES 4.1 The Past1 4.1.1 Developments up to 1923 In 1911 the development of radioanbsp;...
|Title||:||The national measurement system for time and frequency|
|Author||:||A. S. Risley, United States. National Bureau of Standards|