Page:United States Statutes at Large Volume 63 Part 2.djvu/676

 i;:;S.'r I MI'LTILATERAI-TELEC'MMl'NICATiNS-(OCT. 2. 1947 (App. 1 RR) Notes a) Indicate only the symbols such as Al, F2, etc. (see article 2). Additional information regarding the emissions should be furnished under items 17 or 20. b) Only ih degrees and minutes, except for radionavigation land stations for which the position should be given in degrees, minutes, and seconds. c) State whether the antenna exists or is projected. d) The angular width of the main lobe in the horizontal plane is that total angle, in degrees, within which the radiated power in any direction is not more than 6 db less than the power radiated in the direction of maximum radiation. e) Gain to be calculated with reference to a theoretical free space half-wave dipole (see article 1). I) Reference should be made to appendix 7. g) When more than one locality is served list all localities; giving the location of the control point or points in all cases. h) The maximum hours of use of the frequency shall be taken to mean the earliest and latest hours of use of this frequency for a complete day during all schedules for a complete sunspot cycle. For example: if during one period the schedule would be 1000 to 1500 hours (G.M .T.) and for another period of 1100 to 1600 hours (G.M.T .), the information to be shown will be 1000 to 1600 hours (G.M .T.) . i) In the case of forked fixed circuits the distance to each locality should be shown. In the case of fixed networks, the maximum distance between any two stations should be shown. In the case of emissions intended to serve a large geo- graphical region the distance to the approximate centre 1973

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