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BELL SYSTEM TECHNICAL JOURNAL 



advised of conditions likely to be encountered. Consequently, the air- 

 way keepers and Weather Bureau observers at the various teletype- 

 writer stations make local observations of general weather conditions, 

 ceiling height, visibility, wind direction and velocity, temperature, 

 and barometric pressure, every hour. These data are then sent by 

 teletypewriter and automatically recorded at all points in accordance 

 with a predetermined schedule, which is coordinated with the broadcast 

 schedule of radio stations. Since pilots will tune in on particular 

 stations at definite times to obtain reports in accordance with the 

 broadcast schedule, it is important that the schedules be closely 

 adhered to. The following is an illustration of scheduled weather 

 reporting along the Newark-Cleveland route. 



At 42 minutes past the hour the observers will begin typing their 

 observations on the circuit beginning with the Newark station, followed 

 successively by Hadley, Allentown, Park Place, Numidia, Sunbury, 

 Winkleblech, Bellefonte, Kylertown, Greenwood Club, Brookville, 

 Mercer, Parkman and Cleveland, with practically no interval between 

 the completion of the report from one station and the beginning of a 

 report from the next. When the Cleveland weather observer has 

 completed typing his report a complete record of weather conditions 

 at all points on the circuit will appear on the teletypewriter tape at 

 each individual station and in the radio broadcasting stations located 

 at Hadley, Bellefonte and Cleveland. Fig. 2 shows a portion of an 



NK CV 0642ES 



NK OVC LWR BRKN CLDS OCNL SPRKG ETD 6 HND 2 1/2 NE 8 42 40 3010 



HW OVC LWR BRKN CLDS SPRKG HAZY 1 THSD 3 NE 5 42 3006 



AL OVC LT RAIN LT FOG ETD 6 HND 2 E 10 41 3006 



PL DENSE FOG LT RAIN ZERO ZERO ESE 15 37 3006 



NU OVC LT RAIN HAZY ETD 1 THSD 3 E 12 41 



SV OVC LT RAIN LT FOG ETD 12 HND 1 NE 9 43 



WK DENSE FOG LT RAIN ZERO ZERO E 18 37 3004 



BF OVC LT RAIN 8 HND 6 NE 6 43 43 2998 



I 



Fig. 2 — Teletypewriter tape with portion of weather sequence report. 



actual tape record of an hourly report along the Newark-Cleveland 

 route which includes the stations between Newark and Bellefonte, Pa. 

 For convenience the tape has been cut to show one station report on 



