AEROGRAPHER'S MATE 3 & 2 



CABINET, ELECTRICAL 

 EQUIPMENT, CY-2231/SMQ 



RECEIVER, RADIO 

 R-832/SM0-1 



RECORDER 



WEATHER DATA, 



R0-7I/SM0-1 



POWER SUPPLY, 

 PP-I8I2/SM0-1 



Figure 9-3. — Radiosonde Receptor 

 M )• 



209.150 



AN/SMQ- 



with which a computer can process and produce 

 weather information is of little value if the 

 product cannot reach the user on a real-time 

 basis. This requires equipment that can receive 

 and transmit data at a high rate of speed. 

 This equipment and the system :utilizing this 

 equipment are discussed in the following para- 

 graphs. 



NAVAL ENVIRONMENTAL 

 DATA NETWORK (NEDN) 



The Naval Environmental Data Network 

 (NEDN) is the primary computerized network for 

 disseminating meteorological and oceanographic 

 products of the Naval Weather Service. The 

 system consist of all the Naval Weather Service 

 computers linked together via high speed tele- 

 phone circuits. The network extends to each of 

 the four FLEWEACENs — Guam, Pearl Harbor, 

 Norfolk, and Rota, and to FLEWEAFAC Suitland, 

 FLENUMWEACEN Monterey, CA, with the great- 

 est computer power, is the hub of this network 

 and generates all the basic computer environ- 

 mental analyses and forecasts distributed via 

 the NEDN. 



There are two circuits in CONUS called 

 Tielines. These circuits parallel each coast, 

 with the East Coast Tieline being operated by 

 FLEWEACEN Norfolk, and the West Coast Tieline 

 by FLENUMWEACEN Monterey. These tielines 

 connect stations with their respective monitor 

 stations as indicated in figure 9-4. Most of the 

 raw data observations used by FLENUMWEACEN 

 Monterey are received from the Automated 

 Weather Network (AWN), which is the Air Force 

 counterpart of the NEDN, via high speed cir- 

 cuits. 



Major changes are occuring in computer 

 equipment and therefore will not be discussed 

 in great detail. The Naval Environmental Dis- 

 play Station (NEDS) is being introduced at NEDN 

 and tieline activities. The introduction of 

 NEDS-1, and others in the family of NEDS 

 equipment, is leading to the removal of current 

 Automatic Data Processing (ADP) equipment 

 at the FLEWEACENs, and the elimination of 

 the requirement for the Tieline as it now exists. 



Collect and Transmit (CAT) Unit 



The CAT unit is an electronic interface be- 

 tween high speed data transmission lines and 

 a standard teletype. All stations on the tieline 

 are issued a CAT unit such as that shown 

 in figure 9-5. 



The system is composed of an electronic 

 controller, a miniature read/write magnetic tape 

 handler with selectable endless tape loop car- 

 tridges, teletype input/output relays, power sup- 

 plies, and a control panel. The tape cartridges 

 are available in 3-, 6-, 9-, 12-, and 15-minute 



160 



