TERRESTRIAL EFFECTS OF SOLAR ACTIVITY 



cant solar events. Basic research 

 on the physics of events is re- 

 quired to get away from the 

 admitted limitations of statisti- 

 cal techniques. 



2. Ionospheric forecasting and 

 specification techniques, espe- 

 cially in the area of short-term 

 frequency management. The 

 problem is especially acute dur- 

 ing magneto-ionospheric storms 

 and within polar latitudes. 



3. Modeling of high-altitude at- 

 mospheric density that is dy- 



namic — i.e., which reflects 

 hour-to-hour and day-to-day 

 variations. 



4. Better and more complete ob- 

 servations of solar and geo- 

 physical phenomena and tech- 

 niques and hardware to process, 

 format, and transmit data with 

 minimal delay. 



5. Operationally useful work on 

 the propagation conditions of 

 energetic particles between the 

 sun and the earth. 



Techniques to forecast geomag- 

 netic disturbances accurately. 

 The level of disturbance of the 

 geomagnetic field must be re- 

 lated to operationally signifi- 

 cant applications such as the 

 ionosphere and high-altitude 

 neutral density. 



Finally, the researcher should 

 not be satisfied with research 

 alone. He must push his ad- 

 vances into the realm of "de- 

 velopment" and their applica- 

 tion to the many activities of 

 mankind. 



17 



