i800,— 30° CLOUD ELEVATION ANGLE (@) 1700;- ALTITUDE (KILOMETERS) I600;- I500}— 1400/-— I300}— |200;lo° 1100 FWIND SPEED (MILES/HOUR) 1000 5000 3500 4000 | 4 500 5000 ' 6000 7000 WIND SPEED (KILOMETERS/HOUR) Fig, 5 -- Range of wind speed and altitude solutions 53-54