ANSWERS TO REVIEW QUESTIONS

ANSWERS TO REVIEW QUESTIONS A 1. The troposphere and the stratosphere. A2. Pressure, temperature, relative humidity, and winds. A3. Upper-air soundings are used as primary input to upper-air computer forecast products, as well as for climatological and atmospheric research. They are also used extensively for local forecasting, A4. A radiosonde observation measures pressure, temperature, and relative humidity only, while a rawinsonde observation measures these parameters in addition to wind data. A5. Rawinsonde and Pibal observations. A6. A dropsonde observation. A7. Federal Meteorological Handbook No. 3 (FMH-3). A8. To determine wind vector information. A9. Helium and hydrogen. A10. 100-gram and 300-gram balloons. A11. The neck. A12. When the balloon has been stored in cold temperatures or is older than 1 year. A13. Between 900 to 1,000 feet per minute. A14. To reduce the pressure (flow rate) of a gas into the balloon in order to prevent damage to the balloon. A15. About 40 cubic feet. A16. Additional gas should be added to increase lift. A17. Never. A18. To protect and securely hold the balloon when launching in high wind conditions. A19. With an 18-volt battery. A20. The radiosonde frequency can be adjusted by using a small screwdriver to turn a tuning screw located on the outside of the radiosonde unit. A21. By displaying 5 asterisks (* * * * *) on the LCD. A22. The Officer of the Deck (OOD). 1-33