1. Glenn Research Center at Lewis Field 1 RTD Temperature Calculation from HOBO Data Where: V IN = 2.48-2.5 V (HOBO ) V MEAS = “Flight Data” R DIVIDER = 1000  or 820  RTD 0° C REF = 1000   EMPCO RTD = 3.916  C R HOBO = 12000  RTD = Resistance Temperature Detector with linear change in resistance vs temperature R DIVIDER

2. Glenn Research Center at Lewis Field 2 RTD Temperature Data

3. Glenn Research Center at Lewis Field 3 Weather Balloon Data Detroit White Lake Observatory Data National Weather Service Balloon

4. Glenn Research Center at Lewis Field 4 UP DOWN

5. Glenn Research Center at Lewis Field 5 Pressure Calculation from HOBO Data 1.0 atm =29.92 in. Hg 760 mm Hg 760 Torr 1013.25 mb 14.7 psi 101.325 Kpa Where: V MEAS = “Flight Data” R DIVIDER = 1200  R HOBO = 12000  Pressure decreases with increasing altitude and altitude can be determined from pressure readings

6. Glenn Research Center at Lewis Field 6 Pressure Data 28000 24000 20000 16000 12000 8000 4000 0 Altitude (meters)

7. Glenn Research Center at Lewis Field 7 Radiometer Calculation from HOBO Data Amplifier: gain of 23 Radiometers measure Light Intensity or Energy, as altitude increases so does intensity. The atmosphere absorbs/reflects the sun’s energy.

8. Glenn Research Center at Lewis Field 8 135.3 92.0 Light Energy in space is ~136.8 mW/cm 2 Radiometer Data Scatter in the data is caused by the pointing on/off sun (spinning payload)