RTD Temperature Calculation from HOBO Data

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RTD Temperature Calculation from HOBO Data
RTD Resistance Temperature Detector with
linear change in resistance vs temperature
Where VIN 2.48-2.5 V (HOBO ) VMEAS Flight
Data RDIVIDER 1000 W or 820 W RTD0 C REF
1000 W TEMPCORTD 3.916 W/C RHOBO 12000 W
RDIVIDER
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RTD Temperature Data
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Weather Balloon Data
Detroit White Lake Observatory Data National
Weather Service Balloon
4
DOWN
UP
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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
Pressure decreases with increasing altitude and
altitude can be determined from pressure readings
Where VMEAS Flight Data RDIVIDER 1200
W RHOBO 12000 W
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Pressure Data
28000
24000
20000
Altitude (meters)
16000
12000
8000
4000
0
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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 suns energy.
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Radiometer Data
Light Energy in space is 136.8 mW/cm2
135.3
Scatter in the data is caused by the pointing
on/off sun (spinning payload)
92.0