Radiation Balance Data Example

The following data were collected at the University of Nebraska-Lincoln, East Campus research fields on July 15, 1992 over a soybean canopy. The yellow bands in the following graphs represent photographs were taken of sky conditions and a downward looking (nadir) view of the canopy at various locations. Canopy and sky pictures where not taken at the same time but within a short period of each other.

Time (CDT)	Canopy Picture	Sky Picture
9:48 am		Not Available
10:20 am
11:26 am
12:38 pm
1:37 pm	Not Available

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PIR - Epply Pyrgeometer
 IRT - Everest Infrared Transducer

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Pyranometer - LI-COR (LI-200SA) Pyranometer
 PSP- Epply Precision Spectral Pyranometer
 Quantum - LI-COR (LI-190SA) Quantum sensor

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= Incoming Longwave Radiation{Eppley Pyrgeometer}
= Outgoing Longwave Radiation {Epply Pyrgeometer}
= Incoming Shortwave Radiation {Epply Precision Spectral Pyranometer}
= Outgoing Shortwave Radiation {Epply Precision Spectral Pyranometer}
 Rn = Net Radiation {REBS Model Q*6 net radiation sensor}

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All measurements except "TPAR Average: Measured" where made with LI-190SA Quantum Sensor (hemispherical point source).  The "TPAR Average: Measured" values were measured with a LI-191SA Line Quantum Sensor.

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Mounting Information

	Everest IRT Transducer at nadir & 45o.  The  45o IRT is pointed toward the north to minimize it's view of shadows Outgoing Epply PSP and PIR centered on support structure to reduce view of structure  REB net radiometer pointed toward south to reduce views of shadows from support structure
	Incoming Epply PSP and PIR
	Canopy growth as of July 15, 1992 Instrument approximately 1.5 meters above the soil surface.  Transmitted PAR quantum sensors in row structure in foreground of the picture.

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