Sun Spot Two Instrument Descriptions and Histories


Model Measurement
Notes (below)
Units Install
Date
Removal
Date
Current
SN
Current
CF
LI-200 Global Horizontal W/m2 11/10/2010 - PY58689 CF = -10.96 W/m2/µA
FD = 1.0261
Measured using a LICOR LI-200 Pyranometer mounted on an Irradiance Inc. Rotating Shadowband Radiometer (RSR). RSR mounted on the ground and the LI-200 sensor height is approx. 7 feet above ground level. The uncorrected value is for testing and troubleshooting purposes only. Voltage is measured across a 100 Ohm precision resistor in parallel to sensor output.
LI-200 Diffuse Horizontal W/m2 11/10/2010 - - -
Measured using the above LI-200, when RSR band rotates every 30-seconds and blocks the sun. The uncorrected value is for testing and troubleshooting purposes only. Voltage is measured across a 100 Ohm precision resistor in parallel to sensor output.
(calc) Direct Normal W/m2 11/10/2010 - - FD = 1.0261
Calculated using Global and Diffuse measurement. The uncorrected value is for testing and troubleshooting purposes only.
LI-200 Global Horizontal (secondary) W/m2 11/10/2010 - PY63285 CF = -11.48 W/m2/µA
Measured using a LICOR LI-200 Pyranometer mounted next to the primary LI-200, but outside of the rotating shading band. Voltage is measured across a 100 Ohm precision resistor in parallel to sensor output.
CS215 Dry Bulb Temperature and Relative Humidity oC 11/10/2010 - - N/A
Outside air temperature and relative humidity inside in a naturally aspirated radiation shield mounted approx. 5 feet above ground level.
034B Wind Speed and Wind Direction m/s 11/10/2010 - - 0.799 m/s/Hz+0.2811m/s
712 o/mV+45o
Measured by a Met One 3-cup anemometer and vane mounted 10 meters above ground level on tower. Peak Wind Speed is also recorded, which is the maximum 3-sec anemometer reading during the 1-minute interval.
TE525 Precipitation Gauge (tipping bucket) mm 11/10/2010 - - 0.254 mm/count
The Texas Electronics TR525I tipping bucket precipitation gauge is mounted approx. 4 feet above ground level. The accumulated daily precipitation is also recorded.
CS106 Station Pressure mBar 11/10/2010 - - 0.24 mBar/mV+500mBar
The station pressure is measured by a Vaisala PTB110 sensor mounted inside weatherproof housing. This sensor is only measured every 15-minutes to conserve battery power.
(calc) Zenith Angle o 11/10/2010 - - -
Solar zenith angle calculated by RSR datalogger program.
(calc) Azimuth Angle o 11/10/2010 - - -
Solar azimuth angle calculated by RSR datalogger program.
(calc) Airmass - 11/10/2010 - - -
Airmass (optical) and airmass (pressure corrected) calculated by RSR datalogger program.
- RSR Battery Voltage V 11/10/2010 - - -
The RSR Battery powers the datalogger and the shadowband, it is charged by a PV panel.
- CR800 Temperature oC 11/10/2010 - - -
Temperature of CR800 datalogger panel. Logger is mounted inside weatherproof enclosure.
Notes:
  • Data Sample rate is every 3 second with 1-minute average output.
  • The CR800 is a table based operating system, data is converted from table to array format after datacollection, also any non-numeric values are converted to -99999.
  • The datalogger program runs using Greenwich Mean Time (GMT), data is converted to Mountain Standard Time (MST) after datacollection.
  • Prior to 11/10/2010, this measurement station was located at Sun Spot One, San Luis Valley, Colorado.

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