Xcel Energy Comanche Station Instrument Descriptions and Histories
Model | Measurement Notes (below) |
Units | Install Date |
Removal Date |
Current SN |
Current CF |
---|---|---|---|---|---|---|
LI-200 | Global Horizontal | W/m2 | 06/20/2007 | - | PY55712 | 9.62 W/m2/mV |
Measured using a LICOR LI-200 Pyranometer mounted on an Irradiance Inc. Rotating Shadowband Radiometer (RSR). RSR mounted on the roof of a 10 foot tall building; LI-200 sensor height is approx. 13 feet above ground level. | ||||||
LI-200 | Diffuse Horizontal | W/m2 | 06/20/2007 | - | PY55712 | 9.62 W/m2/mV |
Measured using the above LI-200, when RSR band rotates every 30-seconds and blocks the sun. | ||||||
(calc) | Direct Normal | W/m2 | 06/20/2007 | - | - | FD = 1.0 |
Calculated using Global and Diffuse measurement. | ||||||
CS215 | Dry Bulb Temperature and Relative Humidity | oC | 06/20/2007 | - | - | N/A |
Outside air temperature and relative humidity inside in a naturally aspirated radiation shield mounted approx. 12 feet above ground level on roof. | ||||||
03001 | Wind Speed and Wind Direction | m/s | 06/20/2007 | - | - | 0.75 m/s/Hz+0.2m/s 355 o/mV |
Measured by an RM Young 3-cup anemometer and vane is mounted 10 meters above ground level on tower. Peak Wind Speed is also recorded, which is the maximum 5-sec anemometer reading during the 1-minute interval. | ||||||
TB4 | Precipitation Gauge (tipping bucket) | mm | 06/20/2007 | - | - | 0.254 mm/count |
The Hydrological Services TES525 tipping bucket precipitation gauge is mounted approx. 11 feet above ground level on the roof. The accumulated daily precipitation is also recorded. | ||||||
(calc) | Est. Pressure | mBar | 06/20/2007 | - | - | - |
The station pressure is calculated by the RSR datalogger program. This estimation is based on the site elevation and air temperature. | ||||||
(calc) | Zenith Angle | o | 06/20/2007 | - | - | - |
Solar zenith angle calculated by RSR datalogger program. | ||||||
(calc) | Azimuth Angle | o | 06/20/2007 | - | - | - |
Solar azimuth angle calculated by RSR datalogger program. | ||||||
(calc) | Airmass | - | 06/20/2007 | - | - | - |
Airmass (optical) and airmass (pressure corrected) calculated by RSR datalogger program. | ||||||
- | RSR Battery Voltage | V | 06/20/2007 | - | - | - |
The RSR Battery powers the datalogger and the shadowband, it is charged by a PV panel. | ||||||
- | CR1000 Temperature | oC | 06/20/2007 | - | - | - |
Temperature of CR1000 datalogger panel. | ||||||
(calc) | Direct Normal (Bird Estimated) | W/m2 | 07/24/2007 | - | - | - |
Estimated Direct Normal using the Bird Clear Sky Model | ||||||
Notes:
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