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Table of Contents
Multi-Filter Rotating Shadowband Radiometer
Mentor: K. Ebell
Principle
The Multifilter Rotating Shadowband Radiometer (MFRSR) is a passive instrument that measures global and diffuse components of solar irradiance at one broadband channel and at six narrowband channels, i. e. at 415, 500, 615, 673, 870, and 940 nm. Direct irradiance is subsequently calculated from the diffuse and global measured components. Each MFRSR measurement sequence includes measurements at four different shadowband positions: 1) at nadir (home position), 2) at the first side-band position, 3) sun-blocked, 4) at the second side-band position. The side-band measurements are used to correct for the portion of the sky obscured by the shadowband. From the MFRSR measurements, one may infer the atmosphere's aerosol optical depth at each wavelength. In turn, these optical depths may be used to derive information about the column abundances of ozone and water vapor (Michalsky et al. 1995), as well as aerosol (Harrison and Michalsky 1994) and other atmospheric constituents.
Instrument
YES Inc. MFR-7 at Forschungszentrum Jülich on the roof of the IEK-8 (Institut für Energie- und Klimaforschung: Troposphäre).
Data
- If you are interested in receiving data please contact the instrument mentors: K. Ebell
History
Period | Place | Project |
---|---|---|
06/07/2015 - today | Research Center Jülich, Germany | JOYCE |
Specifications
Parameter | Specification |
---|---|
Wavelengths | Silicon broadband pyranometer, 415, 500, 615, 673, 870, 940 nm |
FWHM bandwidth | 10 nm |
Cosine response | Better than 5% for 0 - 80° zenith angle; better than 1% with corrections |
Temporal Resolution | 15 s |
Weight | 4.55 kg |
Power Consumption | 110/220 VAC, 50/60 Hz (50 watts maximum) |
Manufacturer | YES Inc. |