Meteo Observations at IGMK

User Tools

Site Tools

Trace:
mfrsr

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
mfrsr [2020/08/30 19:54] – [Principle] bpospichmfrsr [2021/03/01 11:16] (current) – [Link to current observations] bpospich
Line 7: Line 7:
  
 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, the aerosol optical depth at the wavelengths 415, 500, 615, 673 and 870 nm as well as the Angstrom exponent can be derived. For single-layer “horizontally homogeneous” liquid clouds, layer cloud optical depth and effective radius can also be retrieved.  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, the aerosol optical depth at the wavelengths 415, 500, 615, 673 and 870 nm as well as the Angstrom exponent can be derived. For single-layer “horizontally homogeneous” liquid clouds, layer cloud optical depth and effective radius can also be retrieved. 
-===== Measurement modes ===== 
  
-  * Vertically pointing observations with integration times from 10 to 3600 seconds.   +
-  * The range resolution can be varied from 10 to 200 m which determines together with the 30 range gates the system's maximum height range of 300 to 6000 m. +
  
  
 ===== JOYCE-CF Standard Operation Procedures ===== ===== JOYCE-CF Standard Operation Procedures =====
  
-  * Temporal resolution 10 seconds +  * Direct, diffuse, and total irradiance in 5 spectral bands 
-  * Vertical resolution 35 meters (max. range = 1085 m)+  * Temporal resolution 15 seconds 
 + 
 + ===== Calibration and data quality control ===== 
 + 
 +  * Absolute calibration
  
-===== Calibrations and data quality assurance procedures ===== 
-  * ImProToo features a noise removal based on recognition of the most significant peak and a dynamic dealiasing routine which allows observations even if the Nyquist velocity range is exceeded.  
  
 ===== Data availability ===== ===== Data availability =====
Line 27: Line 27:
  
 ^ Dataset     ^ Temporal resolution       ^ File size          ^ Filename   ^ Remarks   ^  ^ Dataset     ^ Temporal resolution       ^ File size          ^ Filename   ^ Remarks   ^ 
-| Raw data (ASCII)   | 10 seconds    | 1 file per day (~15 MB)     | //YYYYMMDD_jue_mrr_raw_txt.gz//  | METEK format (zipped)   | +| Radiances   | 15 seconds    | 1 file per day (~1.5 MB)     | //DayYYYYMMDD.txt//  |    |
-| IMProToo (NetCDF)   | 1 minute    | 1 file per day (20-30 MB)     | //YYYYMMDD_jue_mrr_improtoo_0-101.nc.gz//  | [[https://github.com/maahn/IMProToo|IMProToo]] product (zipped) | +
- +
-Both available datasets include Doppler spectra, drop spectra, radar reflectivity, rain rate, and fall velocity.+
  
  
Line 36: Line 33:
 ===== Link to current observations ===== ===== Link to current observations =====
  
-Data quicklooks can be found in the [[http://gop.meteo.uni-koeln.de/~Hatpro/dataBrowser/dataBrowser3.html?site=JOYCE&date=-1&UpperLeft=MRR_IMProToo&UpperRight=MRR_AveData&LowerRight=Parsivel-Pluvio-MRR_precipitation-rate|JOYCE quicklook browser]].+Data quicklooks can be found in the [[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser2.html?site=JOYCE&date=-1&UpperLeft=MFRSR_Narrowband&UpperRight=MFRSR_Broadband|JOYCE quicklook browser]].
  
 ===== Measurement examples ===== ===== Measurement examples =====
mfrsr.1598810063.txt.gz · Last modified: 2020/08/30 19:54 by bpospich