Differences

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--- disdrometer [2020/09/01 12:10] – bpospich
+++ disdrometer [2021/03/01 11:14] (current) – [Link to current observations] bpospich
@@ Line 1: / Line 1: @@
 ====== Disdrometer ======
-{{:wiki:instruments:parsivel07.jpg}}
+{{:wiki:instruments:parsivel07.jpg?direct&600|Parsivel ©B. Pospichal}} \\
+//Parsivel disdrometer installed at Jülich//
 ===== Principle =====
-The OTT Parsivel 2 is a laser-based optical system for complete and reliable measurement of all types of precipitation. The size range of measurable liquid precipitation particles is from 0.2 ... 5 mm, for solid precipitation particles it is from 0.2 ... 25 mm. In the process, precipitation particles can have a velocity of from 0.2 ... 20 m/s. The precipitation particles are categorized as follows:
+The **OTT Parsivel<sup>2</sup>** is a laser-based optical system for complete and reliable measurement of all types of precipitation. The size range of measurable liquid precipitation particles is from 0.2 ... 5 mm, for solid precipitation particles it is from 0.2 ... 25 mm. In the process, precipitation particles can have a velocity of from 0.2 ... 20 m/s. The precipitation particles are categorized as follows:
   * Drizzle
   * Drizzle with rain
@@ Line 17: / Line 17: @@
-===== 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 =====
-  * Temporal resolution 10 seconds
+  * Temporal resolution 1 minute
-  * Vertical resolution 35 meters (max. range = 1085 m)
+  * Precipitation amount
+  * Particle concentration and fall velocity per velocity class and diameter class)
+  * Equivalent radar reflectivity factor from particle size distribution (6th moment)
+  * Fall velocity in 32 classes (0.05, 0.15, 0.25, 0.35, 0.45, 0.55, 0.65, 0.75, 0.85, 0.95, 1.1, 1.3, 1.5, 1.7, 1.9, 2.2, 2.6, 3, 3.4, 3.8, 4.4, 5.2, 6, 6.8, 7.6, 8.8, 10.4, 12, 13.6, 15.2, 17.6, 20.8 ms<sup>-1</sup>)
+  * Particle diameter in 32 classes (0.062, 0.187, 0.312, 0.437, 0.562, 0.687, 0.812, 0.937, 1.062, 1.187, 1.375, 1.625, 1.875, 2.125, 2.375, 2.75, 3.25, 3.75, 4.25, 4.75, 5.5, 6.5, 7.5, 8.5, 9.5, 11, 13, 15, 17, 19, 21.5, 24.5 mm)
-===== 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 =====
@@ Line 37: / Line 36: @@
 ^ 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)   |
+| All variables (see above)   | 1 minute    | 1 file per day (6-7 MB)     | //sups_joy_dm00_l1_any_v00_YYYYMMDD.nc//  | in future available via SAMD |
-| 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 46: / Line 43: @@
 ===== 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/dataBrowser3.html?site=JOYCE&date=-1&UpperLeft=Parsivel_Overview&UpperRight=Parsivel-Pluvio-MRR_precipitation-rate&LowerRight=Parsivel-Pluvio-MRR_Accumulated_Precipitation|JOYCE quicklook browser]].
 ===== Measurement examples =====
-{{wiki:examples:20200617_jue_mrr_improtoo.png?direct&400|MRR_IMProToo}}
+{{wiki:examples:parsivel_overview_20200617.png?direct&400|Parsivel Overview}}
 {{wiki:examples:rr_pars_plu_mrr_20200617.png?direct&400|Rain_rate}} \\
-//Example time series of MRR observations (left: IMProToo radar reflectivity, spectral width, rain rate and mean spectral noise / right: rain rates from MRR (bottom), compared to Parsivel and Pluvio)//
+//Example time series of Parsivel disdrometer (left: Parsivel drop diameter, fall speed, particle type, precipitation rate / right: rain rates from Parsivel (top), compared to [[pluvio|Pluviometer]] and [[mrr|MRR]])//
-===== MRR History =====
+===== Disdrometer History ====
 ^  Period  ^  Place  ^  Project  ^
-| 03/2012 - today | Research Centre Jülich | [[http://www.tr32.de|TR32]] |
+| 08/2013 - today | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | [[http://www.tr32.de|TR32]] |
-| 04/2008 - 10/2011 | [[http://www.fz-juelich.de/icg/icg-4/index.php?index=500|Selhausen]], Germany | [[http://www.tr32.de|TR32]] |
-| 05 - 12/2007 | Heselbach, Blackforest, Germany | COPS |
-| 2006 - 2007 | Nangatchori, Benin | [[http://amma-international.org/|AMMA]] |