==== Drop size distribution (GOP-3) ====
Observations of the rain drop size distribution (RDSD) with ground-based disdrometers and vertically pointing [[http://www.metek.de/produkte.htm|Micro Rain Radars]]  (**MRR**) will be performed. At least 13 will be located at [[:cops_gop_sites.png|selected sites]] in order to study differences of RDSDs over flat terrain including maritime conditions on one hand and over orographically structured terrain on the other hand. A transect of MRRs will be deployed in the COPS area and coordinated with polarimetric radar (POLDIRAD/DLR) observations during COPS.
Examples of actual MRR observations can be viewed [[http://www.meteo.uni-bonn.de/forschung/gruppen/mrr/mrr2_5min.html|here]]. 

Different surface based disdrometers are used as well: 2 Joss Waldvogel disdrometer (**JWD**), 3 optical disdrometer **ODM470**, and 4 **Parsivel** disdrometers. These instruments are based on different physical principle and methods for retrieving DSDs and will thus help to keep the major uncertainty of MRR-based DSDs under control, namely a potential bias due to vertical wind.

^ Name ^ Code ^ PI ^ Location ^ Temp. Reso. ^ Vert. Reso. ^ Products ^ Data/Year ^ Availability ^ 
|MRR | [[mrr|mrr_berl]] | [[:participants|Peters]] | [[:meteorological stations|Berlin]]| 10 sec | 100 m  | RDSD | 10 GB | [[status:gop3_mrr_berl|check]] | 
|ODM470_1 | [[mrr|odk_berl]] | [[:participants|Bumke]] | [[:meteorological stations|Berlin]]| \\ | \\ | RDSD, wind speed | 1 GB | [[status:gop3_odk_berl|check]] | 
|MRR | [[mrr|mrr_berg]] | [[:participants|Simmer]] | [[:meteorological stations|Bergheim]]| 10 sec | 100 m | RDSD | 10 GB | not yet | 
|MRR | [[mrr|mrr_bonn]] | [[:participants|Simmer]] | [[:meteorological stations|Bonn]] |10 sec | 100 m | RDSD | 10 GB | not yet | 
|Parsivel | [[mrr|par_bonn]] | [[:participants|Simmer]] | [[:meteorological stations|Bonn]] | \\ | \\ | RDSD | 1 GB | [[status:gop3_par_bonn|check]] |
|MRR | [[mrr|mrr_hamb]] | [[:participants|Peters]] | [[:meteorological stations|Hamburg]] | 10 sec | 100 m | RDSD | 10 GB | [[status:gop3_mrr_hamb|check]] | 
|MRR | [[mrr|mrr_helg]] | [[:participants|Peters]] | [[:meteorological stations|Helgoland]] | 10 sec | 100 m | RDSD | 10 GB | not yet | 
|ODM470_2 | [[mrr|odk_helg]] | [[:participants|Bumke]] | [[:meteorological stations|Helgoland]]| \\ | \\ | RDSD, wind speed | 1 GB |[[status:gop3_odk_helg|check]]| 
|MRR | [[mrr|mrr_kiel]] | [[:participants|Peters]] | [[:meteorological stations|Kiel]]| 10 sec | 100 m  | RDSD | 10 GB | [[status:gop3_mrr_kiel|check]] | 
|ODM470_3 | [[mrr|odk_kiel]] | [[:participants|Bumke]] | [[:meteorological stations|Kiel]]| \\ | \\ | RDSD, wind speed | 1 GB |[[status:gop3_odk_kiel|check]]| 
|MRR | [[mrr|mrr_lich]] | [[:participants|Hagen]] | [[:meteorological stations|Lichtenau]] | 10 sec | 100 m | RDSD | 10 GB | [[status:gop3_mrr_lich|check]] | 
|JWD | [[mrr|jwd_lich]] | [[:participants|Hagen]] | [[:meteorological stations|Lichtenau]]| \\ | \\ | RDSD | 1 GB | not yet | 
|Parsivel | [[mrr|par_lich]] | [[:participants|Hagen]] | [[:meteorological stations|Lichtenau]]| \\ | \\ | RDSD | 1 GB | not yet | 
|MRR | [[mrr|mrr_lind]] | [[:participants|Engelbart]] | [[:meteorological stations|Lindenberg]]| 10 sec | 100 m  | RDSD | 10 GB | not yet | 
|MRR | [[mrr|mrr_zing]] | [[:participants|Peters]] | [[:meteorological stations|Zingst]]| 10 sec | 100 m  | RDSD | 10 GB | [[status:gop3_mrr_zing|check]] |  
|MRR | [[mrr|mrr_cop2]] | [[:participants|Peters]] | [[:meteorological stations|Black Forest]]|10 sec | 100 m | RDSD | 10 GB | not yet | 
|ODM470_4 | [[mrr|odk_cop2]] | [[:participants|Bumke]] | [[:meteorological stations|Black Forest]]| \\ | \\ | RDSD, wind speed | 1 GB |[[status:gop3_odk_helg|check]]| 
|MRR | [[mrr|mrr_cop3]] | [[:participants|Seltmann]] | [[:meteorological stations|Black Forest]]| 10 sec | 100 m | RDSD | 10 GB | not yet | 
|Parsivel | [[mrr|par_cop3]] | [[:participants|Simmer]] | [[:meteorological stations|Black Forest]]| \\ | \\ | RDSD | 1 GB | not yet | 
|MRR | [[mrr|mrr_cop4]] | [[:participants|Crewell]] | [[:meteorological stations|Black Forest]]| 10 sec | 100 m |RDSD | 10 GB | not yet | 


 --- //[[crewell@meteo.uni-koeln.de|Susanne Crewell]] 2007/03/23 16:56//