Differences

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

--- windlidar [2020/08/31 21:05] – [JOYCE-CF Standard Operation Procedures] bpospich
+++ windlidar [2022/01/20 23:36] (current) – [Link to current observations] bpospich
@@ Line 12: / Line 12: @@
 ===== Measurement modes =====
-  * Vertically pointing observations with integration times of 15 seconds
+  * Vertical staring mode (1.67 seconds temporal resolution)
+  * Full azimuth and elevation scan capability
 ===== JOYCE-CF Standard Operation Procedures =====
 The instrument performs several scanning patterns and uses the remaining time for vertical staring.
 Scan patterns are currently:
-    every 5 minutes doppler beam swinging (DBS) (12×14sec/hour=2min48sec/hour)
+  * Every 5 minutes doppler beam swinging (DBS) (12×14sec/hour=2min48sec/hour), i.e. one vertical and two tilted beams in eastern and western direction to derive instantaneous local wind profiles
-    i.e. one vertical and two tilted beams in eastern and western direction to derive instantaneous local wind profiles
+  * Directly followed by a 3 beam VAD (VAD-3) (12×14sec/hour=2min48sec/hour), i.e. three tilted beams in at 0, 120 and 240 deg azimuth and 30deg zenith distance to derive instantaneous local wind profiles
-    directly followed by a 3 beam VAD (VAD-3) (12×14sec/hour=2min48sec/hour)
+  * Every 15 minutes a velocity azimuth display scan (VAD-36) (4×124sec/hour=8min16sec), i.e. a conical scan at 75oelevation to derive area averaged wind profiles
-    i.e. three tilted beams in at 0, 120 and 240 deg azimuth and 30deg zenith distance to derive instantaneous local wind profiles
+  * Every 60 minutes a range height indicator (RHI) (1×104sec/hour=1min44sec/hour), i.e. a vertical section from east to west with 5deg elevation steps (37beams)
-    every 15 minutes a velocity azimuth display scan (VAD-36) (4×124sec/hour=8min16sec)
+  * The rest of the time is vertical staring, i.e. vertical staring is interrupted every 5 minutes and sums up to 47minutes/hour
-    i.e. a conical scan at 75oelevation to derive area averaged wind profiles
-    every 60 minutes a range height indicator (RHI) (1×104sec/hour=1min44sec/hour)
-    i.e. a vertical section from east to west with 5deg elevation steps (37beams)
-    the rest of the time is vertical staring, i.e. vertical staring is interrupted every 5 minutes and sums up to 47minutes
@@ Line 41: / Line 39: @@
 ^ Dataset     ^ Temporal resolution       ^ File size          ^ Filename   ^ Retrieval / Remarks   ^
-| Uncalibrated attenuated backscatter (background corrected)   | 15 seconds    | 1 file per day (30 MB)     | //sups_joy_ceilo00_l1_beta_v00_YYYYMMDDHHMMSS.nc//  | from CHM15k, available on SAMD   |
+| Vertical stare data (Backscatter, Doppler velocity)   | 2 seconds    | 1 file per day (180 MB)     | //sups_joy_dlidST00_l1_any_v00_YYYYMMDDHHMMSS.nc//  | available on SAMD   |
-| Mixing layer height   | 15 minutes    | 1 file per day (0.02 MB)     | //sups_joy_ceilo00_l2_zmlaa_v01_YYYYMMDDHHMMSS.nc//  | from CHM15k, available on SAMD   |
+| 3D wind profiles from custom scanning   | 5 minutes    | 1 file per day (3.3 MB)     | //sups_joy_dlidCUST00_l2_wind_v00_YYYYMMDDHHMMSS.nc//  | available on SAMD   |
-| Backscatter, cloud base height  | 15 seconds  | 1 file per day (25 MB)   | //YYYYMMDD_JOYCE_CHM120109_000.nc//   | from CHM15k    |
+| 3D wind profiles from Doppler beam swinging  | 5 minutes    | 1 file per day (3 MB)     | //sups_joy_dlidDBS00_l2_wind_v00_YYYYMMDDHHMMSS.nc//  | available on SAMD   |
-| Backscatter, cloud base height  | 15 seconds  | 1 file per day (6 MB)   | //YYMMDD_ct25k_jue_l0b.nc//   | from CT25K    |
+| Mixing layer height from vertical velocity   | 5 minutes    | 1 file per day (180 MB)     | //sups_joy_dlidST00_l2_zmlaw_v00_YYYYMMDDHHMMSS.nc//  | available on SAMD   |
+| 3D wind profiles from VAD-36   | 15 minutes    | 1 file per day (1.6 MB)     | //wind_vad-36_YYYYMMDD.nc//  |    |
-===== Composite products using data from Ceilometer =====
-  * **Cloudnet target classification** uses cloud base height observations from the CT25K-Ceilometer. Combined with cloud radar and microwave radiometer observation, clouds are characterized by their geometrical extent as well as their microphysical properties. Data are available via [[https://cloudnet.fmi.fi/|ACTRIS cloudnet website]]
 ===== Link to current observations =====
-Current observations at [[http://gop.meteo.uni-koeln.de/~Hatpro/dataBrowser/dataBrowser4.html?site=JOYCE&date=-1&UpperLeft=Ceilo_ct25k_Backscatter&UpperRight=Ceilo_ct25k_Boundarylayer-height&LowerRight=Ceilo_chm15k_raw&LowerLeft=Ceilo_chm15k_SNR|quicklook archive]]
+Current observations at [[https://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser4.html?site=JOYCE&date=-1&UpperLeft=Windlidar_Overview_new&UpperRight=Windlidar_mean_w_new&LowerRight=Windlidar_sigma_w_new&LowerLeft=Windlidar_vad_from_scan_new|quicklook archive]]
@@ Line 57: / Line 57: @@
 ===== Measurement examples =====
-{{wiki:examples:tophat_200621_jue_l1.png?direct&400|TOPHAT-TB}}
+Current wind profile:\\
-{{wiki:examples:tophat_200621_jue_l2a.png?direct&400|TOPHAT-IWV-LWP}} \\
+{{https://atmos.meteo.uni-koeln.de/~jschween/wind_lidar/wind_profile.png?400}}\\
-//Time series of brightness temperatures (left) and Integrated Water Vapor / Liquid Water Path (right)//
+Current VAD plot:\\
+{{http://atmos.meteo.uni-koeln.de/~jschween/wind_lidar/vad.png?400}}\\
+//The figure shows a velocity azimuth display (VAD): vectors give direction and speed of horizontal wind at time and height. Vectors pointing upward indicate southerly winds, vectors pointing to the right indicate westerly winds.
+Color shading gives the backscatter coefficient.
+//
+[[http://atmos.meteo.uni-koeln.de/~jschween/wind_lidar/|Click here for more plots and explanations]]
+===== Doppler lidar History =====
+^  Period  ^  Place  ^  Project  ^
+| 12.9.2012 -   today   | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | [[http://www.tr32.de|TR32]] |
+| 26.7.2012 - 31.8.2012 | [[https://maps.google.de/maps?q=50.91275522340144N+6.30132085102542E|Engelsdorf]], Germany | [[http://www.tr32.de|TR32]]-[[internal:experiments:patvap]] |
+| 7.11.2011 - 26.7.2012 | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | [[http://www.tr32.de|TR32]] |
 ===== Technical specifications =====