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--- radiation [2020/08/31 13:36] – [Measurement examples] bpospich
+++ radiation [2021/03/01 10:19] (current) – [Link to current observations] bpospich
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 ===== Principle =====
-Two pyranometers (CMP 21), a pyrheliometer (CHP 1) and a pyrgeometer (CGR 4) are used to measure solar shortwave radiation and terrestrial longwave radiation. One pyranometer receives total downward solar irradiance. The other instruments are mounted on a suntracker (SOLYS 2) measuring diffuse downward solar irradiance (shaded pyranometer), direct solar irradiance (pyrheliometer) and terrestrial downward irradiance (shaded pyrgeometer). All instruments were produced and calibrated by Kipp&Zonen B.V., Netherlands.
+Two pyranometers (CMP 21), a pyrheliometer (CHP 1) and a pyrgeometer (CGR 4) are used to measure solar shortwave radiation and terrestrial longwave radiation. One pyranometer receives total downward solar irradiance. The other instruments are mounted on a suntracker (SOLYS 2) measuring diffuse downward solar irradiance (shaded pyranometer), direct solar irradiance (pyrheliometer) and terrestrial downward irradiance (shaded pyrgeometer). All instruments were produced and calibrated by Kipp&Zonen B.V., Netherlands. For further information about the measurements, please contact [[https://www.fz-juelich.de/SharedDocs/Personen/IEK/IEK-8/DE/PhotochemieUndRadikale/bohn_birger.html?|B. Bohn]]
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 ===== Data availability =====
-The following data products are provided via the SAMD database. If you would like to have additional data or recent data that have not been uploaded to SAMD yet, please fill the {{ :joyce_data_request_form.pdf |data request sheet}} and send it to [[mailto:info@joyce.cloud|info@joyce.cloud]]
+The following data products are provided via the SAMD database. If you would like to have additional data or recent data that have not been uploaded to SAMD yet, please fill the {{ :joyce_data_request_form.pdf |data request sheet}} and send it to [[mailto:info@joyce.cloud|info@joyce.cloud]].
 ^ Dataset     ^ Temporal resolution       ^ File size          ^ Filename   ^ Remarks   ^
-| Downwelling shortwave irradiance   | 5 seconds    | 1 file per day (555 KB)     | //sups_joy_pyrg00_l1_rlds_v01_YYYYMMDDHHMMSS.nc//  | available via SAMD   |
+| Downwelling shortwave irradiance   | 5 seconds    | 1 file per day (555 KB)     | //sups_joy_pyr00_l1_rlds_v01_YYYYMMDDHHMMSS.nc//  | available via SAMD   |
 | Downwelling longwave irradiance   | 5 seconds    | 1 file per day (555 KB)     | //sups_joy_pyrg00_l1_rlds_v01_YYYYMMDDHHMMSS.nc//  | available via SAMD   |
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 ===== Link to current observations =====
-Data quicklooks can be found in the [[http://gop.meteo.uni-koeln.de/~Hatpro/dataBrowser/dataBrowser1.html?site=JOYCE&date=-365&UpperLeft=Radiation_downwelling_fluxes|JOYCE quicklook archive]]. Attention, quicklooks are only available several days after the measurement.
+Data quicklooks can be found in the [[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser1.html?site=JOYCE&date=-31&UpperLeft=Radiation_downwelling_fluxes|JOYCE quicklook archive]]. Attention, quicklooks are only available several days after the measurement.
 ===== Measurement examples =====
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-===== JOYRAD-35 History =====
+=====  History =====
 ^  Period  ^  Place  ^  Project  ^
-| 2017 |  |  Instrument upgrade |
+|  April 2014 - today | Forschungszentrum Jülich | JOYCE |
-| 09/03/2012 - today | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | JOYCE |
-| 08/11/2011 - 08/03/2012 | Munich Airport, Germany| iPort campaign |
-| 03/2011 - 07/11/2011 | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | JOYCE |
+Total solar irradiance measurements started in 2006, pyrgeometer measurments in 2011, suntracker measurements in 2014.
-{{:wiki:instruments:joyrad35_07.jpg?direct&600|JOYRAD-35 ©B. Pospichal}} \\
-//Cloud radar JOYRAD-35 installed at Jülich//
 ===== Technical Specifications =====
-^ Parameter  ^ Specification  ^ Remark  ^
-| Frequency | 35.5 ± 0.15 GHz  | corresponds to wavelength of 8.5 mm |
+^  Parameter  ^  Specification  ^  Remark  ^
-| Peak power (max) | 25 kW  |  |
+| Total solar irradiance (CMP 21)| Secondary standard (WMO)| |
-| Average power | ~ 24 W |  |
+| Diffuse solar irradiance (CMP 21)| Secondary standard (WMO)| shaded |
-| Pulse width | 200 ns | adjustable (100, 200, or 400 ns)  |
+| Direct solar irradiance (CHP 1)| First class (WMO)| tracked |
-| Pulse repetition frequency | 5 kHz | adjustable (5-10 kHz) |
+| Terrestrial irradiance (CGR 4)| Certified calibration | shaded |
-| Minimum height | 150 m | full sensitivity above 400 m  |
+| Manufacturer | Kipp & Zonen B.V., NL | |
-| Measuring range | 15 km | adjustable (7.5-30 km)  |
+| Data logger (CR3000)| 16-bit | 5 s time resolution |
-| Range resolution | 30 m | adjustable (15, 30, or 60 m) |
+| Manufacturer | Campbell Scientific Inc., UK |
-| Antenna beam width | 0.6° | |
-| Doppler velocity resolution | 0.025 m/s | depends on FFT length |
-| Maximum unambiguous velocity | ±20 m/s |  |
-| Maximum sensitivity at 5 km (integration 0.1 s) | -45 dBZ |  |
-| Calibration system accuracy | ±0.5 dB |  |
-| Number of gates (with simultaneous stored raw data) | 500 |  |
-| Number of averaging spectra | 200 | adjustable (1-32768) |
-| Manufacturer | [[http://www.metek.de/|Metek]] |
-                                    |