Differences

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

--- mirac [2026/05/23 07:16] – kerstin
+++ mirac [2026/05/23 08:23] (current) – kerstin
@@ Line 1: / Line 1: @@
 ====== Microwave Radar/Radiometer for Arctic Clouds MiRAC ======
-//Mentor: [[https://geomet.uni-koeln.de/institut/beschaeftigte/mech/|M. Mech]] //
+//Mentor: [[https://geomet.uni-koeln.de/institut/beschaeftigte/mech/|M. Mech]], Data: [[https://geomet.uni-koeln.de/institut/beschaeftigte/ebell/|K. Ebell]] //
-{{ :wiki:nya:mirac.jpg?400 |MiRAC}}
+{{:wiki:nya:mirac.jpg?400|MiRAC}}\\
 MiRAC ([[http://www.radiometer-physics.de/|RPG]]) on the roof of the [[http://www.awipev.eu|AWIPEV]] Atmospheric Observatory. Cloud radar (left) and radiometer (right).
@@ Line 10: / Line 10: @@
 MiRAC consists of an active and a passive remote sensing component: a 94 GHz Frequency Modulated Continuous Wave (FMCW) cloud radar (MiRAC-A) and a low-humidity profiler LHUMPRO-243-340 (MiRAC-P). MiRAC can be operated on an aircraft (nadir looking) or from the ground (zenith observations).\\
-The cloud radar transmits saw tooth frequency chirps at 94 GHz. In this way, vertical profiles of reflectivity, Doppler velocity, Doppler spectral width are detected from 150 m to 10 km above ground. Given these measurements, information on the macrophysical (cloud boundaries, type of cloud particles) and microphysical (e.g., liquid and ice water content) properties of the detected cloud can be derived. The radar is operated in a vertically pointing mode. Additionally, the system is equipped with a passive radiometric channel at 89 GHz that is sensible to cloud liquid water. Passive and active receivers are fed by the same antenna, i.e. a perfect beam overlap is accomplished.\\
+The cloud radar transmits sawtooth-frequency chirps at 94 GHz. In this way, vertical profiles of reflectivity, Doppler velocity, and Doppler spectral width are detected from 150 m to 10 km above ground. Given these measurements, information on the macrophysical (cloud boundaries, cloud particle type) and microphysical (e.g., liquid and ice water content) properties of the detected cloud can be derived. The radar is operated in a vertically pointing mode. Additionally, the system is equipped with a passive radiometric channel at 89 GHz, sensitive to cloud liquid water. Passive and active receivers are fed by the same antenna, i.e., a perfect beam overlap is accomplished.\\
-The LHUMPRO-243-340 is a microwave radiometer which contains a set of passive high frequency channels at 183.31 GHz (6 channels), at 243 GHz, and at 340 GHz. The measured brightness temperatures can be used to gain information on the humidity profile - in particular in conditions with low humidity as in the Arctic - and to gain information on the integrated ice water content.
+The LHUMPRO-243-340 is a microwave radiometer with a set of passive high-frequency channels at 183.31 GHz (6 channels), 243 GHz, and 340 GHz. The measured brightness temperatures can be used to infer the humidity profile, particularly in low-humidity conditions such as the Arctic, and to estimate the integrated ice water content.
 ===== Data =====
-  * If you are interested in receiving data please contact [[kebell@meteo.uni-koeln.de|Kerstin Ebell]]
+If you are interested in receiving data, please contact [[kerstin.ebell@uni-koeln.de|Kerstin Ebell]]
-  * [[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser1.html?site=Ny-Alesund&date=0&UpperLeft=Mirac-A_Overview | Quicklook archive]]
+[[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser1.html?site=Ny-Alesund&date=0&UpperLeft=Mirac-A_Overview | Quicklook archive]]
-/* Current measurements */
+Current measurements showing the time-height series of radar reflectivity factor, Doppler velocity, Doppler spectral width, and the brightness temperature from the passive 89 GHz channel of MiRAC-A:
 <html>
@@ Line 28: / Line 27: @@
       </a> click to enlarge
 </html>
-The figure shows the brightness temperature from the passive 89 GHz channel of MiRAC-A as well as radar reflectivity factor, Doppler velocity and Doppler spectral width of the MiRAC-A measurements.\\
-Gray areas indicate no data.
-===== History =====
+===== Deployment =====
 ^  Period  ^ Device ^  Place  ^  Project  ^
+| 03/2026 - 04/2026 | MiRAC-A | Polar 5, Svalbard | [[http://www.ac3-tr.de/|(AC)3]] |
 | 23/06/2022 - 02/03/2023 | MiRAC-A | [[http://www.awipev.eu/|AWIPEV Ny-Ålesund]], Svalbard | [[http://www.ac3-tr.de/|(AC)3]] |
 | 15/12/2020 - 29/11/2021 | MiRAC-A | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | JOYCE |
-| 03/2020 - 04/2020 | MiRAC-A | Polar 5, Svalbard |  |
+| 03/2020 - 04/2020 | MiRAC-A | Polar 5, Svalbard | [[http://www.ac3-tr.de/|(AC)3]]  |
 | 31/05/2019 - 08/01/2020  | MiRAC-A | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | JOYCE |
 | 20/09/2019 - 02/10/2020 | MiRAC-P | RV Polarstern during [[https://www.mosaic-expedition.org/|MOSAiC]], Central Arctic | [[http://www.ac3-tr.de/|(AC)3]] |