Tobias Otto

Jan 152013

For IDRA data acquired between 1 October 2010 and 31 January 2012, additional quicklooks are online available:

Shown are the plan-position indicators of the

  • reflectivity corrected for gaseous and rain attenuation (dBZ),
  • estimated instantaneous rainfall rate (mm h-1),
  • specific differential phase (deg km-1), and
  • differential backscatter phase (deg).

The data is of special interest for researchers in the field of radar meteorology who want to study the influence of the so-called differential backscatter phase on X-band weather radar data. To our knowledge, this weather radar dataset is the first one for which the differential backscatter phase has been explicitly estimated.

All IDRA data shown in these quicklooks are freely available at the CESAR database. A Matlab Toolbox to read and plot the IDRA data is available here.

Jan 102013

The ATMOS group has joined its recent weather radar related research output to provide accurate and detailed estimates of the rainfall rate for its horizontally scanning weather radar IDRA placed on top of the meteorological mast at Cabauw.

Currently all IDRA data from 1 October 2010 is post-processed and the results are made freely accessible via the CESAR database.

The dataset quicklook shows the daily rain accumulation within the IDRA domain. The quicklook example shown here demonstrates the need for such high-resolution radar measurements as IDRA because precipitation can show a very large spatial variablility that can not be measured otherwise.

A Matlab Toolbox is also freely available to read and plot the IDRA data.

Nov 222012

In TU Delta, het informatieblad van de TU Delft, is een artikel over de snuffelpaal van de Cabauw Experimental Site for Atmospheric Research verschenen:

Realtime meetingen van Cabauw find u hier.

Nov 132012

The inaugurational address of Prof. Pieternel Levelt is available in Collegerama (in Dutch). Prof. Levelt speaks about satellite instruments used for the world-wide mapping of the ozone layer, air pollutants and greenhouse gases, and the insight that such measurements can provide into the complex relationships between air quality and climate.

Oct 222012

We are glad to announce that Athina Argyrouli won the best poster presentation award at the 9th International Symposium on Tropospheric Profiling (ISTP9) in L’Aquila, Italy.
Athina presented her master thesis work entitled “The effect of droplet clustering on the statistics of radar backscatter from water clouds”.

Oct 052012

Already more than one month, our meteorological radar TARA is placed in Southern France to support the measurement of the Mediterrainean hydrological cycle in the frame of the HYMEX campaign (HYdrological cycle in the Mediterranean EXperiment).

TARA radar close to Montpellier (France)

We already collected quite some data of clouds and precipitation (quicklooks of the data collected are available here).
Today we are happy to add also a radar measurement of fog. This is quite a rare occasion, because the radiation fog that we have in Cabauw (Netherlands) is usually a much thinner layer, and too close to TARA to be measured. Instead the advection fog we are currently observing in France reaches up to heights of about 500m.

Aug 012012

At the Cabauw Experimental Site for Atmospheric Research several active remote sensing instruments such as radar, lidar or sodar are placed. They monitor continuously particles in clouds and precipitation but also particles such as vulcanic ash, sea-salt or pollen.

The basis for these atmospheric measurements by radar, lidar or sodar is the active remote sensing equation. You can download here a presentation that introduces this fundamental equation which provides an analytical expression for the mean power received by an active remote sensing instrument.

Slide from the presentation with lidar/radar measurement examples
Jun 222012

ATMOS group members will be at Toulouse next week for the 7th European Conference on Radar in Meteorology and Hydrology (ERAD2012). Beside a presentation, the following two posters will be presented:

ERAD Poster on the TARA upgrade     Poster on rainfall rate retrieval with IDRA
We hope to meet you in Toulouse!
Update: Download now the extended abstract on rainfall rate retrieval with polarimetric X-band weather radar.