Meetings

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CREW 3

The Third Cloud Retrieval Evaluation Workshop (CREW 3) was held from 15-18 November 2011 in Madison, Wisconsin, USA. The Workshop was hosted by the University of Wisconsin-Madison and co-sponsored by Eumetsat. The workshop was attended by experts working with operational cloud parameter retrieval schemes from passive imaging sensors (SEVIRI, AVHRR, and MODIS), passive microwave sensors (AMSR), and active lidar and radar sensors (CLOUDSAT, CALIOP), who contributed to the cloud parameter inter-comparison and validation campaign that is connected to the workshop. More detailed information about the conference premises can be found at http://www.ssec.wisc.edu/crew/index.html.

Program Sessions
Program as pdf
Abstracts as pdf
List of participants (71 participants)
FTP link to all presentations (only for registered CREW participants, please email us for registration instructions)
Photos of CREW 3

CREW 2

The second Cloud Retrieval Evaluation Workshop took place in Locarno, Switzerland from 3 - 5 February 2009. CREW 2 went a step further than the first workshop. Additionally to the inter-comparison of SEVIRI algorithms, cloud parameters were also compared to data sets of the ATRAIN satellites CPR on CLOUDSAT, CALIPSO on CALIOP as well as MODIS and AMSR-E. CLOUDSAT is a satellite-based radar that provides a vertical view into clouds along its path. It is well suited to compare cloud top heights. CALIPSO, as a lidar sensor, is more likely to detect also thin cirrus clouds. AMSR-E is a microwave sensor and is used to compare the liquid water path over ocean from measurements in a different spectral region. MODIS has similar channel settings as SEVIRI and has a wide range of atmospheric products. In this way we gained more knowledge on the behaviour of the different retrieval schemes for different cloud conditions.

Program
Program and Abstracts as pdf
List of participants (44 participants)
Link to Workshop report
Link to Presentations (only for registered CREW participants, please email us for registration instructions)

CREW 1

The first Cloud Retrieval Evaluation Workshop took place in Norrköping, Sweden from 17-19 May 2006. CREW 1 gave a good overview on the available retrieval schemes, their applications and their differences. The idea was to present the output of the algorithms not only in individual presentations, but also to have an independent and objective inter-comparison of the data. For this purpose all participants provided the results of their algorithms for one observation day. The analysis for this first workshop was limited to inter-comparison of SEVIRI algorithms.

List of participants (23 participants)
Link to Workshop report