Title
Observations and modeling of fog by cloud radar and optical sensors
Author
Li, Y.
Hoogeboom, P.
Russchenberg, H.
Publication year
2014
Abstract
Fog is a significant factor affecting the public traffic because visibility is reduced to a large extent. Therefore the determination of optical visibility in fog from radar instruments has received much interest. To observe fog with radar, high frequency bands (millimeter waves) have the best option. A 35 GHz cloud radar at the Cabauw Experimental Site for Atmospheric Research in the Netherlands has been used to make fog measurements in the "fog mode". Meanwhile, in-situ visibility sensors (Biral SWS-100) and FSSP (Forward Scattering Spectrometer Probe) installed on a mast at Cabauw are also in use which provide visibility and drop size distribution (DSD) respectively. The synergy of remote sensing instruments at Cabauw is an essential prerequisite for fog observations. A fog case is analyzed in terms of the relations between radar reflectivity, visibility, liquid water content, and effective radius which depend on the DSD. In this paper, the modeling of fog is based on the assumption of gamma distribution as fog DSD, and is compared with the fog measurements. The results indicate the reliability of the model. © 2014 EuMA.
Subject
Observation, Weapon & Protection Systems
RT - Radar Technology
TS - Technical Sciences
Radar
Defence, Safety and Security
DSD
Fog
Modeling
Optical sensors
Radar reflectivity
Visibility
Forward scattering
Millimeter waves
Models
Reflection
Atmospheric research
Drop size distribution
High frequency bands
Remote sensing instruments
Radars
Radar measurement
To reference this document use:
http://resolver.tudelft.nl/uuid:95023fd4-48d3-4cda-b382-617c42cbf213
DOI
https://doi.org/10.1109/eurad.2014.6991322
TNO identifier
525562
Publisher
EuMA, Louvain-la-Neuve
Source
European Microwave Week EuMW 2014, Proceedings of the 11th European Radar Conference, EuRAD 2014, 6-7 Oct 2014, Rome, Italy, 521-524
Document type
conference paper