Aerosol optical properties inferred from in-situ and path-averaged measurements

This paper compares in-situ and path-averaged measurements of the electro-optical transmission, with emphasis on aerosol effects. The in-situ sensors consisted of optical particle counters (OPC) and a visibility meter, the path-averaged data was provided by a 7-wavelength transmissometer (MSRT) and a scintillometer (BLS). Data was collected at a...

In-situ and path-averaged measurements of aerosol optical properties

This paper compares in-situ and path-averaged measurements of the electro-optical transmission, with emphasis on aerosol effects. The in-situ sensors consisted of optical particle counters (OPC), the path-averaged data was provided by a 7-wavelength transmissometer (MSRT) and scintillometers (BLS). Data were collected at two sites: a homogeneous...

Comparison of MODTRAN simulations and transmission measurements by path-integrated and in-situ techniques over a rural site in northwestern Germany

A transmission experiment has been performed over an optical path of 1.53 km at a rural test site in Meppen, Northwest Germany. Direct transmission measurements were made by a 7-wavelength transmissometer. Transmission was further estimated from the average voltage received by a BLS2000 scintillometer, and evaluated with Mie theory from in-situ...

Potential Release of Manufactured Nano Objects during Sanding of Nano-Coated Wood Surfaces

Increasing production and applications of manufactured nano objects (MNOs) have become a source for human exposure and therefore raise concerns and questions about the possible health effects. In this study, the potential release of nano objects, their agglomerates, and aggregates (NOAA) as a result of sanding of hardwood treated with MNOs...

Vertical atmospheric variability measured above water during the FESTER experiment: First results

The First European South African Experiment (FESTER) was conducted over about a 10 month period at the Institute of Maritime Technology (IMT) in False Bay, South Africa. One of the important goals was to validate atmospheric refraction and turbulence models. To achieve this goal it was required to measure the vertical profile of meteorological...

Path homogeneity along a horizontal line-of-sight path during the FESTER experiment: First results

The First European South African Experiment (FESTER) was conducted over about a 10 month period at the Institute of Maritime Technology (IMT) in False Bay, South Africa. One of the important goals was the establishment of the air-sea temperature difference (ASTD) homogeneity along the main propagation link atmospheric path since it is a basic...

Calibrating a large-extent high-resolution coupled groundwater-land surface model using soil moisture and discharge data

We explore the possibility of using remotely sensed soil moisture data and in situ discharge observations to calibrate a large-extent hydrological model. The model used is PCR-GLOBWB-MOD, which is a physically based and fully coupled groundwater-land surface model operating at a daily basis and having a resolution of 30 arc sec (about 1 km at...

Using ERS spaceborne microwave soil moisture observations to predict groundwater head in space and time

The study presented in this paper is to investigate the possibility of using spaceborne remote sensing data for groundwater head prediction. Remotely-sensed soil moisture time series of SWI (Soil Water Index) derived from ERS (European Remote Sensing) scatterometers are used to predict groundwater head dynamics in the Rhine-Meuse basin, where...

Groundwater monitoring using grace and ERS satellite imager

This paper describes the initial stage of the assimilation of GRACE and ERS-1 and ERS-2 imagery with a global hydrological model. The outcome of the model will be evaluated with groundwater storage estimates based on GRACE data as well as with soil moisture estimates based on ERS-1 and ERS-2 scatterometer data.

IASI OGSE Spot Scan: Design and realization of an infrared test equipment for use in vacuum

This paper presents the development of the IASI Infrared Spot Scan test equipment, with a focus on the mechanical design. The IASI instrument, developed by Alcatel, is a spaceborne meteorological instrument, for observation of the Earth atmosphere in the infrared wavelength region. An infrared Optical Ground Support Equipment (OGSE), developed...