ADVANCED OPERATIONAL LIDARS FOR CHALLENGING APPLICATIONS:TEMPERATURE AND HUMIDITY LIDAR

RAYMETRICS SA

ADVANCED LIDARS FOR ATMOSPHERIC

APPLICATIONS

MARCH, 2019

RAYMETRICS AT A GLANCE

Raymetrics S.A. (“Raymetrics” or the “Company”) is a global leader in atmospheric LiDAR)

manufacturing

The Company mainly serves the meteorology, aviation, mining, military and academia and research sectors with a total installed base of around 70 systems)

The product portfolio comprises Standardized Vertical Profiling- and Standardized 3D-Scanning LiDARs with the ability to combine new technology with existing systems such as RADAR

In addition, Raymetrics offers customization for all its LiDAR-systems as well as installation, systems integration, maintenance services and training for new and existing customers

Founded in 2002, the Company is headquartered in Athens (Greece) and employs ca. 20 people

PRODUCT PORTFOLIO

▪Standardised solutions for

meteorological applications including

cloud height, volcanic ash, dust, fire

smoke and particle detection as well

as atmospheric aerosol loading

measurements

▪Most powerful LiDAR system in the

product portfolio

▪Remains within the limits of the EU

Standard on Laser Safety)

▪Standardised solution mainly for various

applications including incoming fog and

cloud height detection as well as remote

visibility measurements, mapping and

localisation

▪Other application include pollution source

profiling (dust, smoke or plume for

factory operations)

▪Remains within the limits of the EU

Standard on Laser Safety) and complies

with the international standard for air

quality and environmental meteorology)

Standardised

Vertical Profiling

Standardised

3D-Scanning Customized solutions

▪ Custom Lidar development for

various applications

▪Different wavelength options

▪Different telescope diameter

▪DIAL Lidars

▪Rotational Raman Lidars

VALUE CHAINTHROUGH ITS EXTENSIVE R&D EFFORTS, RAYMETRICS IS ABLE TO GENERATE MAXIMUM VALUE

AND THEREBY UNDERPINS ITS TECHNOLOGICAL LEADERSHIP

Research and

developmentProcurement Assembly Testing Distribution End-User

System Design Emitter (Laser)Direct Sales Meteorological

Software

Development

Prototype

development

Sustained

Engineering

Scanner and

Optics

Photo detector

and receiver

Position (GPS)

systems

Indirect Sales Academia

Aviation

Military

Oil & Gas

Others

Civil Protection

WHAT IS LIDAR?

The LIDAR technique is based on the emission of laser pulse which interacts

with atmosphere (molecules, particles, pollutants).

LIDAR comes from Light Detection And Ranging

LIDAR is a Remote Sensing Technique

Remote Sensing: A technique (science) of obtaining information about an object

or quantity without having the sensor is direct physical-contact with the object

(like in-situ methods, e.g.: typical thermometers)

However there is a “medium” that carries the information. For lidar is the

Light.

HOW DOES

IT WORK? The LIDAR technique is a state-of the-art

method of monitoring the chemical and physical

parameters of atmosphere. It offers the possibility

of studying the spatial distribution and temporal

development of atmospheric parameters with

high accuracy.

TRADITIONAL TEMPERATURE AND HUMIDITY MONITORING AND DRAWBACKS

Radiosondes (expensive-in terms of yearly use, and only 1 or 2 per day are used, large sampling errors, inability to measure profiles in real vertical column)

Microwave Radiometers (passive remote sensing systems with low altitude resolution 300m at the ground and 1km at 2km altitude, unable to observe the correct gradient of the lower tropospheric temperature)

Satellites (Remote sensing techniques from space have vertical resolutions that are too low, greater than 1km in the lower troposphere, and are thus not able to resolve temperature inversions)

Lidar (The only ground based remote sensing technique with 24/7 data capability and with a spatial resolution 60-900m, able to offer lower tropospheric temperature observations , including inversions with high accuracy)

RAYMETRICS

SOLUTION

TEMPERATURE AND HUMIDITY LIDAR SYSTEM

Based on Rotational Raman lidar technology

we provide :

• Atmospheric temperature profile;

• Water vapor mixing ratio profile;

• Aerosol extinction, backscatter, and

depolarization coefficient profiles.

Performance, Function and features of a standard

system:

• Emission wavelength nm 354.8

• Telescope diameter mm >350

• Effective range (day) km 0.3 - 4.0

• Effective range (night) km 0.3 - 18

• Spatial resolution m 60 – 900

• Temporal Resolution min 10 - 90

• Water Vapor profiles Dusk to dawn measurements

SAMPLE DATA: Temperature and Water Vapor Mixing Ratio

RAMAN LIDAR OBSERVATIONS HAVE COME TO CLOSE A GAP IN THE

PLANETARY BOUNDARY LAYER (PBL) AND LOW TROPOSPHERE (LT)

OBSERVATION SYSTEMS

Provide high quality measurements with unprecedented spatial and temporal

resolution.

Such systems can be successfully be assimilated to weather forecast models, allowing

a more skilful weather and precipitation forecast. (The assimilation of

temperature lidar profiles improves the representation of the pre-convective

environment in the model-improves the forecasting of clouds and precipitation)

An observational network of Lidars measuring Temperature and Humidity in

combination with data assimilation in high-resolution models, will improve

significantly nowcasting and short-range forecasting especially for convective

processes and clouds!

ACCURATE PROFILING OF ATMOSPHERIC TEMPERATURE AND HUMIDITY WITH A NEW LIDAR SYSTEM FROM RAYMETRICS

GEORGE GEORGOUSIS, GEORGE TSAKNAKISRAYMETRICS S.A., ATHENS, GREECE

PRESENTED AT:WMO_CIMO TECO AMSTERDAM OCTOBER 2018

TRUSTED BY SCIENTISTS AND

OPERATIONAL AGENCIES WORLDWIDE

CONTACT US

RAYMETRICS S.A.

32 Spartis Str, Metamorphosis, GR-14452, Athens, Greece

T+30 210 6655860

F +30 210 2827217

kefstathiou@raymetrics.com