System Introduction

The OMS dual wavelength scintillation counter system is used to directly measure sensible heat flux (H) and evapotranspiration (latent heat flux, LvE); Install meteorological station equipment, measure air temperature and humidity, air pressure, wind speed and direction, precipitation, etc., and calibrate and compare them using energy balance method.

The system consists of a data acquisition unit, a scintillation meter, a microwave scintillation meter, and meteorological elements（GPS， It consists of air temperature and humidity, air pressure, wind speed and direction, precipitation, four component net radiation, soil heat flux (2 layers), as well as chassis, brackets, power supply, software, etc.

GermanyThe MWSC 160 microwave scintillation meter launched by RPG company emits wavelengths in the millimeter (mm) band, which is sensitive to temperature and water vapor fluctuations in the atmosphere. Therefore, when used in conjunction with LAS, sensible and latent heat fluxes can be obtained along the same path. This method of directly obtaining sensible heat flux and sensible heat flux is also known as the dual wavelength scintillation meter method, also known as the Optical Microwave Scintilllometer or OMS system.

System application

ØOutput parameter atmospheric refractive indexCn2, is an important indicator for studying the characteristics of boundary layer turbulence

ØUsed aloneLAS Mk II, can directly measure sensible heat flux（H）

Ø LAS Mk IIcombineMWSC 160, can directly measure sensible heat flux（H）And evapotranspiration (latent heat flux,LvE）

ØInstall meteorological station equipment and measure wind speed, temperature, and atmospheric pressure values simultaneously

ØMeasurement parameters can be applied in fields such as agriculture, meteorology, hydrology, weather forecasting, energy balance, etc

Configuration information:

Legend display:

reference:

1. Processing and analysis of observation data from large aperture scintillation meters with different underlying surfaces-Lu LiLiu Shaomin, Xu Ziwei, Wang Jiemin, Li Xiaowen，State Key Laboratory of Remote Sensing Science, Beijing Normal University, School of Geography and Remote Sensing Science，Beijing Meteorological Bureau Meteorological Information Center，Institute of Environment and Engineering in Cold and Dry Areas, Chinese Academy of Sciences

2. Large aperture scintillation meter and its application in monitoring surface energy balance; Hu Liqin, Wu Rongzhang, Fang Zongyi (National Satellite Meteorological Center)

3. Progress in studying regional surface fluxes using large aperture scintillation meters; Lu Li, Liu Shaomin, Sun Minzhang, Wang Jiemin; National Key Laboratory of Remote Sensing Science, Beijing Normal University, School of Geography and Remote Sensing Science, Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Institute of Environment and Engineering in Cold and Dry Regions, Chinese Academy of Sciences

4. Application of Large Aperture Scintillation Monitoring System in the Jinghe River Basin of the Yellow River - Dai Dong, Qiu Shuhui, Zhang Cheng, Wu Yi; Hydrological Bureau of the Yellow River Conservancy Commission, School of Remote Sensing at Beijing Normal University, Quality Supervision, Inspection and Testing Center for Hydrological Instruments and Geotechnical Engineering Instruments of the Ministry of Water Resources

5. Closing Problem of Near Surface Energy Balance - Overview and Case Analysis;Wang JieminWang Weizhen, Liu Shaomin, Ma Mingguo, Li Xin；Institute of Environment and Engineering in Cold and Dry Areas, Chinese Academy of Sciences，State Key Laboratory of Remote Sensing Science, Beijing Normal UniversityThe School of Geography and Remote Sensing Science

6. Use LAS system to measure sensible heat flux - Zhi Keguang, Tu Gang, Lian Yi, Sui Chaoyang; Jilin Institute of Meteorological Sciences; Fu Guangji, Wang Jiang; Qian'an County Meteorological Bureau

7. Remote sensing monitoring research on the interaction between land and gas in hilly areas of the Sichuan Basin; Chen Zhongming, Gao Wenliang, Min Wenbin;Sichuan Institute of Meteorological Sciences

8.A. Lüdi, F. Beyrich, and C. Mätzler, “Determination of the Turbulent Temperature– Humidity Correlation from Scintillometric Measurements”, Bound.-Layer Meteorol., vol. 117, no. 3, pp. 525–550, Dec. 2005.

9.RPG-MWSC-160-Instrument Manual, “Installation, Operation and Software Guide”, RPG Radiometer Physics.

GmbH, ftp://ftp.radiometer-physics.de/pub/Radiometer/Manuals/.

10.Andreas E L. Two-wavelength method of measuring path-averaged turbulent surface heat fluxes [J].Journal of Atmospheric and Oceanic Technology, 1989, 6(2): 280-292.

Main equipment introduction:

New scintillation meterX-LAS MkII

Heat flux measurement is now available at * FardaImplemented on a 12km path length

Is a 4.5km path length insufficient for your research in meteorology, climate, or water conservancy? Now we offer a new scintillation instrument X-LAS MkII with a range of up to 12km. Its user friendly design makes it an ideal choice for measuring heat flux between the surface and atmospheric environment at the landscape scale. For example, through forests or large areas of mixed agriculture, or through cities to investigate the impact of urban heat island effects on weather, climate, and air quality.

What is a scintillation counter?

The scintillation meter is composed of an optical transmitter and a receiver, which are arranged at two pairs of ends of the path on the required monitoring area. Turbulence in the air is caused by various factors, such as changes in temperature, humidity, and pressure; The scintillation meter measures these changes by emitting a pulsed infrared beam from the transmitter, which is then detected by the receiver.

What is the function of a scintillation meter?

Measuring the refractive index of air using a scintillation meter（The changes in Cn2. If you insert the meteorological sensor attachment into the X-LAS MkII receiver and input the characteristics of the relevant measurement location, the scintillation meter will calculate the sensible heat flux in real time, and then observe the local regional effects, such as the urban climate of big cities like New York.

What are the new features of X-LAS MkII?

The LAS MkII, as a digital replacement for the original simulated LAS, has been on the market for several years. Nowadays, in response to customers' demand for updating the simulation of old versions, we have also designed a digital replacement version of X-LAS. The performance of the new X-LAS MkII scintillation instrument has been greatly improved, with a super large aperture that can measure over longer distances.

Apart from andThe LAS MkII has the same features and functions, but it requires almost no maintenance, provides digital signal output with internal data recording function, does not have any moving parts installed, and has low power consumption. In addition, another major advantage is the built-in display screen and keyboard.

The shell has been redesigned with carbon fiber components to reduce size and weight, enhance rigidity, and improve waterproofing. Carbon fiber also reduces the impact of outdoor temperature changes, ensuring the full reliability of data.

For details, please read all the detailed content and specifications on the product page.

MWSC-160 Microwave Scintillator

Equipment Introduction:

GermanyMWSC 160 launched by RPG companyMicrowave scintillation meterThe emission wavelength is in millimeters（The millimeter wave band is sensitive to fluctuations in temperature and water vapor in the atmosphere. Therefore, when combined with LAS, sensible and latent heat fluxes can be obtained along the same path. This method of directly obtaining sensible heat flux and sensible heat flux is also known as the dual wavelength scintillation meter method, also known as the Optical Microwave Scintilllometer or OMS system.

Equipment usage and characteristics:

·The output parameter atmospheric refractive index Cn2 is an important indicator for studying the characteristics of boundary layer turbulence

·Using LAS Mk II alone, the sensible heat flux (H) can be directly measured

·LAS Mk II combined with MWSC 160 can directly measure sensible heat flux (H) and evapotranspiration (latent heat flux, LvE)

·Install meteorological station equipment and measure wind speed, temperature, and atmospheric pressure values simultaneously

·Measurement parameters can be applied in fields such as agriculture, meteorology, hydrology, weather forecasting, energy balance, etc

Technical parameters:

Application Cases

Application 1:

The LAS system is used for water level forecasting in the Yellow River waters of China. Combined with meteorological sensors, it measures sensible heat flux, net radiation, and evapotranspiration to verify satellite measurement data. It is the world's largest system for monitoring and locating river water evaporation on the Earth's surface.

Application 2: Yushu Prefecture Environmental Protection Bureau

Application Three:

The LAS system is combined with the vortex system at Zhangye Experimental Station to conduct large-scale average flux observations, compensating for the small area of vorticity observation and significantly improving the measured energy closure rate.

Application Case 4: Nanjing University of Information Science and Technology

Installation location one: Shouxian County, Anhui Province, Shouxian Meteorological Bureau observation site

Experimental objective: To conduct comparative research by combining vortex measurement system

Underlying surface: Plain, rice paddies

Installation height:6m, effective height 6m

Path length:700m

Path orientation: north-south

to configure:LAS MKII (with Meteorological sensor kit), CNR4, hfp01sc (2 pieces) CR3000

Installation location 2: Yingtan, Jiangxi

Experimental objective: To study the water and heat flux at a large regional scale

Undercover: mixed vegetation of hills, peanuts, rice paddies, orange trees, etc

Installation height:6m, effective height 9m

Path length:840m

Path orientation: north-south

to configure:LAS MKII, CNR4, hfp01 (2), 109 (2), 03002 CR1000X