combined Speed-Direction Anemometer

In the framework of Ev-K2-CNR / SHARE (Stations at High Altitude for Research on the Environment) project the first permanent Automatic Weather Station (AWS) has been installed in Uganda, on July 18, 2006 in the western part of the Stanley Plateau, the biggest Rwenzori glacial mass. The Project was carried out during the celebration of Mt. Ruwenzori first ascent by Duke of Abruzzi in 1906 . This station has the same technical characteristics of the Ev-K2- CNR networks located in the high altitude regions of Himalaya and Karakorum. The station records continuously measurements of the seven meteorological standard parameters: air temperature, relative humidity, wind speed and direction, atmospheric pressure, global solar radiation and total precipitation. The Rwenzori observations will permit to study physical and dynamical processes at Africa high elevations in the framework of SHARE and GEWEX-CEOP HE programs to improve our understanding of variability and change in hydrological and energy cycles and their role in the climate system.
 
Citation proposal
(2011) . combined Speed-Direction Anemometer. https://geoportal.mountaingenius.org/geonetwork/srv/api/records/5a57ede3-a935-43e2-a4ef-37d567691566
 

INSPIRE

Identification

File identifier
5a57ede3-a935-43e2-a4ef-37d567691566   XML
Hierarchy level
Series
Online resource
Protocol
WWW:LINK-1.0-http--link
Protocol
WWW:DOWNLOAD-1.0-http--download
Protocol
WWW:DOWNLOAD-1.0-http--download
Resource identifier
Metadata language
eng
Encoding
Projection
code
WGS 84 (EPSG:4326)
 

Classification of data and services

Topic category
  • Climatology, meteorology, atmosphere
  • Environment
  • Geoscientific information
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Keywords

GEMET ( Theme )
  • thermal power plant
GEMET ( Theme )
  • thermal power plant
GEMET ( Theme )
  • thermal power plant
Other keywords
Keywords ( Theme )
  • NEXTDATA
Keywords ( Theme )
  • NEXTDATA
Keywords
  • SHARE , Network , Station , High Altitude
Keywords ( Theme )
  • AWS
Keywords ( Place )
  • Rwenzori Range , Uganda , Elena Glacier
Keywords ( Theme )
  • wind speed , wind direction
Keywords ( Theme )
  • NEXTDATA
Keywords
  • SHARE , Network , Station , High Altitude
Keywords ( Theme )
  • AWS
Keywords ( Place )
  • Rwenzori Range , Uganda , Elena Glacier
Keywords ( Theme )
  • wind speed , wind direction
Keywords ( Theme )
  • NEXTDATA
Keywords
  • SHARE , Network , Station , High Altitude
Keywords ( Theme )
  • AWS
Keywords ( Place )
  • Rwenzori Range , Uganda , Elena Glacier
Keywords ( Theme )
  • wind speed , wind direction
 
 

Geographic coverage

N
S
E
W


 

Temporal reference

Temporal extent
Temporal extent
Date ( Publication )
2011-03-30T17:51:00
 

Quality and validity

Lineage

The DNA022 Lsi-Lastem combined wind speed-direction sensor is mounted on a 5m pole on Rwenzori station in 2006.

The CombiSD sensor includes, in a single apparatus, the both transducers for measuring wind speed and wind direction. Its use simplifies the installation and the plant design in respect of the sensors with separate measurements plus giving some other advantages being smaller, lighter and cheaper. The CombiSD DNA022: sensor has a direct signal output. Frequency (Hz) for wind speed and resistance (Ohm) for wind direction. The CombiSD has low power consumption, it can be used in systems with small energy availability.

The technical characteristics are:

- Principle of operation: 3 cups and vane anemometer

- Speed sensor: Optoelectronic disk

- Direction sensor: 2000 Ohm wire potentiometer / Positioning Hall effect sensor

- Housing: Heavy gauge anodised aluminium

- Shaft carriers: Low-torque stainless steel bearings

- Protection (vertical position): IP65

- Mechanical mounting: On 48 50 mm diameter mast

- Electrical outlet terminators: IP65 watertight connector

- Weight (instrument with rotors): 950 gr.

The Physical and operational specification are:

- damage threshold > 75 m/s

- operating temperature: -30°+70°C

The speed measures are specified by:

- Measurement range: 0-60 m/s (using transfer function)

- Threshold: 0,21 m/s

- Response time (63% at 5 m/s): 0.8 s

- Distance constant (delay distance) at 5 m/s: 4 m

- Resolution (integration time=1s): 0.05 m/s

- Accuracy & Linearity: 0,1 m/s+1%VL (readout), if connected to LASTEM data loggers.

The direction measures are specified by:

- Measurement range: 0 ÷ 360

- Threshold: 0,15 m/s

- Response time (at 5 m/s): 0,26 s

- Delay distance (at 5 m/s): 1,32 m

- Damping coefficient (VDI3786): 0,21

- Transfer function: Dir(°)= 355 x R(Ohm)/2000

- Resolution: 0,1

- Accuracy: 1% FS (Full scale)

- Integral linearity: 0,5%

 

Conformity

Conformity
Conformity
 

Conformity

Conformity
Conformity
 

Restrictions on access and use

Access constraints
 

Restrictions on access and use

 

Responsible organization (s)

Contact for the resource
Organisation name
Ev-K2-CNR
Email
evk2cnr@evk2cnr.org
 

Responsible organization (s)

Contact for the resource
Organisation name
Ev-K2-CNR
Email
evk2cnr@evk2cnr.org
 

Metadata information

Contact for the metadata
Organisation name
Ev-K2-CNR
Email
metadata@evk2cnr.org
Date stamp
2011-11-22T16:01:04
Metadata language
eng
Character set
UTF8
 
 

SDS

Conformance class 1: invocable

Access Point URL
Endpoint URL
Technical specification
 

Conformance class 2: interoperable

Coordinate reference system
 
Quality of Service
 
Access constraints
Limitation
 
Use constraints
Limitation
 
Responsible custodian
Contact for the resource
 
 

Conformance class 3: harmonized

 
 

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