Date ( Publication )

2011-03-30T17:51:00

Purpose

The Anemometer WA15 is used to determine wind speed and direction.

The data include wind speed measurements [m/s] using a WA15 anemometer.

Measurements from this unique meteorological observatory can provide important information for the scientific community for several application, including weather forecasting and study related to the understanding climate change.

The South Col station is an important achievement for mountaineering and for science.

It is an exceptional point of weather observation, which provides important and unique meteorological data.

Status

Completed

Maintenance and update frequency

As needed

GEMET ( Theme )

• thermal power plant

Keywords

• SHARE , Network , Station , High Altitude

Keywords ( Place )

• Nepal , Mt. Everest - South Col , Himalaya

Keywords ( Theme )

• air , research , pollution , ecosystems , landscape , natural areas , climate

Keywords ( Theme )

• monsoon , subtropical jet stream , stratospheric intrusions , real time

Keywords ( Theme )

• AWS

Keywords ( Theme )

• wind speed , wind direction

Use limitation

No conditions apply

Access constraints

Copyright

Other constraints

Character set

UTF8

Topic category

• Climatology, meteorology, atmosphere
• Environment
• Geoscientific information

Supplemental Information

Reference system identifier

EPSG / WGS 1984(EPSG:4326) / 7.4

Topology level

Geometry only

Geometric object type

Point

Geometric object count

13

OnLine resource

https://geoportal.mountaingenius.org/geonetwork/srv/api/records/f2a9cc07-3529-48b8-bec7-1ed383a7536d/attachments/Data%20Usage%20Policy.pdf  

Hierarchy level

Series

Statement

The WA15 is based on accurate sensors installed on a large crossarm. It is designed for demanding wind measurement applications.

Three lightweight, conical cups mounted on the cup wheel, provide excellent linearity over the entire operating range, up to 75 m/s.

A wind-rotated chopper disc attached to the shaft of the cup wheel cuts an infrared light beam 14 times per revolution.

This generates a pulse output from the phototransistor.

The output pulse rate is directly proportional to wind speed (e.g. 246 Hz = 24.6 m/s).

However, for the highest accuracy, the characteristic transfer function should be used to compensate for starting inertia.

WA15 Technical characteristic:

Wind speed

Measurement range: 0.4 to 75 m/s

Starting threshold < 0.5 m/s

Distance constant 2.0 m

Characteristic transfer function U = 0.328 + 0.101 × R

(where U = wind speed [m/s], R = output pulse rate [Hz])

Accuracy (within range 0.4 to 60 m/s)

with characteristic transfer function ± 0.17 m/s **

with transfer function U = 0.1 × R ± 0.5 m/s***

Wind direction

Measurement range at wind speed 0.4 to 75 m/s 0 to 360°

Starting threshold: <0.4 m/s

Resolution: ±2.8°

Damping ratio: 0.19

Overshoot ratio: 0.55

Delay distance: 0.4 m

Accuracy better than ±3

gmd:MD_Metadata

File identifier

f2a9cc07-3529-48b8-bec7-1ed383a7536d   XML

Metadata language

eng

Character set

UTF8

Parent identifier

435a76f1-7d1d-4731-a734-efd535d8bd23

Hierarchy level

Series

Date stamp

2025-02-04T15:49:40

Metadata standard name

ISO 19115:2003/19139

Metadata standard version

1.0