HTW weather station

Sensors

The following sensors are installed and monitored at the weather station of the University of Applied Sciences Berlin (HTW Berlin).

Pyranometer CMP11

Measured values
Global irradiance CMP11 measures horizontal, _br_ Global irradiance (35°) CMP11 measures 35° tilt facing South _br_ Global irradiance (35° west, 15° tilt) CMP11 measures 15° tilt facing South-West
Unit
W/m²
Description
The CMP11 a secondary standard pyranometer. It is often used as reference sensor for PV monitoring.
Data sheet
pdf

Pyranometer SMP21

Measured values
Global irradiance SMP21 measures horizontal, _br_ Global irradiance (35°) SMP21 measures 35° tilt facing South,_br_ Global irradiance (East, 35°) SMP21 measures 35° tilt facing East,_br_ Global irradiance (West, 35°) SMP21 measures 35° tilt facing West_br_ Diffuse irradiance SMP21 measures horizontal and shadowed
Unit
W/m²
Description
The SMP21 is a smart secondary standard pyranometer which shows a faster response time compared to the CMP11.
Data sheet
pdf

Silicon Pyranometer SP-Lite2

Measured values
Global irradiance SPLite2 measures horizontal, _br_ Global irradiance (35°) SPLite2 measures 35° tilt facing South,
Unit
W/m²
Description
The SP-Lite2 is a basic pyranometer for solar irradiation measurement.
Data sheet
pdf

Pyrheliometer SHP1

Measured values
Direct-normal irradiance SHP1
Unit
W/m²
Description
SHP1 is a first class pyrheliometer, used to measure direct irradiance. In combination with a tracking system the direct-normal irradiance could be acquired.
Data sheet
pdf

Solar Monitoring Station RaZON⁺

Description
ALL-IN-ONE Solar Monitoring Station RaZON+ is designed for measurement of direct-normal irradiance (DNI) and diffuse horizontal irradiance (DHI) and could therefore calculate the global horizontal irradiance (GHI) and sunshine duration very precisely. At the HTW Berlin the sensors are not directly connected with the RaZON+.
Data sheet
pdf

Wind vane

Measured values
Wind direction
Unit
0° (North) to 360°
Description
Wind vane for the measurement of the horizontal part of the wind direction
Data sheet
pdf

Anemometer

Measured values
Wind speed
Unit
m/s
Description
An accurate cup anemometer for the acquisition of the horizontal wind speed component.
Data sheet
pdf

3D Anemometer

Measured values
3D wind speed (x)_br_ 3D wind speed (y)_br_ 3D wind speed (z)
Unit
m/s
Description
Ultrasonic measurement of the wind speed and direction results in a three dimensional wind vector (x, y, z).
Data sheet
pdf

Hygro-thermal sensor

Measured values
Temperature _br_ relative humidity
Unit
°C and %
Description
This sensor is used to measure the temperature and the relative humidity of the environment. Therefore humidity is measured with a capacitive sensor while temperature is derived over a PT100 resistance measurement.
Data sheet
pdf

Barometer

Measured values
Pressure
Unit
hPa
Description
The barometer 3.1157.20.000 is part of the data-logging device Thies DL16 and not further specified.

Data logger DL16

Description
Data logger is equipped with a uninterruptible power supply (ups) and logs the mean 1 second measured values of the described devices.
Data sheet
pdf

Weather station description

Highly accurate solar, wind and environmental data is gathered at the weather station at the University of applied science Berlin (HTW Berlin) in the South-East of Berlin. The weather station has overall 15 sensors, which were readout with a sample rate of 1 s and the measurement is securely stored in a redundant data archive. Furthermore an uninterruptible power supply (ups) guaranties high uptime of the data logger. All sensors were calibrated in summer 2016. This weather station was realized as part of the research project "PV2City" (ID 1048-BS-0). This project is funded by the Berlin program for sustainable development (BENE) which is co-financed by the European Union through the European Regional Development Fund (ERDF) and the state of Berlin.

The global irradiance is measured with different technologies and different orientation above the edge of the roof. Besides basic silicon sensors also highly accurate and fast responding pyranometer were mounted to measure without any shading. The comparison of different sensor types is available for horizontal orientation and a 35° inclined plane facing South. Furthermore the measurement for 35° inclined SMP21 sensors facing East and West can be evaluated.

Besides the measurement of the global irradiance, the direct-normal and diffuse horizontal components are also measured accurately. They were obtained though a solar tracker at the foot of the weather pole. Unfortunately the trackers pyrheliometer is slightly shadowed in winter morning hours.

The installed wind sensors measure the wind from all directions freely on a pole above the edge of the roof.

Location

The weather station is mounted on the roof of the Building G at HTW Berlin located in the South-East of Berlin.

Latitude: 52.455778 ° North, Longitude: 13.523917 ° East

Historical measurements

Since 2010 weather data is available at the HTW campus. Until 2016, when the station was generally revised, the sensor portfolio was continuously extended. Therefore a few sensors has long-term data reaching backward from September 2016 to October 2010. In favor of a highly accurate irradiation measurement the illuminance sensor and the rainfall sensor were not brought back into service after 2016. It should be taken into account that those long-term measurement is only available as 1 min mean values.

The time series of the long-term measurement is also available on this page. Nevertheless keep in mind the slightly different hardware configuration.

Illuminance sensor

Measured values
Illuminance
Unit
W/m²
Description
The illuminance sensor measures the light intensity perceived by the human eye.

Rainfall sensor

Measured values
Rainfall
Unit
W/m²
Description
Rainfall sensor to measure the rainfall high on a specific area. Apperture: 200cm²