EINDHOVEN, THE NETHERLANDS

Contacts: A. J.F. Rutten / Jan Diepens Eindhoven University of Technology B-FAGO P.O. box 513 5600 MB Eindhoven, The Netherlands Tel : (31) 40 47 3514 / 3350 Fax : (31) 40 43 8595 E-mail : toru@fago.bwk.tue.n1 jadi@fago.bwk.tue.n1 Server :	Station Location: Eindhoven, The Netherlands. Latitude: 51°27' N Longitude: 5°29' E Height above sea level: 70 m. Local Time: GMT+1 Code: NLD1 Type: Research class. Operation: Version 0: Started in Jan 1991. Version 1: Started in Feb 1992.
Topographic map showing the land within a 5 km radius of the station location

EINDHOVEN, THE NETHERLANDS

Site surroundings: The station is located on top of the main building of the Eindhoven University Complex. The complex is located in the north east part of the center of Eindhoven, a city with 200,000 inhabitants. About 80% of the surroundings within a 5 km region consist of low rise commercial buildings and urban housing. The remaining 20% look out on park land and suburban housing. The A2/E25 highway is 5 km from the measurement station.	Climate characteristics: Climate is moderate maritime. Average temperatures are 2.3°C in January, 17.1°C in July and 9.6°C over the year. Average annual sunshine duration is 1390 hours. The average number of foggy days in a year is 77, in spring 14, autumn 27, summer 14 and in winter 22. The closest weather station is located at 51°27' N and 5°25' E.
Map showing the immediate surroundings of the station

EINDHOVEN, THE NETHERLANDS

Sampling Interval: 1 mn. (6 mn. for sky scans) Recording Interval: 1 mn. (6 mn. for sky scans) Illuminances: Global horizontal: EUT-FAGO-CTD Diffuse horizontal: EUT-FAGO-CTD North vertical: EUT-FAGO-CTD East vertical: EUT-FAGO-CTD South vertical: EUT-FAGO-CTD West vertical: EUT-FAGO-CTD Irradiances: Global horizontal: Kipp & Zonen CM 11 Diffuse horizontal: Kipp & Zonen CM 121 Verticals N,E,S,W: Kipp & Zonen CM 11 Others: Zenith luminance: EUT-FAGO-CTD Luminance and Radiance distribution: EUT-FAGO-CTD (Sky scanner MKIII) Shadow band specifications: Diffuse illuminance: radius: 30.4 cm / width: 5.4 cm Diffuse irradiance: radius: 31.0 cm / width: 5.7 cm

Station map Obstruction for the global horizontal illuminance sensor

Comments In a cooperation between our group and the Eindhoven University Central Technical Services, several daylight measurement instruments have been designed and manufactured: - a sky scanner MKIII with luminance tube (opening angle of 11.2°) measuring 1250 data points in 40s. - sensors for horizontal, vertical and diffuse illuminance: on the basis of Hagner SD2 Sensors (up to 120 klux). - amplifiers for illuminance measurements indoors (up to 50 klux). - acquisition system with a 12 bit resolution. All illuminance sensors have been calibrated full range using a Hagner S2 Universal Photometer as reference. Equipment for linearity checks up to 120 klux and absolute calibration of illuminances is under construction. The irradiance sensors have been calibrated by Kipp & Zonen in January 94. An extra Kipp & Zonen Pyrheliometer tube CHI is planned for near future. Horizontal and vertical illuminances are being measured simultaneously in an office room (West orientation).

EINDHOVEN, THE NETHERLANDS

View 1 of the station	Comments A view of the station looking towards the South-West. This set-up contains all global irradiance and illuminance sensors. Ground reflection is obstructed by the black painted "gutter".
View 2 of the station	Comments A close-up picture of the Sky-scanner MKIII; the lowest tube is the 11.2° opening angle luminance tube, the other is an Eppley pyrheliometer tube, formerly used on a solar tracker.

EINDHOVEN, THE NETHERLANDS

Important modifications made to the acquisition system, recording interval modification, time during which the station was not operating...

Date	Comments
Apr 85 to Mar 86	Measurements of horizontal and vertical global illuminances and irradiances, and normal incidence solar radiation (Hagner ELV-64, Kipp & Zonen CM11, Eppley NIP).
Aug 27, 90 to Oct 11, 90	Measurement period for the sky scanner MKII (144 points + 9 circum solar) + 6 illuminances in test-room.
Jan 2, 91	Start new measurement period, in addition to scanner and test-room, also for horizontal and vertical illuminances and irradiances (Kipp & Zonen CM11 and Hagner ELV-64).
Apr 18, 91 to Jun 12, 91	Sky scanner: "differential scan" method instead of fixed scan pattern
Feb 19, 92	Start new measurement period. Start test phase sky scanner MKIII-helix scan.
May 20, 92	4 extra horizontal illuminances were added in the test-room (in addition to the existing 6 illuminances).
Nov 18, 92	Last revision of sky scanner MKIII.
Sep 7, 93	End measurement period.
Feb 94 (Planned)	Start updated IDMP - Station (Version 3).