SHEFFIELD, UNITED KINGDOM

Contacts: Prof. Peter Tregenza School of Architectural Studies The University of Sheffield PO Box 595 Sheffield S10 2UJ, United Kingdom Tel : (44) 1142 76 85 55 Fax : (44) 1142 79 82 76 E-mail : p.tregenza@sheffield.ac.uk Server :	Station Location: Sheffield, United Kingdom. Latitude: 53°23' N Longitude: 1°29' W Height above sea level: 110 (+20 storey building) m. Local Time: GMT+0 Code: GBR4 Type: Research class. Operation: Started February 1993.
Topographic map showing the land within a 5 km radius of the station location

SHEFFIELD, UNITED KINGDOM

Site surroundings: The site is close to the city centre which has 0.5 million inhabitants. Within a 5 km radius the land is 85% offices and suburban housing, and 15% scrub land with grass and small plants.	Climate characteristics: The climate is temperate maritime. Average January temperature is 4°C, in July it is 16°C. Average annual sunshine duration is 1230 hours. The nearest weather station is at R.A.F. Finningley, 35 km East.
Map showing the immediate surroundings of the station

SHEFFIELD, UNITED KINGDOM

Sampling Interval: 1 mn. Recording Interval: 1 mn. Illuminances: Global horizontal: Krochmann 910 GV Diffuse horizontal: Krochmann 910 S Direct normal: Eppley mounted Licor North vertical: Krochmann 910 GV East vertical: Krochmann 910 GV South vertical: Krochmann 910 GV West vertical: Krochmann 910 GV Irradiances: Global horizontal: Kipp and Zonen CM11 Diffuse horizontal: Kipp & Zonen CM11/121 Direct normal: Eppley N.I.P. North vertical: Kipp and Zonen CM11 East vertical: Kipp and Zonen CM11 South vertical: Kipp and Zonen CM11 West vertical: Kipp and Zonen CM11 Others: Zenith Luminance: Krochmann Sky Scanner Dry Bulb Temperature: Skye Instruments SDL2545 Relative humidity: Skye Instruments SDL2545 Shadow band specifications: Diffuse illuminance: radius: 31.0 cm / width: 5.5 cm Diffuse irradiance: radius: 31.0 cm / width: 5.5 cm

Station map Obstruction for the global horizontal illuminance sensor

Comments As well as measuring the zenith luminance, the sky scanner measures sky luminance distribution at certain times. A Nikon F4 camera with fish eye lens records cloud cover every six hours. The Krochmann and Kipp & Zonen cells were checked against BRE cells during June 1993.

SHEFFIELD, UNITED KINGDOM

View 1 of the station

Comments This view is taken looking North-West. On the far left is the solar tracker with the direct illuminance and irradiance. Then there is the vertical + global irradiances, with the diffuse irradiance behind it on the right. After the 2 lightning protection poles is the diffuse illuminance, then the global + vertical illuminances. Finally, on the right of the picture is the sky scanner.

View 2 of the station

Comments This photograph is taken looking approximalely East. At the left of the photo is the diffuse illuminance and the sky scanner. Behind it is the camera box and the glass dome. In the foreground, is the diffuse irradiance, with the global + vertical illuminances in the rear. To their right is the vertical + global irradiances. At the right of the photo is the solar tracker, with its shorter lightning protection.

SHEFFIELD, UNITED KINGDOM

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

Date	Comments
Feb 25, 93	The first day that the direct (solar) illuminance and irradiance detectors were put on the roof.
Up to May 13, 93	Before this date the thermostat for the diffuse illuminance was not working perfectly.
May 25, 93 to Jul 8, 93	Sky scanner was being mended, so no luminance data are available for this time.
Aug 9, 93 to Aug 23, 93	No data were taken during this time.