ROORKEE, INDIA

Contacts:
Dr. B. K. Saxena
Deputy Director & Head Physics Division,
CBRI
Roorkee, 247 667, India
Tel : (91) 1332 72506
Fax : (91) 1332 72272
E-mail : cbri@sirnetd.ernet.in
Server :
Station Location:
Roorkee, India.
Latitude: 29°51' N
Longitude: 77°54' E
Height above sea level: 274 m.
Local Time: GMT+5.5

Code: IND1
Type: Research class.
Operation:
Since February 1993.

Topographic map showing the land
within a 5 km radius of the station location

ROORKEE, INDIA

Site surroundings:

Roorkee is located on the banks of the Ganges canal with a population of about 150,000 inhabitants. Within a 5 km radius of the station, the environment is 60% suburban or rural housing and 40% farmland. The national highway passes through the town.

Climate characteristics:

Climate is composite, hot during summer, cold during winter and humid during Monsoon season. Average maximum and minimum temperatures in January are 20.2°C and 6.5°C and corresponding temperatures in July are 37.6°C and 23.0°C. The average annual sunshine duration is 2800 hrs. The average rainfall is 1050 mm.

Map showing the immediate surroundings of the station

ROORKEE, INDIA

Sampling Interval:
? mn.
Recording Interval:
10 mn.

Illuminances:
Global horizontal: Leeds & Northrup
Direct normal: V (lambda) corrected Si cell
Diffuse horizontal: V (lambda) and cosine corrected Si cell
North vertical: V (lambda) and cosine corrected Si cell
East vertical: V (lambda) and cosine corrected Si cell
South vertical: V (lambda) and cosine corrected Si cell
West vertical: V (lambda) and cosine corrected Si cell

Irradiances:
Global horizontal: Kipp & Zonen CM5
Direct normal: Kipp & Zonen
Diffuse horizontal: Kipp & Zonen CM5

Others:
Sky and Zenith luminance: Photo Research 301
Dry bulb temperature: Copper Constantan Thermocouple
Wet bulb temperature: Copper Constantan Thermocouple
Wind direction:
Wind speed:

Shadow band specifications:
Diffuse illuminance:
radius: 25.0 cm / width: 6.0 cm
Diffuse irradiance:
radius: 17.5 cm / width: 5.3 cm

Station map

Obstruction for the global
horizontal illuminance sensor

Comments

For vertical illuminances, a half hemisphere obstruction has been provided using a black honeycomb shield.
All the illuminance sensors have been calibrated against the Photo Research 301 and also using a standard lamp on the photometric bench in February 1993.

ROORKEE, INDIA

View 1 of the station

Comments

This view of the station is looking toward North-East. In the centre, there is the zenith luminance. In the right, there are the diffuse illuminance and irradiance sensors. Then, the direct beam illuminance, the pyrheliometer and the sunshine recorder. Finally, on the left, are the global horizontal and the four vertical illuminance sensors, the sky luminance and the spectral energy set-up.

ROORKEE, INDIA

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

Date

Comments

Oct 6, 93 to
Apr 94		Direct normal irradiance measurements have been stopped in order to make modifications to the instrument.
Feb 1, 94Sky luminance scans are now made using a data acquisition system. They were recorded manually before this date.

Last modification : March 28, 1997.
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