A solar sensor of equivalent performance to the Campbell Stokes, suitable for use at unattended automatic weather stations, is described. The principle of operation is based upon the appearance of distinct shadows with the onset of bright sunshine. The brightness of a surface illuminated by the sun is compared to the brightness of a surface in shade - the surfaces being scanned by photocells. The micropower electronics of the sensor are outlined and results of the performance are presented.
Automated Meteorological Systems
- Pub Date:
- Solar Sensors;
- Automatic Control;
- Photoelectric Cells;
- Weather Stations;
- Instrumentation and Photography