Statement of Facts

A panel which covers the underside of an roof overhang, cantilever, or mansard.

Fresh bread.

Water that is free of magnesium or calcium salts.

The programs and instructions which direct a computer.

Speed Over Ground, speed relative to bottom.

Instrument used to measure the amount of water evaporated from the soil surface during a given time interval.

Moisture contained in the soil above the water table, including water vapor which is present in the soil pores. In some cases this term refers strictly to the humidity contained in the root zone of plants.

Thermometer for measuring the temperature in the soil at different depths.

The legal issues related to protecting or ensuring access to sunlight to operate a solar energy system, or use solar energy for heating and cooling.

A type of solar thermal system where air is heated in a collector and either transferred directly to the interior space or to a storage medium, such as a rock bin.

The angle between a line from a point on the earth's surface to the center of the solar disc, and a line extending horizontally from the point.

A group of solar collectors or solar modules connected together.

The angle between the sun's apparent position in the sky and true south, as measured on a horizontal plane.

A solar photovoltaic device with a specified area.

A device used to collect, absorb, and transfer solar energy to a working fluid.

The average amount of solar radiation that reaches the earth's upper atmosphere on a surface perpendicular to the sun's rays; equal to 1353 Watts per square meter or 492 Btu per square foot.

Amount of solar radiation incident, per unit area and time, on a surface which is perpendicular to the radiation and is situated at the outer limit of the atmosphere, the earth being at its mean distance from the sun. It equals approximately 2.00 ly/ min ...

The use of solar thermal energy or solar electricity to power a cooling appliance. There are five basic types of solar cooling technologies: absorption cooling, which can use solar thermal energy to vaporize the refrigerant; desiccant cooling, which can u ...

The apparent angle of the sun north or south of the eath's equatorial plane. The earth's rotation on its axis causes a daily change in the declination.