- Measure the Sun's extraterrestrial constant, the signal the
instrument would indicate if you were able to fly the Space
Shuttle and point it at the Sun during a space walk. You will do
this, of course, without leaving the ground. You will use the
same method which scientists with the Smithsonian Institution
first used in the 1880's, even though they were unable to prove
that their measurements were correct until rockets first carried
Sun photometers into space.
- Measure changes in the clarity of a column through the
atmosphere (the aerosol optical depth) caused by smog, haze,
smoke, dust, wispy clouds, fog and volcanic haze. You can do this
over the course of a day. Or you can do it at the same time every
day for a year or more and help scientists better understand the
annual cycle of haze where you live.
- Measure the light transmission of water, leaves and other
materials at about 525 nm.