Use your tools to see what the Landsat sensors see from 920 km above the Earth.
Go outside with your instruments, preferably on a sunny to partly cloudy day.
First, measure the intensity of the sunlight by pointing the LED toward the Sun. Do not look directly at the Sun while doing this.
Estimate your pointing by either
(a) watching the voltage and move the LED to find the maximum value, or
(b) looking at the shadow of the LED on the ground—the smallest shadow of LED will mean it’s pointing directly at Sun.
Second, point your LED at the ground and record the voltage and the surface type. If you have a partly cloudy sky, continue to measure the intensity of sun light before each measurement.
Measure a variety of surfaces. Record your observations and measurements in a table like the one below.
