The sensors aboard the Landsat satellite measures reflected radiation in seven spectral bands
from the visible through the thermal infrared. The sensors high spatial resolution (approximately
30m) makes it useful in precision agriculture. Figure 7 on page 10 shows a typical image
obtained from this satellite. The spectral response and higher spatial resolution make it suitable
for assessing vegetative condition for individual fields but the overpass frequency is only once
every 16 days. The less frequent overpass makes it difficult to use these data for assessing
rapidly changing events such as insect outbreaks or water stress.