More Data by Dropsonde
The precision of parachute-borne weather measurements increases nearly a
hundredfold with the advent of the GPS dropsonde. With Global
Positioning System technology helping to track its location, the
dropsonde is used to measure temperature, moisture, and air pressure and
infer wind speeds every 5 to 10 meters (16 to 33 feet) as it descends
from a research aircraft. In 1998, the GPS dropsonde retrieves the first
detailed data from within the eyewall of a hurricane.