Weather measurements and predictions are critical to all Research Airport operations, rocket and balloon launches, and in safely conducting hazardous operations on the ground. Wallops meteorological services provide measurements of upper atmospheric and magnetic phenomena to augment and enable the collection of scientific data by sensors aboard flight vehicles. The S-band Doppler radar system at Wallops, known as SPANDAR, is capable of automatic unambiguous tracking of targets up to 60,000 kilometers away. It can detect a single raindrop of 3 millimeters at a range of 10 kilometers and cloud water content as little as 1 gram per cubic meter. SPANDAR's sensitivity with its dish antenna can detect small changes in the refractive index of air caused by sea breeze fronts, gust fronts, and various forms of clear air turbulence.
