NPOL is NASA's premier weather radar. It is one of only two mobile S-band
dual-polarization radars (the other being NCAR's SPOL). When not being
deployed for PMM/GPM field campaigns, it is operated near NASA's Wallops Flight
Facility in Newark, MD.
NPOL has a wavelength of 10.65 cm, an operating frequency of 2700-2900 MHz,
variable PRF of 500 and 1000 Hz with a 0.95 degree beam width. NPOL can
operate with both horizontal and vertical polarization in both simultaneous
and alternating modes. The radar has a prime-focus parabolic reflector which
is 8.5 m in diameter and is housed on five sea-tainers. When readied for
deployment, the entire radar and antenna system is stored within the five
The image to the right shows a network of rain gauges and disdrometer deployed
in the NPOL domain. All of these instruments are being used to help validate
GPM satellite over an area of 0.5 degrees latitude x 0.5 degrees latitude.
Click on on the image to see a higher resolution map of the network.