The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that was conducted to better understand how tropical storms form and develop into major hurricanes. NASA plans to use the DC-8 aircraft and the Global Hawk Unmanned Airborne System (UAS) configured with a suite of in situ and remote sensing instruments that was used to observe and ... characterize the lifecycle of hurricanes. GRIP deployment took place in Ft. Lauderdale, Florida, for the DC-8, and NASA Dryden Flight Research Center, California, for the Global Hawk.
The NOAA Global Hawk In-flight Turbulence Sensor (GHIS) instrument measures acceleration at the location of the instrument. Two accelerometers (2g and 5g full scale) are used on each of two measurement axes. The GHIS accelerometers are from the Model 1221 family manufactured by Silicon Designs, Inc. with a frequency response of 400-600Hz. The data system samples each sensor output at 1000 Hz and processes these data to produce mean, maximum, and root-mean square (RMS) values at 10 Hz. The processed data are then broadcast on the GH internet and brought to the ground via Status and User UDP packets. GHIS operated on the Global Hawk for the Genesis and Rapid Intensification Processes (GRIP) experiment and collected data between Aug 15, 2010 - Sep 23, 2010.