NovAtel's Annual Journal of GNSS Technology Solutions and Innovation

Issue link:

Contents of this Issue


Page 8 of 51

global hawk 2014 For more Solutions visit velocity 9 sure the wind velocity and wind speeds within a storm. By looking at these winds it helps us understand how a storm intensifies." During this mission, according to NASA, sci- entists want to use data from the Global Hawk flights to answer three main questions—what role does the large-scale environment, particular- ly the Saharan Air Layer (SAL), have on intensity change, what is the role of storm internal process- es such as convective towers, and to what extent are these intensification processes predictable. The two Global Hawks that are part of the HS3 mission are equipped with different pay- loads. The environmental payload is respon- sible for monitoring the environment around the storms looking for conditions that are "fa- vorable for storm formation and intensifica- tion," according to NASA. The state-of-the art weather instruments that make this possible are the scanning High-resolution Interferometer Sounder (S-HIS), the AVAPS dropsonde system, theTWiLiTE Doppler wind lidar, and the Cloud Physics Lidar (CPL). This Global Hawk is in- volved with studying the role SAL has on storm formation and intensification. The over-storm payload, which features NovAtel's SPAN technology, repeatedly flies directly over storms to "collect data on the inner-core structures that lead to storm inten- sity change," according to NASA. This Global Hawk is not only equipped with the SPAN sys- tem, it also collects field measurements using HIWRAP conically scanning Doppler radar. The radar works in conjunction with the SPAN technology, the HIRAD multi-frequency inter- ferometric radiometer, and the HAMSR mi- crowave sounder. NovAtel technology at work While the Global Hawks provide hurricane data that researchers wouldn't otherwise be able to obtain, that data must be accurate. That's where NovAtel's SPAN technology comes in. NovAtel is the leading provider of high-precision GNSS technology for unmanned systems making it a natural fit for the HS3 mission. NovAtel tech- nology has been used in Unmanned Aircraft Systems, Unmanned Airborn Vehicles and Unmanned Ground Vehicles, and in a range of The storms studied During the GRIP and HS3 missions, the Global Hawks gathered data from a variety of storms: Hurricane Karl Hurricane Earl Hurricane Mathew Hurricane Ingrid Tropic Storm Gabrielle "We actually are fl ying two NovAtel receivers and have three different radars on the NASA ER-2 plane," Heymsf eld says. "This experiment is called IPHEx and we're validating a new satellite, called GPM." The purpose of that satellite is to measure precipitation globally. We use NovAtel's ProPak-V3 receiver to provide accurate position and aircraft attitude. Our Doppler radar measurements measures the speed of rain drops and other cloud particles and we have to correct those measurements through motion in the aircraft." FIgURe 1: An ER-2 pilot took this image of a thunderstorm during the IPHEx experiment. NovAtel's SPAN system is located in the wing pod. Photo courtesy of Stuart Broce, an ER-2 pilot at NASA Armstrong Flight Research Center. Phogo courtesy of Stuart Broce, ER-2 pilot at NASA Armstrong Flight Research Center

Articles in this issue

Links on this page

view archives of Velocity - 2014