NSF/NCAR Gulfstream V

NSF/NCAR Gulfstream V is a highly modified business jet operated as a premier facility for the atmospheric science community. Owned by the National Science Foundation and managed by the National Center for Atmospheric Research, this aircraft serves as a unique mobile platform for investigating a wide range of geophysical phenomena. Its exceptional range and altitude capabilities enable scientists to conduct critical observations from the tropics to the poles, probing the upper troposphere and lower stratosphere.

Overview and History

The aircraft was acquired to replace the aging NCAR Lockheed Electra and was selected for its superior performance envelope. Following its procurement, it underwent an extensive modification process at Gulfstream Aerospace facilities in Savannah, Georgia to transform it from a standard Gulfstream V into a specialized research tool. The conversion included installing numerous structural hardpoints, specialized wiring, and an advanced instrument operator station. Since entering service, it has been a central asset for major field campaigns like POLARCAT and HIPPO, operating under the oversight of the NCAR Research Aviation Facility.

Aircraft Specifications and Modifications

The airframe is based on the standard Gulfstream G500 business jet, renowned for its long-range capabilities. Key modifications include the installation of multiple apertures in the fuselage for scientific probes, a distinctive Hawaii-based Meteorological Measurement System nose boom, and reinforced wings supporting external pylons. It is powered by two Rolls-Royce Deutschland BR710 turbofan engines, enabling a maximum altitude of approximately 51,000 feet. The cabin is configured with rack-mounted instrumentation, a dedicated mission scientist station, and real-time data displays, while the cockpit is equipped with specialized avionics for precise navigation required by research flight patterns.

Scientific Instrumentation and Capabilities

The aircraft carries a versatile and configurable payload of remote sensing and in-situ instruments. Standard suites measure core parameters like temperature, humidity, and three-dimensional wind vectors using systems such as the NCAR GPS Dropsonde system. It frequently hosts advanced lidar systems from institutions like the NASA Langley Research Center and sophisticated spectrometers for tracing gases like carbon dioxide and ozone. This capability allows for detailed studies of atmospheric chemistry, cloud microphysics, and the transport of aerosols across vast distances, contributing directly to projects like the Atmospheric Tomography Mission.

Research Missions and Scientific Contributions

It has been deployed globally in over a dozen major international field campaigns, providing pivotal data for understanding climate change and air quality. Notable missions include the CONTRAST campaign over the western Pacific Ocean, which studied the oxidizing capacity of the remote atmosphere, and the ORACLES project investigating interactions between biomass burning aerosols and stratocumulus clouds off the coast of Namibia. Data collected have been instrumental in validating satellite observations from platforms like NASA's Aura and CALIPSO and have led to numerous publications in journals such as Science (journal) and the Journal of Geophysical Research.

Operations and Management

Day-to-day operations and maintenance are conducted by the NCAR Research Aviation Facility located at the Rocky Mountain Metropolitan Airport in Colorado. Flight requests are evaluated through a competitive proposal process managed by the National Science Foundation's Lower Atmosphere Observing Facilities. The aircraft is flown by a crew of specialized pilots and supported by a team of engineers and technicians from NCAR. Planning for missions involves close collaboration with principal investigators from universities worldwide, including University of Colorado Boulder, the Massachusetts Institute of Technology, and the University of Washington.

Category:Research aircraft Category:Atmospheric research Category:National Center for Atmospheric Research