23 Works

Water Vapor Differential Absorption Lidar

& Montana State University
The lidar groups at NCAR and Montana State University have worked together to develop a compact, field-deployable, micro-pulse DIAL. The instrument provides continuous monitoring of water vapor in the lower troposphere at 150 m range resolution and 1-5 min temporal resolution from 300 m to 4 km above ground level in daytime operation with greater range at night.

HIAPER Cloud Radar (HCR)

The HIAPER cloud radar (HCR) is an airborne, polarimetric, millimeter-wavelength radar that will serve the atmospheric science community by providing cloud remote sensing capabilities to the NSF/NCAR G-V (HIAPER) aircraft.

NCAR GPS Advanced Upper-Air Sounding System (GAUS)

GAUS is a balloon-borne rawinsonde sounding system. Through GPS technology, the GAUS measures high vertical resolution of temperature, humidity and winds at locations around the world. Each system includes a meteorological observing station to record thermodynamic data at the surface and the infrastructure to provide local data processing, display and communications. Data from GAUS can be transferred by phone, Internet or the Global Telecommunication System (GTS) to scientists at universities, other research institutions and operational...

Three-View Cloud Particle Imager (3V-CPI) for HIAPER

Paul Lawson &
The Three-View Cloud Particle Imager (3V-CPI) is a combination of three imaging instruments. Two of them comprise a 2D-S instrument, in which two 2D probes image particles as they pass through beams that are oriented orthogonally to each other and the airflow. If particles also lie in the intersection of the sensitive areas of the two beams, they are seen by both 2D probes. In that case, the CPI is triggered to take a high-resolution...

GNSS Instrument System for Multi-static and Occultation Sensing (GISMOS) for HIAPER

James Garrison, Jennifer Haase &
The Purdue GPS multistatic and occultation instrument for atmospheric, land, and ocean remote sensing (GISMOS) is an instrument to measure the water vapor distribution in the troposphere by inversion of the bending angle profile produced during occultation of a GPS satellite by the limb of the Earth. The instrument also uses GPS signals reflected from land or ocean to determine properties of those surfaces (soil moisture and surface roughness, respectively). Occultation samples represent distances of...

Time-of-Flight Aerosol Mass Spectrometer (ToF-AMS) for HIAPER

Jose Jimenez &
This is a version of the Aerodyname Aerosol Mass Spectrometer (AMS), with time-of-flight (TOF) capability, built and certified for operation on the NSF/NCAR GV (HIAPER). It is based on the original quadrupole design, but the addition of TOF capability increases the sensitivity and time (hence spatial) resolution and enables characterization of single particles. The basic measurement is size-resolved determination of the chemical composition of sub-micrometer non-refractory particles with spatial resolution typically less than 1 km.

Autonomous Airborne Ozone Photometer for HIAPER

W. Terry Rawlins, Michael Proffitt &
The HIAPER GV dual-beam, ultraviolet absorption ozone photometer is designed to measure atmospheric ozone mixing ratios in flight by ultraviolet absorption of a flowing air sample in a dual-beam, temperature-controlled sample cell. It is configured for either autonomous or interactive operation within the cabin of the HIAPER GV aircraft. Graphical user interface software provides real-time and post-flight data processing and analysis capabilities for rapid data evaluation and archival. The instrument has been fully inte grated...

S-PolKa: S-band/Ka-band Dual Polarization, Dual Wavelength Doppler Radar

NCAR/EOL's S-PolKa radar is an advanced, transportable, ground-based dual-polarimetric, dual-wavelength, Doppler weather radar. S-PolKa transmits 10 cm wavelength (S-band) and 0.86 cm wavelength (Ka-band) simultaneously with matched beamwidths and range resolution. The dual-polarimetric capabilities of S-PolKa lead to improved precipitation estimates over what is available on conventional radars, as well as real-time identification of hydrometeor types. The absolute phase measurements from S-PolKa can be used to compute and monitor in real time the low-level humidity...

Trace Organic Gas Analyzer (TOGA) for HIAPER

Eric Apel &
TOGA is a fast gas chromatograph combined with a mass spectrometer (MS). TOGA provides atmospheric mixing ratios of an extensive and growing list of compounds, nearly any organic species in the C2-C10 molecular structure range. The list includes alkanes, alkenes, alkynes, chlorofluorocarbons, halons, plus reactive oxygenated species such as alcohols, ketones, esters, and acids. Typically, a subset of some 40 different trace gases are measured, all at sensitivity to levels that occur in the atmosphere.

High Spectral Resolution Lidar for the Gulfstream-V; G5-HSRL

The National Center for Atmospheric Research (NCAR) operates and maintains a High Spectral Resolution Lidar (HSRL) system that can be deployed on the National Science Foundation's Gulfstream-V (G5) aircraft or in a customized shipping container. The Gulfstream-V High Spectral Resolution Lidar (G5-HSRL) is an eye-safe calibrated lidar system that can measure back scatter cross section, extinction and depolarization properties of atmospheric aerosols and clouds. The HSRL can also be used to detect the presence of...

NSF/NCAR Hercules C130 Aircraft

The C-130 is a versatile and capable research platform that carries a wide variety of scientific payloads. The C-130 has a 10-hour flight endurance, a 2,900 nautical mile range at up to 27,000 ft, and a payload capacity of up to 13,000 lbs. In addition to standard thermodynamic, microphysics and radiation sensors, the C-130 has a roomy fuselage payload area (414 ft2) and many versatile inlets and optical ports. The aircraft carries instruments and sensors...

NCAR Airborne Vertical Atmospheric Profiling System (AVAPS)

The NCAR Airborne Vertical Atmospheric Profiling System (AVAPS) is a key atmospheric instrument that measures vertical profiles of ambient temperature, pressure, humidity, wind speed and wind direction. Though initially developed to aid in hurricane landfall forcasting, variations of the system have successfully been used to study hurricane, mountian rotors, severe storms, the Antarctica continental weather, and many other events of scientific interest.

Quantum Cascade Laser Spectrometer for HIAPER

Steven Wofsy &
There are two separate components to this instrument, both using quantum-cascade tunable infrared laser differential absorption spectroscopy. One module measures CO2 with an accuracy of 0.1 ppm and a time response of one second. The second measures CO, CH4, and N2O, also with the response time of one second. The two instruments share a single aircraft rack. The instrument uses an infrared tunable quantum cascade laser. Detection is via a compact long-path cell. Two lasers...

NCAR Integrated Surface Flux System (ISFS)

The Integrated Surface Flux System (ISFS) is designed to study exchange processes between the atmosphere and Earth's surface. ISFS combines the capabilities of a network of surface weather stations with the ability to support intensive micrometeorological research at a single site. Investigators can configure ISFS resources to match the research objectives of each field project.

Small Ice Detector, version 2 for HIAPER (SID2H)

Andy Heymsfield &
SID2H is a single-particle optical forward-scattering particle detection system. It measures the light that cloud particles scatter onto 28-segment photo-multiplier detectors. The sample area is defined by two separate, overlapping optical paths. The timing and 28 scattering amplitudes are recorded for each particle. Real-time software provides temporal estimates of the particle concentration (#/cc) and scattering amplitude. The particle size range is ~2 to 60 um diameter. Post-flight software is available for more detailed study of...


The NSF/NCAR Gulfstream-V High-performance Instrumented Airborne Platform for Environmental Research (GV HIAPER) aircraft is a cutting-edge observational platform that meets the scientific needs of researchers who study many different aspects of the earth's environment, such as atmospheric Chemistry and Climate, Chemical Cycles, Clouds and Aerosols, Solar and Terrestrial Radiative Fluxes, Upper Troposphere Lower Stratosphere Processes, Mountain Waves and Turbulence, Air Quality, and Mesoscale Weather.

Vertical Cavity Surface-Emitting Laser (VCSEL) Hygrometer

The VCSEL hygrometer employs tunable diode laser absorption spectroscopy to determine the water vapor number density over a dew-point range of -90 to +30ยบ C. It reports the water vapor number density and approximate dew-point at 25 samples per second. It is mounted on a GV aperture plate, weighs 3.2 kg and draws less than 20W from 120 VAC, 60 Hz. The hygrometer operates in two absorption modes on two wavelengths: wavelength modulation on a...

Advanced Whole Air Sampler (AWAS) for HIAPER

Elliot Atlas &
The Advanced Whole Air Sampler (AWAS) is an instrument for the collection of gas samples in canisters where the sample can be preserved for subsequent analysis using ground-based laboratory equipment. Samples can be collected on the command of an operator, and banks of canisters provide for multiple samples in one flight.

Microwave Termperature Profiler (MTP) for HIAPER

Michael J. Mahoney &
MTP measures thermal emission from oxygen molecules between 56 and 59 GHz. A statistical method is used to retrieve the physical temperature profile above, below and at flight level. MTP is a scanning radiometer that observes emitted radiance (brightness temperature) at 56.363 GHz, 57.612 GHz, 58.363 GHz. It collects measurements at 10 viewing angles between +/- 80 degrees from horizontal. It is housed in a PMS canister with a modified fairing which has a transparent...

Nitric Oxide Chemiluminescence Ozone Instrument for HIAPER

Teresa Campos, Frank Flocke &
The airborne fastresponse ozone instrument was developed for use onboard the new NSF/NCAR Gulfstream V Highperformance Instrumented Airborne Platform for Environmental Research (HIAPER) research aircraft. HIAPER, with a roughly 15 km operational ceiling and a nominal air speed of 200 m/s, provides a new tool for characterization of a large and in some cases an under sampled region of the upper troposphere and lower stratosphere (UT/LS). The new instrument is designed to meet the needs...

NCAR Integrated Sounding System (ISS)

The Integrated Sounding Systems (ISS) is a self contained meteorological observing system at the Earth Observing Laboratory of the National Center for Atmospheric Research. The ISS combines surface, sounding, and remote sensing instrumentation to provide a comprehensive description of lower atmospheric thermodynamics and winds.

HIAPER Airborne Radiation Package (HARP)

Rick Shetter, Samuel Hall &
The H ARP instrument package consists of six spectrometers for the measurement of actinic flux and spectral irradiance. Each spectrometer is contr olled with a PC - 104 based Data - Sampling - Module ( DSM ) with wiring specific for each type of spectrometer.

Georgia Tech Chemical Ionization Mass Spectrometer (GT CIMS) for HIAPER

Lewis Gregory Huey, Frank Flocke &
A chemical ionization mass spectrometer (CIMS) capable of measurements in two basic configurations has been constructed for the HIAPER platform. In CIMS the target molecule is ionized via an ion-molecule reaction with a reagent ion and selectively detected with a mass spectrometer. The HIAPER CIMS is designed to operate in either negative or positive ion mode, allowing trace gases with affinities for forming either type of ions to be detected. In its most common configuration...

Registration Year

  • 2017
  • 2015

Resource Types

  • Physical Object