Find research datasets worth reusing

SASS (Subsonics Assessment) Ozone and NOx Experiment (SONEX) DC-8 In-Situ Meteorological and Navigation Data

SONEX_TraceGas_AircraftInSitu_DC8_Data_1 is the in-situ meteorological and navigation data collected onboard the DC-8 aircraft during the SASS (Subsonics Assessment) Ozone and NOx Experiment (SONEX) suborbital campaign. Data collection for this product is complete. The SASS (Subsonics Assessment) Ozone and NOx Experiment (SONEX) was an international, multi-organizational mission that took place in October-November 1997. NASA was the US sponsor of SONEX that partnered with POLINAT-2 (Pollution from Aircraft Emissions in the North Atlantic Flight Corridor) funded by the German DLR (Deutsches Zentrum für Luft- und Raumfahrt) or German Aerospace Agency. NASA flew the DC-8 aircraft out of NASA/Ames Research Center. DLR operated an instrumented Falcon 20 aircraft. The staging locations for NAFC sampling were primarily Bangor, Maine (US), and Shannon, Ireland. Subsonic aircraft emissions impact several aspects of atmospheric composition: nitrogen oxides (NOx), CO, and hydrocarbons from emissions can perturb upper tropospheric/lower stratospheric (UT/LS) ozone; water vapor, soot, and sulfur oxides (SOx) emitted by aircraft may perturb clouds and aerosols, changing UT/LS radiative forcing and global temperature. In SONEX and POLINAT, flights were conducted in the vicinity of the North Atlantic Flight Coordinator (NAFC) to observe the impact of aircraft emissions on NOx and ozone (O3). The DC-8 aircraft payload (Singh et al., 1999) primarily measured in-situ CO, CO2, hydrocarbons/halocarbons, O3, aerosols (Dibb et al., 2000), OH/HO2, water vapor, nitric acid (Talbot et al., 1999), photolysis rates, temperature, pressure, winds, NOx, and NOy. Three sampling approaches were implemented during SONEX. First, special meteorological (Fuelberg et al., 2000) were developed to allow targeted sampling for air parcels affected by aircraft emissions and various meteorological events, e.g., convection, lightning (Jeker et al., 2000), stratospheric intrusions (Cho et al., 2000). Second, because the NAFC had not been extensively sampled in the past, it was important for SONEX to characterize the climatology of trace species like CN (Wang et al., 2000), NOx and NOy (Koike et al., 2000). Third, tracers (Simpson et al., 2000; Thompson et al., 1999) and model sensitivity studies (Meijer et al., 2000) were employed for Air Mass Identification. This sampling strategy answered the following questions: Where and when are air masses found with the greatest aircraft influence? When and where was stratospheric air sampled? SONEX showed a substantial impact of aircraft emissions on UT/LS NOx and CN in the vicinity of fresh aircraft emissions. However, during October-November 1997 over the NAFC, UT/LS NOx was dominated by surface emissions redistributed by convection and augmented by lightning.

STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Fluxgate Magnetometer (MAG) Burst Mode, Magnetic Field Vector, Radial-Tangential-Normal (RTN) Coordinates, Level 1 (L1), 31 ms Data

This data product contains Level 1 0.03125-s or 32 Hz burst-mode values of solar wind magnetic field data measured by the IMPACT Magnetometer on STEREO-B in Radial-Tangential-Normal, RTN, coordinates.

STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) 3-Dimensional Electron Distributions, Level 1 (L1), 30 s Data

The file contains Level 1 3D electron distributions from the In-situ Measurements of Particles and CME Transients, IMPACT, SWEA instrument on the STEREO Behind spacecraft. For important usage caveats see https://cdaweb.gsfc.nasa.gov/stereo_swea_caveats.html.

STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) Pitch Angle Distribution, Level 2 (L2), 30 s Data in CDF format

STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) electron pitch angle distribution (PAD) in phase space density (in units of s^3/km^6) as a function of 12 pitch angle bins (centered at 7.5, 22.5, 37.5, 52.5, 67.5, 82.5, 97.5, 112.5, 127.5, 142.5, 157.5, 172.5 deg) and 10 variable energy bins (PAD values for energies < 50 eV are forced to fill values).

STEREO-B IMPACT (In-Situ Measurements of Particles and CME Transients) Low Energy Telescope (LET) 1-min Level 1 Ion Fluxes

The IMPACT Low Energy Telescope (LET) data consist of 1-min resolution unsectored fluxes and counts for each of 15 single-Z ionic species at each of a species-dependent number of energy bins ranging between 9 and 16, plus 16-sectored fluxes and counts for 5 ionic species or Z groups in one (H) or two (He4, CNO, NiMgSi, Fe) energy ranges. There is much fill data. (

STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Fluxgate Magnetometer (MAG) Burst Mode, Magnetic Field Vector, Radial-Tangential-Normal (RTN) Coordinates, Level 1 (L1), 31 ms Data

This data product contains Level 1 0.03125-s or 32 Hz burst-mode values of solar wind magnetic field data measured by the IMPACT Magnetometer on STEREO-A in Radial-Tangential-Normal, RTN, coordinates.

STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) 3-Dimensional Electron Distributions, Burst Mode, Level 1 (L1), 2 s Data

The file contains Level 1 3D electron distributions in burst mode from the In-situ Measurements of Particles and CME Transients, IMPACT, SWEA instrument on the STEREO Behind spacecraft. For important usage caveats see https://cdaweb.gsfc.nasa.gov/stereo_swea_caveats.html.

STEREO-A IMPACT (In-Situ Measurements of Particles and CME Transients) Suprathermal Ion Telescope (SIT) 1-min Level 1 Multi-Z Ion Spectra

The IMPACT Suprathermal Ion Telescope (SIT) data consist of 1-min resolution ion fluxes of the following species (and numbers of energy bands, typically spanning ~0.04-9 MeV/n): H(12), 3He(10), 4He(16), C(17), O(16), NeS(16; neon through sulfur), Fe(14), UH(6; ultra heavy; 0.06-0.5 MeV/n), and associated uncertainties due to counting statistics.

STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) Pitch Angle Distribution, Level 2 (L2), 30 s Data in CDF format

STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) electron pitch angle distribution (PAD) in phase space density (in units of s^3/km^6) as a function of 12 pitch angle bins (centered at 7.5, 22.5, 37.5, 52.5, 67.5, 82.5, 97.5, 112.5, 127.5, 142.5, 157.5, 172.5 deg) and 10 variable energy bins (PAD values for energies < 50 eV are forced to fill values).

STEREO-A IMPACT (In-Situ Measurements of Particles and CME Transients) Suprathermal Electron Telescope (STE) 10-s Level 1 Electron Spectra

The IMPACT Suprathermal Electron (STE) Telescope data consist of 10-sec resolution electron counts from each of 8 sensors in each of 32 energy bands that span 1.9 keV to 100 keV. Only four sensors provide unsaturated data that are scientifically usable.

restrictednotspecifiedMar 2025View details →

ACCLIP WB-57 Aircraft In-situ Trace Gas Data

ACCLIP_TraceGas_AircraftInSitu_WB57_Data is the in-situ trace gas data collection during the Asian Summer Monsoon Chemical & Climate Impact Project (ACCLIP). Data from the Airborne Carbon Oxide Sulfide Spectrometer (ACOS), Carbon monOxide Measurement from Ames (COMA), Laser Induced Fluorescence - Nitrogen Oxide (LIF-NO), In Situ Airborne Formaldehyde (ISAF), Carbon Oxide Laser Detector 2 (COLD 2), and the NOAA UAS O3 Photometer (UASO3) is featured in this collection. Data collection for this product is complete. ACCLIP is an international, multi-organizational suborbital campaign that aims to study aerosols and chemical transport that is associated with the Asian Summer Monsoon (ASM) in the Western Pacific region from 15 July 2022 to 31 August 2022. The ASM is the largest meteorological pattern in the Northern Hemisphere (NH) during the summer and is associated with persistent convection and large anticyclonic flow patterns in the upper troposphere and lower stratosphere (UTLS). This leads to significant enhancements in the UTLS of trace species that originate from pollution or biomass burning. Convection connected to the ASM occurs over South, Southeast, and East Asia, a region with complex and rapidly changing emissions due to its high population density and economic growth. Pollution that reaches the UTLS from this region can have significant effects on the climate and chemistry of the atmosphere, making it important to have an accurate representation and understanding of ASM transport, chemical, and microphysical processes for chemistry-climate models to characterize these interactions and for predicting future impacts on climate. The ACCLIP campaign is conducted by the National Aeronautics and Space Administration (NASA) and the National Center for Atmospheric Research (NCAR) with the primary goal of investigating the impacts of Asian gas and aerosol emissions on global chemistry and climate. The NASA WB-57 and NCAR G-V aircraft are outfitted with state-of-the-art sensors to accomplish this. ACCLIP seeks to address four scientific objectives related to its main goal. The first is to investigate the transport pathways of ASM uplifted air from inside of the anticyclone to the global UTLS. Another objective is to sample the chemical content of air processed in the ASM in order to quantify the role of the ASM in transporting chemically active species and short-lived climate forcing agents to the UTLS to determine their impact on stratospheric ozone chemistry and global climate. Third, information is obtained on aerosol size, mass, and chemical composition that is necessary for determining the radiative effects of the ASM to constrain models of aerosol formation and for contrasting the organic-rich ASM UTLS aerosol population with that of the background aerosols. Last, ACCLIP seeks to measure the water vapor distribution associated with the monsoon dynamical structure to evaluate transport across the tropopause and determine the role of the ASM in water vapor transport in the stratosphere.

STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) 3-Dimensional Electron Distributions, Burst Mode, Level 1 (L1), 2 s Data

The file contains Level 1 3D electron distributions in burst mode from the In-situ Measurements of Particles and CME Transients, IMPACT, SWEA instrument on the STEREO Ahead spacecraft. For important usage caveats see https://cdaweb.gsfc.nasa.gov/stereo_swea_caveats.html.

STEREO-A IMPACT (In-Situ Measurements of Particles and CME Transients) Low Energy Telescope (LET) 1-min Level 1 Ion Fluxes

MAVEN (Multiple Instrument Ensemble) In-situ Observations, Data Product Bundle, Key Parameter (KP), 4 s Data

The MAVEN In-situ Calibrated Level 2, L2, Science Data Bundle contains selected fully calibrated Data from the Neutral Gas and Ion Mass Spectrometer, NGIMS, Instrument and the Particles and Fields Package together with Ephemeris Information. The Particle and Fields In-situ Instrument Data are from the Extreme Ultraviolet, EUV, Langmuir Probe and Waves, LPW, Antenna, Magnetometer, MAG, Solar Energetic Particles, SEP, SupraThermal And Thermal Ion Composition, STATIC, Solar Wind Electron Analyzer, SWEA, and Solar Wind Ion Analyzer, SWIA, Instruments. All of these Data are in Physical Units and are averaged and/or sampled at a uniform 4 s Cadence. These In-situ Data are derived directly from the Level 2 Data. The Ephemeris Data are derived by using SPICE Libraries and Kernels provided by MAVEN Navigation, NAV, Team and Lockheed-Martin.

STEREO-B IMPACT (In-Situ Measurements of Particles and CME Transients) Suprathermal Electron Telescope (STE) 10-s Level 1 Electron Spectra

TRACE-P P-3B In-Situ Aerosol Data

TRACE-P_Aerosol_AircraftInSitu_P3B_Data is the in-situ aerosol data collected onboard the P-3B aircraft during the Transport and Chemical Evolution over the Pacific (TRACE-P) suborbital campaign. Data from the Chemical Ionization Mass Spectrometer (CIMS) and the Differential Absorption of CO, CH4, N2O Measurements (DACOM) instruments are featured in this collection. Data collection for this product is complete. The NASA TRACE-P mission was a part of NASA’s Global Tropospheric Experiment (GTE) – an assemblage of missions conducted from 1983-2001 with various research goals and objectives. TRACE-P was a multi-organizational campaign with NASA, the National Center for Atmospheric Research (NCAR), and several US universities. TRACE-P deployed its payloads in the Pacific between the months of March and April 2001 with the goal of studying the air chemistry emerging from Asia to the western Pacific. Along with this, TRACE-P had the objective studying the chemical evolution of the air as it moved away from Asia.  In order to accomplish its goals, the NASA DC-8 aircraft and NASA P-3B aircraft were deployed, each equipped with various instrumentation. TRACE-P also relied on ground sites, and satellites to collect data. The DC-8 aircraft was equipped with 19 instruments in total while the P-3B boasted 21 total instruments. Some instruments on the DC-8 include the Nephelometer, the GCMS, the Nitric Oxide Chemiluminescence, the Differential Absorption Lidar (DIAL), and the Dual Channel Collectors and Fluorometers, HPLC. The Nephelometer was utilized to gather data on various wavelengths including aerosol scattering (450, 550, 700nm), aerosol absorption (565nm), equivalent BC mass, and air density ratio. The GCMS was responsible for capturing a multitude of compounds in the atmosphere, some of which include CH4, CH3CHO, CH3Br, CH3Cl, CHBr3, and C2H6O. DIAL was used for a variety of measurements, some of which include aerosol wavelength dependence (1064/587nm), IR aerosol scattering ratio (1064nm), tropopause heights and ozone columns, visible aerosol scattering ratio, composite tropospheric ozone cross-sections, and visible aerosol depolarization. Finally, the Dual Channel Collectors and Fluorometers, HPLC collected data on H2O2, CH3OOH, and CH2O in the atmosphere. The P-3B aircraft was equipped with various instruments for TRACE-P, some of which include the MSA/CIMS, the Non-dispersive IR Spectrometer, the PILS-Ion Chromatograph, and the Condensation particle counter and Pulse Height Analysis (PHA). The MSA/CIMS measured OH, H2SO4, MSA, and HNO3. The Non-dispersive IR Spectrometer took measurements on CO2 in the atmosphere. The PILS-Ion Chromatograph recorded measurements of compounds and elements in the atmosphere, including sodium, calcium, potassium, magnesium, chloride, NH4, NO3, and SO4. Finally, the Condensation particle counter and PHA was used to gather data on total UCN, UCN 3-8nm, and UCN 3-4nm. Along with the aircrafts, ground stations measured air quality from China along with C2H2, C2H6, CO, and HCN. Finally, satellites imagery was used to collect a multitude of data, some of the uses were to observe the history of lightning flashes, SeaWiFS cloud imagery, 8-day exposure to TOMS aerosols, and SeaWiFS aerosol optical thickness. The imagery was used to best aid in planning for the aircraft deployment.

STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Fluxgate Magnetometer (MAG) Burst Mode, Magnetic Field Vector, Spacecraft (SC) Coordinates, Level 1 (L1), 31 ms Data

This data product contains Level 1 0.03125-s or 32 Hz burst-mode values of solar wind magnetic field data measured by the IMPACT Magnetometer on STEREO-A in Spacecraft, SC, coordinates.

STEREO-B IMPACT (In-Situ Measurements of Particles and CME Transients) Solar Electron Proton Telescope (SEPT) 1-min Level 1 Electron and Proton Spectra

The IMPACT Solar Electron Proton Telescope (SEPT) Level 1 data consist of electron and proton fluxes from each of 32 energy bands that span ~20 keV to 2000(electrons) or 7000(protons) keV. These spectra are determined each minute, in each of 4 directions with 60 deg fields of view (parallel and anti-parallel to the Parker magnetic field direction, and northward and southward from the ecliptic plane.

STEREO-B IMPACT (In-Situ Measurements of Particles and CME Transients) Suprathermal Ion Telescope (SIT)1-min Level 1 Multi-Z Ion Spectra

STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) 3-Dimensional Electron Distributions, Level 1 (L1), 30 s Data

The file contains Level 1 3D electron distributions from the In-situ Measurements of Particles and CME Transients, IMPACT, SWEA instrument on the STEREO Ahead spacecraft. For important usage caveats see https://cdaweb.gsfc.nasa.gov/stereo_swea_caveats.html.