2.4.0 spase://CNES/NumericalData/CDPP-Archive/Wind/WAVES/WIND_WAVES_RAD1_L3A Wind Waves RAD1_L3A : Direction Finding Data (Unpolarized Source Assumption) https://doi.org/10.24400/802406/mbdb-0ep4 2022-09-01T16:55:14Z This data set contains Wind Waves RAD1 direction-finding data. Direction-finding inversion method has been applied on RAD1_L2 high resolution data to derive characteristics of radio emissions. The method is based on the work by Manning and Fainberg, Space Science Instrumentation, 1980. It returns the absolute flux density (in W/m^2/Hz) of the radio source, as well as the azimuth, and the elevation angles (in degrees) in a RTN reference frame centered on the Wind spacecraft. The method is only valid under the following criteria: * Radio source is unpolarized * Radio source has an uniform brightness * Radio source signal remains constant at a given frequency over a spacecraft rotation (~3sec) * Short antenna dipole assumption is valid * Z axial antenna is not tilted Absolute flux density is calibrated using radio galaxy method (see Zaslavsky et al., 2011. DOI 10.1029/2010RS004464). Caveat: Level 3 df data are computed with the following assumptions : (i) incoming wave properties do not change during a spacecraft rotation (~3 seconds)parameter set, (ii) radio sources are unpolarized (U=V=Q=0), (iii) galaxy radio emission is not subtracted, (iv) radio sources have an uniform brightness distribution, (v) Z antennas are not tilted Data provided are publicly available. If used in presentations or publications, please acknowledge Wind/Waves Investigation (K. Issautier and K. Goetz). We recommend the data users to contact the Wind/Waves team early in their study. For reporting purposes, we request bibliography information for any publication, etc., using these data. Please send information on the use of this data to: K. Issautier (PI). We suggest to add the following lines into the acknowledgments: The authors acknowledge CNES (Centre National d'Etudes Spatiales), CNRS (Centre National de la Recherche Scientifique), and Observatoire de Paris for support to the Wind/Waves team and the CDPP (Centre de Données de la Physique des Plasmas) for the provision of the Wind/Waves data. The following paper should also be used to reference: Bougeret et al, Space Science Reviews, 1995, doi: 10.1007/BF00751331 spase://CNES/Person/CDPP-Archive/Karine.Issautier PrincipalInvestigator spase://CNES/Person/CDPP-Archive/Keith.Goetz PrincipalInvestigator spase://CNES/Person/CDPP-Archive/Lynn.B.Wilson.III ProjectScientist spase://CNES/Person/CDPP-Archive/Xavier.Bonnin DataProducer spase://CNES/Person/CDPP-Archive/CDPP.general.contact GeneralContact spase://CNES/Repository/CDPP-Archive/REGARDS-CDPP Online REGARDS https://regards.cnes.fr/user/cdpp/modules/1777?sp=DatasetName;q=DatasetName:WIND_WAVES_RAD1_L3A Access via CNES Data Archive for CDPP CDF Calibrated 3 spase://CNES/Instrument/CDPP-Archive/Wind/WAVES Waves.Passive Spectrum 1994-11-10T00:00:00Z 2022-02-28T00:00:00Z Heliosphere.NearEarth Sequential sweep number Sequential sweep number in the file, starting from the first sweep of the current day Other Frequency Frequency of analysis kHz 1e3>Hz Other Sequential number in parent L2 data file Sequential number in parent L2 data file Other Flux density Absolute flux density measured at the antennas (receiver background removed) : Stokes parameter I W/m^2/Hz PlasmaWaves StokesParameters Wave vector elevation Elevation of the wave vector in the RTN reference frame centered on Wind spacecraft degree 0.0174532925>rad DirectionAngle.ElevationAngle Orientation Wave vector azimuth Azimuth of the wave vector in the RTN reference frame centered on Wind spacecraft degree 0.0174532925>rad DirectionAngle.AzimuthAngle Orientation Radio source angular radius Radio source angular radius, assuming an uniform brightness distribution. degree 0.0174532925>rad Other Signal modulation rate Signal modulation rate Other