2.3.2 spase://NASA/NumericalData/Weygand/Geotail/LEP/Propagated.LEP/GSM/PT60S Geotail Low Energy Particle (LEP) experiment data Weimer Propagated 60 s Resolution in GSM Coordinates Geotail LEP data https://doi.org/10.21978/p89s5d 2021-05-31T12:34:56.789 2021-05-31T12:34:56.789 Updated to SPASE Version 2.3.2 if needed, Applied quality control for DOI usage, LFB Geotail LEP Weimer propagated solar wind data and linearly interpolated to have the measurements on the minute at 60 s resolution data in GSM coordinates. This data set consists of propagated solar wind data that has first been propagated to a position just outside of the nominal bow shock (about 17, 0, 0 Re) and then linearly interpolated to 1 min resolution using the interp1.m function in MATLAB. The input data for this data set is a 1 min resolution processed solar wind data constructed by Dr. J.M. Weygand. The method of propagation is similar to the minimum variance technique and is outlined in Dan Weimer et al. [2003; 2004]. The basic method is to find the minimum variance direction of the magnetic field in the plane orthogonal to the mean magnetic field direction. This minimum variance direction is then dotted with the difference between final position vector minus the original position vector and the quantity is divided by the minimum variance dotted with the solar wind velocity vector, which gives the propagation time. This method does not work well for shocks and minimum variance directions with tilts greater than 70 degrees of the sun-earth line. This data set was originally constructed by Dr. J.M. Weygand for Prof. R.L. McPherron, who was the principle investigator of two National Science Foundation studies: GEM Grant ATM 02-1798 and a Space Weather Grant ATM 02-08501. These data were primarily used in superposed epoch studies References: Weimer, D. R. (2004), Correction to ‘‘Predicting interplanetary magnetic field (IMF) propagation delay times using the minimum variance technique,’’ J. Geophys. Res., 109, A12104, doi:10.1029/2004JA010691. Weimer, D.R., D.M. Ober, N.C. Maynard, M.R. Collier, D.J. McComas, N.F. Ness, C. W. Smith, and J. Watermann (2003), Predicting interplanetary magnetic field (IMF) propagation delay times using the minimum variance technique, J. Geophys. Res., 108, 1026, doi:10.1029/2002JA009405. Toshifumi Mukai;The Institute of Space and Astronautical Science Weygand, James M.; & McPherron, Robert L. 2006-01-01T00:00:00 University of California, Los Angeles spase://SMWG/Person/Toshifumi.Mukai PrincipalInvestigator spase://SMWG/Person/James.M.Weygand MetadataContact LEP experiment https://pwg.gsfc.nasa.gov/istp/geotail/geotail_inst.html LEP information LEP experiment https://www.stp.isas.jaxa.jp/geotail/QL/index.html LEP quicklook LEP experiment https://darts.isas.jaxa.jp/stp/geotail/caveats.html#lep LEP information Solar Wind Propagation Information http://www.igpp.ucla.edu/jweygand/htmls/Propagated_SW.html Solar wind archive at UCLA. This archive provides a list of available data resources and available time ranges. spase://VMO/NumericalData/Weygand/Geotail/LEP/Propagated.LEP/GSM/PT60S spase://VSPO/NumericalData/Geotail/CPI-MGF-LEP/PT1M spase://VSPO/NumericalData/Weygand/Geotail/LEP/Propagated.LEP/GSM/PT60S spase://SMWG/Repository/UCLA/VMO Online Open IGPP UCLA Geotail LEP Data JMW Processed Archive http://vmo.igpp.ucla.edu/data1/Weygand/PropagatedSolarWindGSM/weimer/Geotail/plasma/ Text ASCII Uncalibrated Geotail Low Energy Particle experiment Level-0 spase://SMWG/Instrument/Geotail/LEP ThermalPlasma 1993-10-01T00:00:00.000 -P1Y Time format in data files is: Day Month Year Hour Minute Second (DD MM YYYY HH MM SS.SSS) 1 min solar wind magnetotail bow shock magnetopause plasma data LEP Propagated solar wind data Geotail Universal Time Time Universal Time AFTER Propagation columns from left to right are: day month year hour minute sec in the format of dd mm yyyy hh mm ss. PT60S 6 Universal Time expressed using a 6-column day, month, year, hour, minute, second representation Day 1 Day Month 2 Month Year 3 Year Hour 4 Hour Minute 5 Minute Second 6 Second Temporal Geotail LEP Thermal Speed Weimer Propagated 1 min Resolution Data in GSM Coordiates Thermal Speed Weimer propagated Geotail LEP thermal speed in GSM coordinates in units of km/s. Be sure you understand the instrument PT60S KM/S Ion ThermalSpeed Geotail LEP Density Weimer Propagated 1 min Resolution Data in GSM Coordiates Density Weimer propagated density data for Geotail LEP in GSM coordinates in units of number per cubic centimeter. PT60S #/cm^-3 Ion NumberDensity Geotail LEP Velocity Vector Weimer Propagated 1 min Resolution Data in GSM Coordiates Velocity Vectors Weimer propagated Flow vector for Geotail LEP in GSM coordinates in units of km/s. Be sure you understand the instrument PT60S KM/S Cartesian GSM 3 VX-GSM Component.I 1 pvxgse VY-GSM Component.J 2 pvygse VZ-GSM Component.K 3 pvzgse Ion Velocity Geotail Spacecraft Weimer Propagated Position Vector Interpolated to 1 min Resolution in GSM Coordiates Position Vectors Weimer propagated location of the spacecraft in GSM coordinates in units of Re. PT60S Re Cartesian GSM 3 X-GSM Component.I 1 pxgse Y-GSM Component.J 2 pygse Z-GSM Component.K 3 pzgse Positional