############################################################################### For meteor_shower_data.csv ############################################################################### *meteor_shower_data.csv: contains the complete breakdown per meteor shower, including duration distribution The columns represent the following: IAU_code Three-letter IAU shower code. Sporadic meteors have a code "..." shower_name Full shower name, based on IAU data (https://www.ta3.sk/IAUC22DB/MDC2022/Roje/roje_lista.php) total_count Total number of meteors we observed associated with a shower deep_count Number of meteors that terminated below 93.5 km total_PTs Total number of PTs associated with a shower (only includes trains >1 minutes) less_1_min Number of short duration trains lasting less than 1 minute 1_2_min Number of PTs lasting between 1 and 2 minutes 1_2_min_obs Number of PTs lasting at least 1 minute, but which were obscured before their natural end (other bins also have a corresponding column for this) 2_5_min Number of PTs lasting between 2 and 5 minutes 5_10_min Number of PTs lasting between 5 and 10 minutes 10_15_min Number of PTs lasting between 10 and 15 minutes more_15_min Number of PTs lasting at least 15 minutes Vavg Average of all meteor average velocities associated with a shower [km/s] ############################################################################### For PT_altitudes.csv ############################################################################### *PT_altitudes.csv: contains the altitudes (+errors) for the subset of PT-leaving meteors analyzed altitudinally The columns represent the following: (GMN-derived values are denoted as (GMN)) Unique_trajectory (GMN) A 20-character string containing the beginning time (rounded to seconds) and a truncated MD5 hash encoding the trajectory position Event_id Our unique label, format: MJD_UTChour_frameInHour_objectLabel. Corresponds to data filename ptBegHt Beginning height of the PT (above the WGS84 ellipsoid) [km] ptBegHt_err Astrometric error associated with the PT's beginning height [km] ptEndHt Ending height of the PT (above the WGS84 ellipsoid) [km] ptEndHt_err Astrometric error associated with the PT's ending height [km] meteorBegHt (GMN) Begin height of the meteor (above the WGS84 ellipsoid) [km] meteorEndHt (GMN) End height of the meteor (above the WGS84 ellipsoid) [km] meteorPeakHt (GMN) Height at which the peak magnitude occurred [km] PT_min_duration Lower boundary of PT duration [minutes] PT_max_duration Upper boundary of PT duration; a value of 99 means the PT exceeded the last duration bin (15 minutes) [minutes] PT_obscured Whether the PT was obscured before it naturally ended [boolean] ############################################################################### For nonPT_meteors.csv and PT_meteors.csv ############################################################################### *nonPT_meteors.csv: data for meteors that were NOT observed to produce a train *PT_meteors.csv: data for the meteors that did produce a train Most of the data used in nonPT_meteors.csv and PT_meteors.csv comes directly from the GMN; these columns retain their original meanings (found at: https://globalmeteornetwork.org/data/media/GMN_orbit_data_columns.pdf) though column names are in some cases changed for convenience. The above document is reproduced here for convenience: (The columns we added are denoted with a '*') Unique_trajectory A 20-character string containing the beginning time (rounded to seconds) and a truncated MD5 hash encoding the trajectory position MJD *The Modified Julian Date of the meteor Beginning_JD Julian date of the beginning of the meteor Beginning_UTC UTC time of the beginning of the meteor Unix *Unix timestamp for the frame containing the meteor, from the WiPT2 camera IAU_no IAU shower number, see https://www.ta3.sk/IAUC22DB/MDC2022/Roje/roje_lista.php. Sporadic meteors have a code -1 IAU_code Three-letter IAU shower code. Sporadic meteors have a code "..." Sol_lon Solar longitude of the beginning of the meteor [deg] App_LST Apparent local sidereal time of the beginning of the meteor [deg] RAgeo Geocentric right ascension in the J2000 epoch [deg] RAgeo_err One sigma error (all subsequent values with reported one sigma errors follow the same *_err format) DECgeo Geocentric declination in the J2000 epoch [deg] LAMgeo Geocentric ecliptic longitude in the J2000 epoch [deg] BETgeo Geocentric ecliptic latitude in the J2000 epoch [deg] Vgeo Geocentric velocity [km/s] LAMhel Heliocentric ecliptic longitude in the J2000 epoch [deg] BEThel Heliocentric ecliptic latitude in the J2000 epoch [deg] Vhel Heliocentric velocity [km/s] a Semi-major axis [AU] e Eccentricity i Inclination [deg] peri Argument of perihelion [deg] node Ascending node [deg] Pi Longitude of perihelion [deg] b Latitude of perihelion [deg] q Perihelion distance [AU] f True anomaly at the beginning of the meteor [deg] M Mean anomaly [deg] Q Aphelion distance [AU] n Mean motion in the orbit [deg/day] T Orbital period [year] TisserandJ Tisserand's parameter with respect to Jupiter RAapp Apparent ground-fixed radiant right ascension in the epoch of date [deg] DECapp Apparent ground-fixed radiant declination in the epoch of date [deg] Azim_posE Apparent ground-fixed radiant azimuth (+east of due north convention) [deg] Elev Apparent ground-fixed radiant elevation (i.e. entry angle) [deg] Vinit Apparent ground-fixed initial velocity [km/s] Vavg Apparent ground-fixed average velocity [km/s] LatBeg Latitude of the beginning of the meteor [deg] LonBeg Longitude of the beginning of the meteor [deg] HtBeg Begin height of the meteor (above the WGS84 ellipsoid) [km] LatEnd Latitude of the meteor end [deg] LonEnd Longitude of the meteor end [deg] HtEnd End height of the meteor (above the WGS84 ellipsoid) [km] Duration Observed meteor duration [s] Peak Peak magnitude normalized to the range of 100km Peak_Ht Height at which the peak magnitude occurred [km] F The F parameter defined as (HtBeg-PeakHt)/(HtBeg-HtEnd) Mass_kg Mass computed with a dimensionless luminous efficiency of 0.7% [kg] Qc Maximum convergence angle between all stations that observed the meteor [deg] MedianFitErr Median angular trajectory fit errors [arcsec] Beg_in Beginning of the meteor observed by at least one camera [boolean] End_in Ending of the meteor observed by at least one camera [boolean] Num Number of stations which observed the meteor Participating Station codes of the stations which observed the meteor Event_id *Our unique label, format: MJD_UTChour_frameInHour_objectLabel. Corresponds to data filename (only provided for PT_meteors.csv) PT_min_duration *Lower boundary of PT duration [minutes] (only provided for PT_meteors.csv) PT_max_duration *Upper boundary of PT duration; a value of 99 means the PT exceeded the last duration bin (15 minutes) [minutes] (only provided for PT_meteors.csv) PT_obscured *Whether the PT was obscured before it naturally ended [boolean] (only provided for PT_meteors.csv)