Data Set Overview :  The Canadian Meteor Orbit Radar, (CMOR), located near Tavistock, Ontario and operated by the University of Western Ontario, carried out a survey of meteor showers over the period 2002-2006. A total of more than 2.5 million meteoroids were detected and their orbits determined over the course of the survey. From these data, 45 meteoroid streams were identified using a wavelet transform approach. Of the identified streams, 12 are previously unreported or unrecognized.  This data set presents the orbital parameters measured for the 45 major and minor meteor streams which were unambiguously detected during the survey, with multiple radar frequencies and using two distinct detection methodologies.  Parameters :  The list of the 45 detected meteor showers and their orbital elements, reproduced from Brown et al. (2008) Table 6, is included in the file browntab6.tab. For each of the detected meteor showers, the file contains orbital elements derived using deceleration-corrected velocities, raw mean velocities, and velocities determined from a hybrid-Fresnel technique. The range in orbital parameters as determined from these three methods provides a guide to the uncertainty of the measurements due to deceleration corrections alone.  Information about the radiants of each of the detected showers is provided in the file radiants.tab, extracted from Brown et al. (2008) Table 4. The file contains the solar longitude of the radiant at beginning, end, and maximum of the active period, the RA and dec of the radiant at the maximum of the shower, and the drift of RA and dec over the active period.  For a full description of the survey and derivations, and a discussion of the results, see the original paper, Brown et al. (2008).  Brown, P., R.J. Weryk, D.K. Wong, and J. Jones, A meteoroid stream survey using the Canadian Meteor Orbit Radar I. Methodology and radiant catalog, Icarus 195, 317-339, 2008.

Confidence Level Overview : This list of 45 meteor showers includes only those showers which were detected unambiguously in multiple years, with multiple radar frequencies, and using two distinct detection methodologies. Some other minor streams exist in the survey data, but only those with high confidence in their existence have been included in this published set.  The derivation of the orbital parameters has been carried out using deceleration-corrected velocities, raw mean velocities, and velocities determined from a hybrid-Fresnel technique. The range in orbital parameters as determined from these three methods provides a guide to the uncertainty of the measurements due to deceleration corrections alone.  For further discussion of the survey data and analysis, see Brown et al. (2008).