Ongoing Meteor Head Echo Surveys on the Northern and Southern Hemispheres

Radar observations of meteor head echoes provide information about the sizes, orbital elements, and atmospheric interactions of microgram-sized dust particles entering Earth's atmosphere. Head echoes observed using MST radars enable the detection of meteoroids with masses of approximately $10^{-10} - 10^{-8}$
kg—a mass range that contributes significantly to the meteoric mass influx into Earth's atmosphere. This work presents an ongoing effort to create a catalog with over one million high-quality meteor head echoes with continuous observations made using the Middle Atmosphere ALOMAR Radar System (MAARSY) and the Program of the Antarctic Syowa MST/IS (PANSY) radars, located at 69°N and 69°S, respectively. The MAARSY catalog contains 1.6 million events, while the PANSY radar contributes an additional 0.5 million. The catalog includes data on atmospheric trajectories, Doppler shifts, and radar cross-section estimates for each meteor. Keplerian orbital elements are computed using the REBOUND numerical propagator, which is employed to remove the influence of the Earth-Moon system prior to atmospheric entry. A search for interstellar meteors provides 75 candidates. The catalogue contains meteors associated with most of the established showers, with some clusters that are not associated with any established shower. Meteors associated with multiple showers show mass dependent dispersion that is consistent with the Poynting-Robertson effect. This catalog can be used to e.g., study the distribution of micrometeoroids on Earth-crossing orbits, to analyze the atmospheric entry dynamics of meteoroids, and to study the Earth's atmosphere.