|Network of stations for automatic meteor detection|
A network was created to obtain the exact orbital elements of meteoroids. Registration of meteors is conducted using closed-circuit television (CCTV) cameras. Electro-optical converters have not been used. Trial observations were conducted in 2011-2012. The network consisting of six optical telescopes, equipped with WAT-902H2 cameras, was in operation in 2013-2016. Parameters of objectives and CCTV cameras are given in the table.
CCTV cameras operate in the interlaced scanning mode with a frequency of 50 semi-frames per second. This mode allows us to obtain a higher temporal resolution. Observations were conducted in a fully automatic mode using software for real-time meteor detection. The software was developed in the RI "MAO".
A combined observation method has been used to record meteors. To synchronize time readings between the base stations, we made use of a pulse per second signal, generated with Resolution-T receivers of the Global Positioning System (GPS). The synchronization accuracy between the base stations is not worse than 10-4 s.
In 2017, the telescopes were equipped with new objectives. The network consists of eight telescopes.Parameters of objective and CCTV camera are given in the table.
Observations are carried out using main station at the RI «MAO» and two base stations at distances of 11.8 km and 100 km from the observatory. Two stations are situated in Mykolaiv, and one station is located in Odesa.
Coordinates of the station at the RI «MAO», named SAC:
latitude 46.971594°, longitude 31.973039°, altitude 71.0 m.
Coordinates of the base station, named BAS, at a distance of 11.8 km from the RI «MAO»:
latitude 46.871598°, longitude 32.018309°, altitude 50.0 m.
Results of double-station observations in 2013-2016
Number of detected meteors is 8908.
Number of simultaneously detected meteors is 1148.
Number of precise meteor trajectories is 310.
Fig. 1. Mean number of meteors per day obtained in 2013-2016.
Fig. 2. Radiants of 310 meteors obtained in 2013-2016.
Tables of parameters of meteor trajectories, obtained with single station observations: