The catalogue of meteor orbits from the NFC systems is created by using the software UFO Orbit v2.41. In the program UFO Orbit v2.41, all combinations of meteors in a time interval dt = 3 s are created. For these combinations, the level Q0 is set and some other additional conditions also have to be set:

• dur > 0.08 s (duration of the meteor)
• dt < 3 s (maximum time difference between 2 stations)
• GD < 10 km (minimum ground distance between 2 stations)
• Gm% > −100% (overlap of a meteor sighting from two stations)
• 15 km < H1 < 200 km (beginning height)
• H2 < 200 km (terminal height)
• dV < 4 km/s (the largest difference in velocity between stations considered to compute the orbit)

NFC DATABASE STATISTICS
YEAR SINGLE METEORS PAIRED METEORS RAW ORBITS STATIONS/ORBIT PAIRING EFFICIENCY (%) NFC ORBITS REDUCTION (%)
2014 54 28 14 2.000 51.85 12 85.71
2015 4 324 1 776 888 2.000 41.07 526 59.23
2016 6 517 2 322 1 161 2.000 35.63 696 59.94
OVERALL  10 895 4 126 2 063 2.000 37.87 1 234 59.82

The single-station meteor statistics from the individual stations using the NFC system. The pairs are made up of stations as follows: Kroměříž (CZ) + Valašské Meziříčí (CZ), Zákopčie (SK) + Kysucké Nové Mesto (SK) and Senec (SK) + Blahová (SK).

NFC STATIONS STATISTICS
YEAR KROMĚŘÍŽ VALAŠSKÉ MEZIŘÍČÍ ZÁKOPČIE KYSUCKÉ NOVÉ MESTO SENEC BLAHOVÁ OVERALL
2014 29 25 0 0 0 0 54
2015 1 306 987 726 581 321 403 4 324
2016 1 076 1 006 762 613 1 381 1 679 6 517
OVERALL  2 411 2 018 1 488 1 194 1 702 2 082 10 895

The NFC orbit database (created according to Koukal et al. 2015) contains orbital elements and geophysical data of 1 234 meteors from 2014 to 2016 (latest update 30.1.2018). The database is saved in csv format and contains the data of all unified orbits within the given criteria.

RECENT NFC DATABASE TO DOWNLOAD
YEAR 2D GROUNDMAP DATABASE CSV FILE
2014 U2_2014
2015 U2_2015
2016 U2_2016