Leonids 1998: Observational Results!
Sino-Dutch Leonid Expedition 1998
Team "XINGLONG": Radio Results
Leonids 1998 Observer : Eisse Pieter (Peter) Bus Location : Lin Ting Kou, P.R. China (117 degrees 30.3'E, 39 degrees 37.8'N) 85 km south of the Xinglong Observatory of Beijing Astronomical Observatory Frequency : 96.7 MHz Transmitter Location : Zhengzhou, P.R. China, (114 degrees 55' E, 34 degrees 50' N), distance 581 km. Antenna : Dipole, geographical azimuth 204 degrees (WSW), elevation 17 degrees. Receiver : Sony ICF-SW7600 commercial receiver, sensitivity 0.8 uV. Observation Method : Listening and counting in 5-minute intervals. Long lasting reflections > 1 sec on 16/17 november 1998. Between 15h30m and 16h20m UT 10 long lasting reflections were observed. After about 16h20m UT until about 3h20m UT almost completely saturation of the signals occured. Therefore no individual reflections were counted during this period. Between 3h20m UT and 4h UT 21 long lasting reflections >1 sec were observed. On 4h UT the observations were ended. Long lasting reflections > 1 sec on 17 november 1998. Uncorrected hour rates starting at UT: 15h 16h 17h 18h 19h 20h 21h ---------------------------------- 4 5 6 4 6 4 3 Notes: Preliminary analysis for 16/17 November shows a flat high activity for about 20 hours with no distinguish peak. This activity is almost the same as observed with Radar in 1965. On November 17, also no distinguish peak is observed. For mid-point of the transmitter-receiver path counts: Radiant is rising on November 17 at about 15h30m UT. Radiant is setting on November 17 at about 05h50m UT. Most favourable antenna-geometry for detecting Leonids between 1h and 4h UT and between 17h30m and 21h30m UT. Unfavourable antenna-geometry between 22h and 0h30m UT. Peter Bus
|This page was last modified on November 27, 1998 by
Casper ter Kuile, Marco Langbroek and Hans Betlem