DMS-members observing the Perseids 2001
Marco Langbroek : Impressions of a rainy Perseids max in the Netherlands Koen MiskotteKoen Miskotte: Impressions of a rainy day Rijk-Jan Koppejan : Impressions of Perseids 2001 Ton Schoenmaker : Forward Scatter Perseids 2001
Last updated: 16 august 2001
Impressions: observers clouded out in the Netherlands
No Perseids for us here in the Netherlands. Last night clouded out except for a few lucky guys in the south. At the moment, it is raining. H2O of course.
Impressions: rainy Holland, sunny France
In the Netherlands (Waterlands....)
We almost every year loses...
The last time we had clear Perseid maxima was in 1997...
Sometimes it is hard...
Some years you win, some years you lose.... this year we got rained out! (in Philly)
Impressions: Perseids in Oostkappelle
Stream Perseid Constellation Cepheus Date Saturday, august 11 2001 Time 23:03 UT Camera ? Lens ? Diafragma ? Film ? Exposure ? Developer ? Fix ?
Forward Scatter Meteor Observations of Perseids 2001
Observer: Ton Schoenmaker Location: Roden, Netherlands (06º26'E, 53º08'N) Frequency: 60.500 MHz Transmitter: French TV channel L3 (video); transmitter in Carcassonne (100 kW), distance ~1150 km Antenna: 3-elements horizontal Cushcraft 50 MHz Yagi tuned to 55 MHz; geographical azimuth 195 degrees (SSW) Receiver: Yupiteru MVT-9000 in USB mode; sensitivity 0.5 uV at 12 dB S/N Observing: 800 Hz audio signal from earphone socket was rectified, digitised and fed into a PC via the parallel computer port. HP VEE was used to process the digitised signal and to store 15-minutes counts of reflections stronger than 0.22 uV (-120 dBm). Also for all individual meteors date, time, duration (dead time) and maximum signal are stored.
The results of the observations are shown in the figure. The dead time corrected counts per hour are plotted in red, the dead time = reflection time percentages in blue. The observations of August 10 are typical for the daily activity of sporadic meteors. The following days counts and dead time were above the sporadic level showing a Perseid maximum on 12 August 2001 about 12h UTC. Due to pointing of the antenna (about SSW), observability for the Perseids was low around 5h30m and 19h30m, and high around 1h45m and 8h30m UTC. The data in the figure are not corrected for the observability function. A few observations from periods with continuous reception (due to enhanced propagation like tropo, sporadic-E) have been removed.
Ton Schoenmaker, Dutch Meteor Society and IMO
Meester Homanstraat 8, NL 9301 HP Roden, Netherlands
|This page was last modified on August 16, 2001 by
Carl Johannink and Casper ter Kuile