2009 Perseids

*ZHR(Time axis)

　　CHR is obtained by subtracting the sporadic meteor from Count.
　　It is equal to CHR of the visual observation.
　　ZHR is obtained by correcting the elevation from CHR.
　　ZHR excludes the radiation point of 20 degrees or less.
　　ZHR excludes the time zone of zenith-effect.
　　The sporadic meteor is calculated from past data of 570 days.

The count is 9 radio observers' weighted averages.


The count is 4 radio observers' weighted averages.


The count is 4 radio observers' weighted averages.


The count is one radio observer's data.


The count is 3 radio observers' weighted averages.

*ZHR(Solar longitude)

*Address of thanks

　I used the data of each country. Thank you.

• Chris Steyaert, DIRK VAN_HESSCHE, Felix Verbelen, Willy Camps
• Andy Smith_G7IZU, Dave Swan, David Entwistle, John Wardle
• Mike Otte
• Glen Harris, Jeff Brower, Prince_George_Centre