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Graphs of Activity Level every month

Using data published by RMOJ and Radio Meteor Observation Bulletin, "Activity Level index" every month in each region were calculated.

Graphs of combined result and each observing station

2017 Japanese stations Activity Level in Asia Activity Level in Europe Activity Level in North America Activity Level in South America
2016 Japanese stations Activity Level in Asia
2015 Japanese stations Activity Level in Asia
2014 Japanese stations Activity Level in Asia
2013 Japanese stations Activity Level in Asia
2012 Japanese stations Activity Level in Asia
2011 Japanese stations Activity Level in Asia
2010 Japanese stations Activity Level in Asia
2009 Japanese stations Activity Level in Asia
2008 Japanese stations Activity Level in Asia
2007 Japanese stations Activity Level in Asia
2006 Japanese stations Activity Level in Asia
2005 Japanese stations
2004 Japanese stations
2003 Japanese stations

What is "Activity Level" ?

This project adopts the new index which is "Activity Level" as relative value. This new index means how many times were echoes observed compared to background echo level. And two factors were considered. One is radiant factor. This factor is same as Visual observation which is 1/sin(h). Another is the elimination of error data.

You can see information of this method in research page.
The International Project for Radio Meteor Observation 2001-2003
* about this method in around 13th sheet
(H.Ogawa et al., The International Meteor Conference in 2003 )