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left arrowarrow leftTable II a  -  Page 3
York Soaring Association Glider Field, Arthur East, West Garafraxa Co., Ontario;  September 6, 1998;
Co-ordinates = 43°50'N, 80°25'W;  Altitude = 474 m;  
Magnetic Declination = 9°W (Subtract 9° for True);  Magnetic Inclination = 72.50°;  
Observer:  David Gibo, Marilyn Hanna
Num.    Species    Time Flight Behaviour Weather Field Notes
I     II     III IV Va Vb Part 1 Part 2 Part 3
Est.
 Alt.  		 Type
of Flt.		 Horiz.
Path 		Vert.
Path 		Mag.
Bear.		 Mag.
Head.		 Wind
Dir.		  Wind 
Vel.		 Amb.
Temp.		 Thrm.
Act.		 Cloud 
Types 
1 Danaus plexippus 4:56 45 m glide, soar straight,
circle		 descend
climb		 157° approx.
90°
right		 324° 3 m/s 26.0°C yes cumulus Observations were made at SE end of the main runway.  Butterfly glided down from 45 m, encountered a thermal and began circling and climbing.  An Anax junius  was seen briefly in the field of view about 10 minutes after D. plexippus.  Wind had veered from W in the morning to NW by late afternoon in advance of an approaching cold front.  A large dragonfly (Anax junius) was seen about 10 minutes after butterfly.
Quit

-

 5:36 - - - - - - 323° 1.3 m/s 23°.0C yes cumulus

Gliders were soaring.