five years in the building of the saskatchewan fireball camera network gordon e. sarty university of...
TRANSCRIPT
Five Years in the Building of the
Saskatchewan Fireball Camera Network
Gordon E. Sarty
University of Saskatchewan
Saskatoon, Canada
The network as it (almost) is today
The beginning: Oct. 30, 1993, Western Canada Fireball
Lots and lots (70) visual observations collected by telephone by Richard Huziak.
I wrote some software to compute the flight-path and orbit of the fireball. [Huziak and Sarty, JRASC, 88, 332-351, 1994]
Wouldn’t it be great if I could to this automatically?
The breakthrough: free stuff from Richard Spalding of SANDIA Labs
Parts arrived ca. 2005
Assembled 2 fisheye cameras in my garage
Later (2008?) I got an older Sandia mirror camera from Rick – it is now in Winnipeg.
The first detected meteor Used a sentinel box
Had summer student Andy Salisbury tinker with the camera to get it working
Videos played with sdisplay
First video here Sept. 2, 2006
Beginning of nearly continuous monitoring of the Saskatoon sky – interrupted twice by Physics Building renovations…
Nice but I wanted to get the data to my software so I could compute trajectories and orbits.
Switch to Rob Weryk’s ASGARD, 2007
• Viking sky place• Or sci-fi aliens?
The first computed orbit
Saskatoon Detections: 2006 - 2009
Camera
Setup Start Date
End Date
Clear Time (hrs)
Mainly Clear Time (hrs)
Mostly Cloudy Time (hrs)
Net Time (hrs)
No. of Meteors
Meteor Rate (hr-1)
fireball02
Sentinel
19/09/2006
23/06/2008
1224.75
1614.5 1123 2144.3 164 0.076
fireball03
Asgard 22/06/2007
19/02/2009
1206 1339 935 1969 563 0.286
fireball04
Asgard 23/07/2008
14/02/2009
NA NA NA 822.5 640 0.778
• The camera of fireball02 = fireball04 but the computer/software running the camera is different
• Based on work dome by Neil Johnson for an undergrad research project• fireball04 was moved to Lucky Lake in February 2009• “Mainly clear” ~ 50% cloud cover, “Mostly cloudy” ` 90% cloud cover, “Clear” = no
cloud cover. Based on Environmental Canada data• For fireball4, the fraction of sky visible was estimated from the hourly calibration
frames• Net time is observing time weighted by fraction of sky visible• I trim false positives from the data every morning as I read my e-mail
Photometric mass distribution
• Not the final result! The masses are too small, there is an order of magnitude error in the absolute flux determination.
• Corrections to the absolute value of the photometric mass needs to be done
• Distribution shape is correct • Flux calibration done via the stars visible in representative
calibration frames• Photometric mass x velocity2 x efficiency = integrated intensity
Installation of the Lucky Lake camera: fireball04
•Installed February, 2009 on Tenho Tuomi’s roof
•The most reliable camera on the network
The Winnipeg camera: fireball1
•Met Larry Gundrum while searching for Buzzard Coulee meteroites
•Installed, May, 2009 on Larry’s roof in Winnipeg
•No coincident detections yet
The Dauphin camera: fireball7
• An Impact Model 40396 video amp/splitter divides camera output between two computers
• Fireball7 runs Asgard, the other computer runs Sonota UFO software
• Splitters can allow us to add existing cameras to a network without interrupting their existing functionality
• Hooked into Ron Lupack’s existing allsky camera on his roof
• 1st event into io on January, 2011• Ron sent me his old computer, I
installed debian and Asgard• Getting the internet connection to
all me to ssh in is always tricky
The Yorkton camera: fireball6
• Operated by Jim Huziak (Rick’s brother)• Installed on a school roof• Connecting to internet failed – school IT
person severely messed up the computer
• Jim set the computer back to me – reinstall – maybe a new location?
The Regina camera: fireball5
• Martin Beech above• His camera is identical to the Yorkton
Camera – one of the three from Richard Spalding to Martin, ca. 2000?
• Waiting for Campion College to hook up internet… (been waiting for over a year)
• Currently on the old VCR system
Buzzard Coulee detection!
November 28, 2008
•From Saskatoon (fireball4 before it went to Lucky Lake)
Picking up meteoritesWinter 2008Spring 2009Fall 2010
Ellen Milley Tenho Rick
A man out standing in his field.
Fireballs in Dauphin but not Winnipeg
July 11, 2011
July 14, 2011 April 6, 2011
January 19, 2011
A recent event over B.C. – from Lucky Lake
May 14, 2011
A recent event in B.C. – from Cranbrook, B.C.
May 14, 2011
Video from Rick Nowell, College of the Rockies, Cranbrook, BC
Let’s Network!
Image from James Whitehead’s web site: http://www.allsky.ca/