1. April/ 2010 SonotaCo Network 1 MODWG #03 contents of SonotaCo 17 th April 2010 How is the SonotaCo Network working ? 14:00-14:30 -- Processing data flow -- Our experiences on the network Solutions on UFOseries -- UFOCaptureV2 14:30-15:00 -- UFOAnalyzerV2 15:00-15:30 -- UFOOrbitV2 16:00-17:00 Hints for the future -- FBI 17:00-17:10 (a new trajectory analysis for curved meteors) -- UFORadiant 17:10-18:00 (a prototype of actual meteor database viewer) -- a walk in universe ! 18 th April 2010 am Demonstrations -- UFOCapture -- UFOAnalyzer -- UFOOrbit -- INF2MCSV -- NightSchedular -- UFORadiant Observation Equipments (cam / lens / AD / housing / grating) 19 th April 2010 Problems of current VMO design for us -- UFOSeries for VMO

2. April/ 2010 SonotaCo Network 2 How is the SonotaCo Network working http://sonotaco.jp/ - Night sky video observation network on the internet, established in 2004. -Observing meteors, TLEs using UFOCapture -70 registered stations (including 22 hi-schools) - almost 20 stations (daily reporting) cover 50% of sky above the land of Japan

3. April/ 2010 SonotaCo Network 3 Meteor Observations Year #stations > 100 obs #single station observations #simultaneous meteors Epoch 20031 Not analyzed 0 Apr: UFOCapture Sep: UFOCaptureEx (w. S.M.) 200410…10,0000 Jan: UFOAnalyzer Dec: UFOOrbit, CSV Hub 200510…60,000 Not counted May: UFOCaptureV2 200615...100,0007,705 Mar: UFORadiant Oct: Finding of OCU 2007 SNM\2007.txt 20163,80419,274 Jan: UFOAnalyzerV2 Apr: UFOOrbitV2 2008 SNM\2008.txt 21146,30119,436 2009 SNM\2009.txt 22 (73cams) 180,73525,940 Jan: J4 shower catalog Jun: SNM2007,2008 2007 2008 2009

4. April/ 2010 SonotaCo Network 4 64650 meteors in 2007-2009 observed by SonotaCo Network

5. April/ 2010 SonotaCo Network 5 Where the Earth Collision Objects come from, and where they do not come form. Sporadic meteors observed in 2007-2009

6. April/ 2010 SonotaCo Network 6 Processing Data flow on SonotaCo Network

7. April/ 2010 SonotaCo Network 7 What happened in Simultaneous Observation -- Observation by more than 2 station happens often! 30% are observed by more than 2 stations up to 10 stations

8. April/ 2010 SonotaCo Network 8 Meteor Distance < 150km 30% 150 - 200km 40% 200 - 300km 20% > 300km 10% Up to 700km Magnitude (2007-2008) Factors : -Detection sensitivity -Natural distribution of meteor magnitude -Distance and elevation angle of cameras -Weather equality on the region

9. April/ 2010 SonotaCo Network 9 Elevation angle (where is the best angle?) Zenith was not the highest probability direction. Effective observed area size was the major factor. 200 to 300km distance of two stations would be the best efficiency ?

10. April/ 2010 SonotaCo Network 10 What was got by only 2 stations 2 all-sky stations (average Qc = 38.5deg) … 157km is too close!! Only 2 cameras (average Qc = 39.9 deg) (average Qc = 55.7 deg)

11. April/ 2010 SonotaCo Network 11 Why SonotaCo Network is growing (what I think important to cooperate with non-professional scientists) Network is rewarding the each observer ’ s efforts. --- Multi station results can be confirmed by observer themselves very soon. --- Members can share the delight of findings with each other on the online forum. --- Observers are respected, cited, and often acknowledged. --- Everyone can play a role for the latest science by acceptable expense. Openness -- All discussions are done on the online public forum where anyone can join in. -- Even read only guests can see the all events that were happened near him. Privacy keeping --- Precise location of the stations are encrypted, and hidden from human eyes. ( almost all the home observers hoped to hide below 0.01 degree of long/lat. ) --- Nickname allowed To allow these anonymousness, the data must be checkable its consistency, reliability, and accuracy by itself (Now UFOOrbit is rejecting improper data and selecting their quality).

12. April/ 2010 SonotaCo Network 12 Conclusion Public research on the internet has the possibility to gather tremendous number of observations. We should create a safe, easy, and interesting online network. ( Online discussion forum may be needed for each language ). We should create the observation database first. Once multi-station observation begins in public, it will grow rapidly. Simultaneous observation encourage the observers a lot. Sharing of beautiful events is exciting itself. Actual information of what are happened in nights instincts many peoples scientific mind. If they know the possibility, observers or their cameras increase naturally. It can be started from only 2 stations at 300km far.