First scientific results submitted for publication – circular storms
Finally, a little after 1 year from the launch of SSW, we are finding ourselves in the exciting position of having lots of interesting science data to revel in.
I began my first study by looking into the details of the circular storm thread. At first, I thought about drawing circles on top of each frame in the same manner as the initial example shown in my blog. But the shear large number of events that were being identified made this too difficult. So in the spirit of finding a method of analysis that can be repeated quickly and easily for all of the new storms being seen, I started to use the tracks found in J-maps.
I thought that if the front and back edges of these ideal circular storms can be identified with a dark cavity in the middle, then each storm would display 2 tracks in the J-maps. This means that if I measure the distance between each track then I can measure the size of the storm continuously as it moves away from the Sun. Also, if I measure the angle between the top edge – Sun – bottom edge then I can get an estimate of the vertical height of the storm continuously. These two pieces of information allowed me to experiment with 4 of the storms identified in the forum within the circular storm thread.
Below is a picture I created that shows the estimated shape of the storm as it moves away from the sun. The blue shaded region is the average estimated size from the 4 storms analysed. The red shape is an average estimate made from hundreds of storms- but to do this requires mixing statistical estimates from cameras close to the Sun and 1D measurements made when a storm travels over a spacecraft (in situ observations). Below, the Sun is shown as 5 times the real size for clarity, and the axes are shown in solar radii (Rs). Earth is nominally positioned at 215 Rs.
I have now submitted these results for publication, so I would like to thank you for all the effort and hard work that you have put into getting this project off the ground. So if you havent already done so, you still have time to register yourself as officially contributing to the work here !!! 🙂
Well like Chris said in his blog earlier, I’m now off to analyse all the lovely science data from the trace-it tasks. So with a bit of luck you guys will start to hear more regular updates as the science team start ploughing through the results.
Well done everyone and keep up with all the work, as we could not have done it without you.