Wednesday, January 5, 2022

Meteor Trail Min and Max LOS and Length

I can take the monthly summary from the GMN for my cameras and (amoung many other things) see what the longest and shortest meteor trails are, and the longest and shortest (LOS) line-of-site distances.

Sofar, here are the numbers (time in UTC, distances in km):

Nov 2021:
Max Len (2021-11-30 07:17:28.9) = 78.35, Min Len (2021-11-26 07:34:55.1) = 3.811
Max LOS (2021-11-16 11:49:54.2) = 561.073, Min LOS (2021-11-12 09:46:18.5) = 82.722

Dec 2021:
Max Len (2021-12-09 12:14:22.5) = 109.247, Min Len (2021-12-13 12:39:46.7) = 3.223
Max LOS (2021-12-13 11:01:33.7) = 559.994, Min LOS (2021-12-01 02:23:52.4) = 88.114

Jan 2022 (1/1 - 1/4):
Max Len (2022-01-02 09:17:46.3) = 100.646, Min Len (2022-01-03 10:46:39.7) = 4.937
Max LOS (2022-01-04 08:00:57.1) = 550.145, Min LOS (2022-01-03 08:42:05.1) = 115.460

Saturday, January 1, 2022

Meteor Stats

For all of this data, I'm just parsing the already-existing GMN monthly summaries and just grabbing the info relevant to my stations and packing it up into histograms.

First is line-of-site distance.  For this I compute the great-circle distance between my latitude and longitude, and the center of the meteor path as projected onto the surface of the earth.  I also compute the height of the center of the path.  Using those two numbers, I can compute the line-of-site distance.

In my case, I have six cameras (USL00X, USL00Y, USL00Z, USL010, USL011, and USL012.  The distribution of LOS distances is shown below:


Each camera is color coded.  Light blue = 00X, orange = 00Y, yellow = 00Z, dark blue = 010, red = 011, black = 012.  In this case, the x-axis is the LOS distance in km, and the y-axis shows the number of meteors for a particular camera.

Next is Meteor trail length (km):


Meteor trail duration (in seconds):


Number of stations making a positive ID:


Magnitude:


... and finally a plot that shows the number of meteors detected for every hour of every day of the month of Dec 2021.  The x-axis is the day number of the month, and the y-axis is the hour of the day.  The lighter the color, the more meteors detected that hour:



Here they all are on one image:




Cloud Pre-Project Investigation

Still not quite sure what I'm gonna do with all-sky images of clouds, but now at least I know how to modify the camera parameters to allow me to have some hope of collecting some image data soon.  The next step will be to actually grab the images, store them in memory, and then write them to a FITS file.  Once I get that far, I can sit back and look at images and image sequences and see what I can do with them.

Here's a full-FOV image (USL012, pointing roughly north):


... and then here are a couple of smaller clouds showing internal structure details: