Recently Browsing 0 members
No registered users viewing this page.
The weather forecast was poor when I looked out of the window at about 10:15pm BST, Tuesday hoping for a chance to see a few Perseids. Instead I saw repeated, bright flashes of light. I assumed a neighbour's floodlight was on the blink, but it was lightning.
For the next 40 minutes I stood outside enjoying the best display of (mostly) sheet lightning that I have ever seen in the UK. Every few seconds there were multiple flashes from random directions covering all points of the compass, illuminating some cloud layers & backlighting others. It was completely silent; no thunder so a little bit spooky, like the opening scene from some dystopian sci-fi movie. There was no wind so the storm hardly moved at all.
After a while 2 banks of cloud to my SW and NW started to produce brilliant forked lightning flashes; first one, then the other, like a choreographed firework display. Still silent so they must have been many miles distant although they seemed quite close. All the forks seemed to be within clouds, I saw no ground strikes. This perfectly matched the ancient idea of angry gods hurling lightning bolts across the heavens at each other.
At 11pm I heard the first rattle of thunder, and rain drove me indoors but the lightning continued for at least another hour. Amazing!
But what of the meteors? Well for most of the time there was 100% cloud cover, but from 10:20 to 10:30pm there was a 15 degree hole near the zenith and at about 10;25 a beautiful yellow Perseid fireball zoomed past Vega, heading South-West, as if fleeing from the storm.
I am a complete beginner to meteor scatter work and have just joined this group.
The following equipment is being used: 2m/70cm dual band Yagi on the roof of my house. This antenna is pointed almost vertically (I live in Lyon, about 200 km due south of the GRAVES transmitter). Quick question: should I be orienting the antenna in this way? I am doing it in view of my relative close proximity to GRAVES. Would appreciate any comments on that one.
I am using the RTL-SDR.com dongle and had no issues setting up Spectrum Lab. I am using SL version 2.93 b8 and have downloaded Ian Lauwerys CA script "MetScat_Comprehensive_V7.usr" which if I understand correctly is adapted from Paul Hyde's work and avoids the different processor thread issues between the FFT calculations and the CA loop as mentioned elsewhere.
My current problem (and I have just been testing my system as we come off the April Lyrids maximum) is that I am getting far too many false positives: even after only 30 min tracking the system captures well over 300 events. The SNR_Threshold value in the CA script, which was originally set at 15dB , has been progressively increased, in steps of 2, to 25dB in attempts to reduce the number of false positives, however this has had totally no effect of the number of false events detected.
I have attached a screen capture. I greatly suspect I'm making a Newbie error here so any assistance would be greatly appreciated.
It has been a while since I posted here. I was waiting for my telescope but unfortunately my friend could not bring it along from UK Anyway since that happened I decided to continue my search for a telescope and in the meanwhile I decided to get myself a nice binocular and carry on until I get hold of a good scope. Perhaps, I could continue with a bino for some time and gain experience and then if the passion doesn't die I can get a scope.
Anyway, I went to a hill station where my father-in-law has a couple of flats (at a height of 6,000 feet) and so they spend every summer there. I usually go for a few nights with my wife and kids for vacation and then come back. I had noticed in previous years that the sky is a delight in the balcony of that flat if clear. However, in those days I looked up at the stars and well that was that. So this year I wasn't able to wait to go there and observe it rather than seeing it like before.
It mostly rained however I had two clear nights to myself and I cant tell you how lucky I was in those two nights. I enjoyed myself a lot and learnt and also thought quite a lot. I also have a couple of questions from my first night that I would like to ask in order to ascertain my understanding. Anyway, during the first night I did not have the binocular that my father-in-law has as I had forgotten about it. So I just went there and saw things and tried to make sense out of them. I knew it was a pre-night to the Perseid peak but I had no idea that I will see the shower with my naked eye and that it would be that much. I saw the shower with my boy in my lap who would point out at every flash with excitement. However, there are my questions:
1. I saw the shower where different (shooting stars) kept coming. they were like little balls of fire having a head a trail of light following them. But then I also saw something else during the same time and it happened more than the shower. I saw little flashes of light in the sky. One after the other and there were about a dozen of them coming from the same part of the sky more or less. Those were like little tiny dots of lights igniting at a spot and then going out in a second or less. However, they did not have any trail or streak in the sky they were like little spots that would shine in a spot and then go out. what were those ???
2. I also spotted a satellite that was a very bright and moving very fast. However, some website suggested that it was the ISS. How does one differentiate between a satellite and the ISS ? How to know what you are beholding ???
It was during the next night that I remembered the binoculars. When I got them from him those were a 12x25 not that good but not bad either. So I gazed at the moon and enjoyed its majestic beauty. Seeing the moon not as a disk and as a spherical object with your own eyes have n effect on you ... it was just lovely. Then I also spotted the Cassiopeia and observed it for some time. And then in the end the last thing was the seven sisters in the Pleiades and that was mesmerising. the distinctive question mark in the sky that made me think and contemplate on many things including, on a lighter note, the fact that I observed the sky and had questions in my mind but the sky responded with a question mark telling me that there is more that there are things even they don't know of I shall be writing an article about it soon.
For the first time in ages I've been able to see the meteor shower as it's been clear for the first time in years from where I've been. Even got the missus to finally see a meteor!
As I went inside for a few minutes I also swear I heard an object hitting something hard and then our hedge move. I know it's pretty unlikely to be a meteorite but had a quick look but didn't see anything
I reckon I'll have to have a gander in the morning but I wont count my chickens!
Did anyone else get a chance to see any meteors?
There's something you don't see every day. I was collecting Ha with my Zuiko 50mm/Atik460 combo tonight, and this appeared on one of the 600s sub-exposures. I didn't see it, but it must have been bright - and presumably have a bit of ionised hydrogen about it (from the meteor and/or the atmosphere).
This is the stacked frame with the meteor frame integrated on the stack.