Meteor Hunter

Meteor Detection Data Updated - End of 2010

2011-01-01T13:26:00.000+11:00

The high level data summary page has been updated for the remaining months in 2010, October, November and December.

December was a record month with 79 Meteors detected!

This is of course due to the relatively clear skies over Melbourne during the summer months. October was plagued with a cable problem when the polycarbonate roof was replaced and all cable were re-routed through conduit around the house. The main data cable was not plugged in for 8 days!

On the positive side, since the automated Microsoft updates was turned off in Windows 7 the system has not failed to boot once. Lots of experience was gained in 2010 so hopefully 2011 will lead to higher meteor counts and a smoother running remote Meteor Hunter observatory!

Happy New Year from Meteor Hunter!

End of Astrovid

2010-12-31T15:08:00.000+11:00

My Astrovid Fireball Camera has performed admirably over 2010 and is still going strong! Unfortunately it is a collector's item of sorts as the company that made the Fireball camera, Astrovid (Adirondack Video Astronomy or AVA) disappeared during 2010.

I was curious what happened to Astrovid, and more so the Fireball camera product range, so I did some investigation and emailing over the last few months. The following is what I discovered.

April 21st 2010

This was close to the last date that the AVA web site was operational with the familiar Astrovid home page.

25th May 2010

Around this date the Astrovid web site was removed, only to be replaced by an 'under construction' message...

15th November 2010

From this date onwards, and perhaps earlier, the Astrovid web site is completely dead.

30th November 2010

After some Googling around, I found a hint on a local Australian company called Telescope and Astronomy that were still selling Astovid StellaCams. The web site had the following banner that pointed to a new company called CosmoLogic Systems that appear to have taken over the StellaCam range.

On checking the CosmoLogic Systems web site, it too was under construction however, it does at least have a notice explaining the demise of Astrovid "Due to the difficult economic situation, AVA has ceased its operation, but the Astrovid product line will still continue through CosmoLogic Systems.".

Perhaps the Fireball camera lives on? I decided to email CosmoLogic Systems and got a prompt reply:

"Yes, we are taking over some of the Astrovid line - specifically the StellaCam3, the Wat-902H Ultimate and all related accessories including the wireless controller. We do not plan on offering the Fireball Cam, as there was very little demand for them - I think only a couple of them were sold over the period of a year. Anyone interested in a Fireball Cam type arrangement could simply house a Wat-902H (or StellaCam3) camera inside a security camera housing.

Thank you for your interest in our products.

Best regards,

CosmoLogic Systems"

So it is official. There will be no more Fireball camera's :(

The last point in CosmoLogic Systems reply is valid of course and you could certainly build your own, and in fact most amateur Meteor Hunters do, however it does take extra resources and effort as a pose to simply purchasing a working system of the shelf. Once I am ready to add more camera's it looks as though I will have to do exactly that, build a system out of parts, unless another astronomy supply company is willing to step into the small and esoteric market of amateur Meteor Hunters :)

My Fireball Camera lives on!

As a farewell to Astrovid in 2010, here a few interesting pics of my Fireball cam in different Melbourne weather conditions. From cold rainy winter days to scorching summer days like today where the temperature is 38 degrees Celsius!

The Fireball cam gets a new resident. Apparently trying to clean the cobwebs away just results in them coming back a few days later. As long as the spider stays away from the front of the camera there should be no real problem.

The Fireball camera (and the resident spider) is constantly exposed to heavy rain in the winter months in Melbourne.

A pot of gold at the end of the rainbow?

Another hot summer day. In this picture you can see the Moon behind the camera, although the camera itself has been set up never to image the moon by pointing it at the south celestial pole.

Meteor Detection Data Updated

2010-11-06T15:56:00.000+11:00

The high level data summary page has been updated for the months of July, August and September. July was a good detection month, despite July being mid-winter in Melbourne, with 49 meteor detections. Overall the months of August and September were very disappointing.

August had a total of eight days where the system was down. The cause was determined to be the automated Microsoft updates being installed in Windows 7, which have now been switched off. On rebooting, the system would come up with the automated Startup Repair dialog boxes, as shown below. Hopefully this issue won't come up again.

This issue highlighted a significant problem with operating a remote automated system, that of being able to monitor the system's status. Currently I rely on the UFO Capture software to send periodic emails, once every few hours, like a heartbeat signal. This works well if I am able to access my email and remember to check for the last Meteor Hunter system email. This method of checking is a passive method, it requires me to perform some action to determine the system status. On a day to day basis this just isn't reliable, as like most people, I am too busy to maintain a consistent monitoring effort.

I have started writing some software to monitor the health of the system and to actively notify me of any problems. This would be a much better approach and should result in faster turn around time to resolve any issues. I'll write more about it when I have completed and tested the initial version of the monitoring system. It will take some time to do properly, but should be worth the effort.

Data Summary Page published

2010-08-01T17:29:00.000+10:00

It's been a while since the last post, but I have been busy working on the Meteor Hunter system. In Melbourne the destroyed polycarbonate roof is still being replaced. In the meantime, all the camera cables have been re-routed through proper conduits to improve their long term survivability.

Also I have spent some time collating all the meteor data collected so far from February to end of June. A high level summary of the data has been posted and work has begun on using UFO Analysis to analyse individual meteors.

Lastly this blog has been given a quick facelift thanks to some cool new templates posted by Blogger, hope you like it.

System Architecture Page published

2010-04-21T21:00:00.002+10:00

I have added a permanent System Architecture Page to detail the overall system setup. On that page you can also find some system timing diagrams and a list of all hardware and software used by this system.

Melbourne Storms

2010-03-07T21:42:00.000+11:00

Melbourne had its biggest storm on record yesterday. Hail the size of golf balls pelted down onto the camera and surrounding roof. It sounded like gun fire. Our family car was dinted and the polycarbonate roof next to the meteor camera was riddled with holes.

Somehow my meteor camera has survived and remains functional. As the storm occurred during the day it did not capture any images of the storm. I'm just grateful it is OK as the camera was only installed for a few weeks...a testament to its all weather construction.

Today it was bucketing down again, but luckily no hail. Now that the roof is so damaged, the water just pours onto the patio!

Permanent Mounting for the Meteor Camera

2010-02-27T21:40:00.000+11:00

Finally I have a permanent mounting for the camera, complete with a custom made bracket. The mounting allows the camera aim to be adjusted, which is handy during installation. I don’t intend to move it once it’s in position.

I decided to point the camera at the South Celestial Pole (SCP) for several reasons:
- There will always be reference stars in the FOV
- There is no risk of the Sun shining directly into the camera
- Light pollution from the Moon is minimised

Using the scintillation mask once more from UFO Capture, I was able to exaggerate the stars that could be detected by the camera in the following image. That allowed me to identify the stars and pin point where the camera was aimed at.

White dots circled in red are actually hot pixels, determined from a dark frame image shown on a previous post. The camera is pointing slightly off from the SCP but it’s good enough for what we need. I used Starry Night Pro 4.5 to manually identify the stars in the image. I first tried overlaying multiple layers of the Starry Night image and the actual image from the camera but found that I could not match them 100%, I suspect that there is slight image distortion from the glass and perspex lens of the housing. Nevertheless, the image is close enough to accurately match the star patterns.

Note that the the faintest star that was masked consistently by the scintillation function of UFO Capture was at an apparent magnitude of 6.12, identified as HIP109584 (circled in dark blue in the image). Hopefully this means that I can get consistent meteor detections down to an apparent magnitude of 6 all year round, weather and seeing conditions permitting.

I also used Starry Night to measure the angular separation between a few reference stars to get a feel for the FOV and these are drawn as yellow lines in the image.

And then there were meteors...

2010-02-21T20:18:00.000+11:00

I setup the temporary tripod arrangement one more time, pointed it in the same direction as before and was awarded with my first two meteor detections! In the following images, the stars are exaggerated due to the UFO Capture scintillation filter which masks out fixed points of varying light.

Meteor 1

I actually watched my first meteor pretty much live as it occurred early in the evening and I had UFO Capture open in a window on my desktop. UFO Capture was set to play a sound to alert me which it did.

Meteor 2

This one was a lucky capture as the meteor streaked across the top of the field of view, just above the encroaching cloud cover.

I was now looking forward to permanently mounting the camera system and automating the equipment. Running the camera on a tripod meant running data and power leads out the window, across the garden and to the camera and the risk of tripping over it at night is always there...

First Light

2010-02-19T14:24:00.012+11:00

For the first nights inaugural test I set the Fireball camera up on a tripod and pointed it approximately west, the only spot where I could get a clear view of the sky from ground level.

Almost straight away I was able to capture moving things such as birds and planes. UFO Capture can produce a few different snapshot images as well as a movie of the event. One of the snapshot images is a ‘hit mask’, basically an image of the scene with the total movement track of the object over the capture period, highlighted in cyan.

Here are a few examples of birds. You can see their random movements create some cool track effects.

The Flapper

Track left by a bird that crosses past the lens relatively closely. The 'bumps' are the bird flapping its wings.

High Altitude Flock

Multiple tracks caused by many birds flying together relatively far away from the camera. Not sure where they are all going?

Love Birds

One bird chasing another bird. There are three tracks because at the very end of the video one of the birds flies back down the frame at high speed...obviously she was not impressed with the first bird.

Speed Demon

This smudge track occurs when a bird flies extremely fast and close past the lens.

Another hazard to avoid are planes. Planes usually go in a straight line and some have flashing lights that cause the track to ‘pulsate’.

Flashing Plane

A typical track of a flashing plane right across the image. You can see the regular flashes on the track. Thanks for wasting my disk space buddy.

Another pest to the camera are insects.

Crazy Bug

Insects move like no plane or bird can...all over the place!

Rods - Inter-dimensional Insects

That's what some people in planet Earth think these kind of captures show. When an insect such as a moth flies very close to the camera it leaves a distinctive track and looks like a tube creature with wings. There was even a Monster Quest episode on it. Google "Rods" and you'll be entertained for a few hours.

Of course it rained towards the end of the first night...but that’s Melbourne for you.

And after all that, no meteors!

Meteor Hunting Software – UFO Capture

2010-02-19T13:46:00.001+11:00

The final piece in the puzzle is some meteor detection software. There is only one real meteor detection software that I could find that allows real detection and analysis of meteors to be performed. The software is called UFO Capture and comes from a company in Japan called Sonotaco (http://sonotaco.jp/main.php). There is a great community of meteor capture enthusiasts that actively participate in the forums and the support from Sonotaco is second to none.

UFO Capture is extremely tailored to the capturing of meteors and other atmospheric events, such as lightning or sprites etc. There are many parameters that you can set including filters for noise and masks to avoid slow moving objects or flickering objects. Additionally the software can even email you when it captures something which is extremely handy for a remote setup like mine.

The software can also be set to only detect at certain times, based on the Sun rise and Sun set times that are automatically updated daily by the software. That’s great for saving power and avoiding birds in the morning. You would be surprised how many birds fly over the camera filling up your precious hard disk space (and inbox!).

In the following screen shot of UFO Capture, the camera was placed inside a dark box to take a 'dark frame'. Turning on the scintillation mask exaggerated hot pixels that are remain on after long exposures (the hot pixels are not really that big in size). You can see that there are about 10 in this camera. The remainder are just random noise. It is not unusual for a CCD to have hot or dead pixels and these shouldn't cause an issue for meteor detection.

UFO Capture Main Detection Screen - Dark Frame

Digital Video Converter

2010-02-19T12:00:00.000+11:00

I also required an analogue video to digital video converter as the camera outputs a standard analogue video signal. For this I chose a Canopus ADVC-55 DV Converter (http://www.grassvalley.com/products/advc55). The ADVC-55 plugs into the FireWire (IEEE 1394a) port of the PC and is self powered when using a 6-Pin FireWire cable. Windows should pick it up as a DV device.

FireWire Problems

As expected, no installation involving a PC ever goes smoothly and this one was no exception. The built in FireWire ports on my Gigabyte GA-965P-DQ6 (rev 2.0) motherboard just would not detect the ADVC-55 DV Converter.

I tried all available FireWire drivers, from the legacy Windows drivers to the latest Windows FireWire drivers and no luck. Gigabyte didn’t seem to have any FireWire drivers to download for this board so they were no help. In the end I had to install an old PCI Sound Blaster Audigy card that just happened to have a FireWire port on it. Bingo – it worked straight away!

I wonder if others have problems with FireWire and Gigabyte GA-965P-DQ6 (rev 2.0) motherboards, it was just lucky that I could work around the problem relatively easily. One day there might be an update and I can use the native FireWire ports and remove the Audigy card, but it isn’t really an issue so will run with it for the moment.

All Working

Once I had it running I used Windows Live Movie Maker to test the video signal. Everything was OK so the system was ready for an initial test.

Canopus ADVC-55 DV Converter sitting on top

on my Meteor Hunting PC.

Meteor Hunting PC

2010-02-19T10:58:00.007+11:00

To accompany my new Astrovid Fireball Camera I needed a reliable PC system to drive the meteor detection software. The meteor detection software comes from a company in Japan called Sonotaco (http://sonotaco.jp/) and I’ll elaborate more on the software in later posts.

The new meteor detection PC needed to be fairly powerful to cope with the video processing and storage. Video manipulation is one of those areas that still pushes PC requirements way beyond that of say, Microsoft Word or playing Solitaire.

Video files can take up a lot of space, particularly considering that the system will be detecting meteors every night. I had just upgraded my main PC system and had a few spare parts lying around that could go towards building a PC that would fit my needs.

Additional to the parts that I already had, I decided to replace the following:
Power Supply – I wanted a new one for clean reliable power
Hard Disk – Ample space on a new 1TB Hard Disk
Case – I really needed a better air cooled case to cope with those hot 30 degree nights in Melbourne! The massive 200mm fan on top of the Antec Nine Hundred case should help :)
Monitor – I finally had an excuse to ditch the 20KG 19” CRT monitor for a much brighter, lighter and larger LCD. It’s amazing how cheap LCD’s are these days compared to what large CRT’s used to cost.
I installed Microsoft Windows 7 Ultimate for what would hopefully be increased stability. Rarely a day goes by where I don’t crash Windows XP or Vista. Actually I also crashed Windows 7 a few times with a blue screen of death, it’s quite hard to do and requires a special talent, but that’s another story.

The final PC specs follow:

Computer Name - Meteor
Operating System - Windows 7 Ultimate
CPU Type - Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
Motherboard - Gigabyte GA-965P-DQ6 (rev 2.0)
System Memory - 2,048 MB DDR2
Power Supply - Antec 550w Basiq ATX Power Supply
Case - Antec Nine Hundred, Black, ATX, Top Mounted 200mm Fan
Video Adapter - NVIDIA GeForce 8800 GTX
Monitor - Acer H243H (DPMS)
Disk Drive - SATAII Device 931 GB
Optical Drive - HP DVD Writer 1270r ATA Device

Not only are the PC specs quite adequate, but the PC itself turned out to look pretty cool with bright blue LED’s in all fans, including the massive 200mm fan on top.

My Meteor Hunting PC. The silver box on top

is a Canopus ADVC-55 DV Converter.

The PC was ready to hunt meteors.

Astrovid Fireball Camera Arrives

2010-02-15T16:57:00.000+11:00

My Astrovid Fireball Camera has arrived. Of course I couldn’t wait to pull it apart and take a look at the components inside. I was happy to see that it is solidly built and well constructed. Attention to details like cable placement with appropriate cable ties make for a professional product. The supplied documentation was also good.

The Astrovid Fireball Camera is weather proof and the housing is heated and cooled. If you look at the pictures you can see a small fan used for cooling and some kind of thermal pad to heat the front, presumably to keep of the dew in winter. Note that although the unit has a fan, there are no holes in the housing so it is 100% water proof. That’s a good thing as this camera will be mounted on the roof of my house and will be exposed to all of the harsh weather conditions in Melbourne.

Inside the housing sits a Watec WAT-902H Ultimate CCD camera with a Tamron lens with auto-iris mounted to it. The Tamron lens is 3 – 8mm range with 1:1.0 aperture. The auto-iris will automatically adjust to the lighting conditions.

For more details on the Astrovid Fireball Camera see http://www.astrovid.com/prod_details.php?pid=3489&querystr=fireball

My new Astrovid Fireball Camera fits in my hand. Nice and compact design.

The main clear flat window is covered by another

dome shaped clear window to allow water to run off it.

Left front view of the inner assembly. The inner assembly slides out easily and is held in by one screw. When you re-insert the inner assembly, a rubber o-ring inside the outer assembly fits neatly into the metal groove that can be seen at the back. This ensures that the unit is water proof once again after re-assembly.

Right side view. Note the Watec WAT-902H Ultimate camera.

Close up of the cooling fan at the back of the inner assembly.

Close up of the Tamron camera and inner heating pad at the front of the inner assembly.