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<title>George's Astronomical Observations - Aurigid trip blog</title>
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This is a blog of the events leading up to and participating in the Aurigid Outburst Campaign
which was made possible with funding provided by The American Meteor Society. Thank you AMS!

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<title>Aurigid Meteor Movie: September 8, 2007</title> 
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<strong><a href="gv_20_meteors_16_clips_1150.mpg">20 Aurigid meteors (video 8.8Mb Mpg)</a></strong>
<p>This video contains some 20 Aurigids imaged between 10:53 and 11:45 UT. Notice how the light from several meteors
gets reflected by the airplane wing in the lower right corner of the field of view.
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<pubDate>Sat, 8 Sep 2007 10:00:00 GMT</pubDate>
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<title>Aurigid outburst: September 7, 2007 - Preliminary counts</title> 
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Some preliminary 10 minute counts from the wide field camera. FOV=50 degrees wide by 25 degrees high. 
Times are possibly inaccurate and need to be shifted slightly ahead or back.
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<TH align="LEFT">10 minute period UTC</TH>
<TH align="CENTER">Count</TH>
<TH align="CENTER">Count brighter or<br> equal to Mag 0</TH>
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<tr><td width="200">10:53:37 - 11:03:37</td><td width="180" align="CENTER">8 </td> <td width="180" align="CENTER">1 </td></tr>
<tr><td width="200">11:03:37 - 11:13:37</td><td width="180" align="CENTER">17 </td> <td width="180" align="CENTER">10</td></tr>
<tr><td width="200">11:13:37 - 11:23:37</td><td width="180" align="CENTER">20 </td>  <td width="180" align="CENTER">7</td></tr>
<tr><td width="200">11:23:37 - 11:33:37</td><td width="180" align="CENTER">13 </td>  <td width="180" align="CENTER">7</td></tr>
<tr><td width="200">11:33:37 - 11:43:37</td><td width="180" align="CENTER">12 </td>  <td width="180" align="CENTER">3</td></tr>
<tr><td width="200">11:43:37 - 11:53:37</td><td width="180" align="CENTER">6  </td>  <td width="180" align="CENTER">3</td></tr>

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<tr><td><b>Overall: 10:53:37 to  11:53:37UTC</b></td><td><b> - 76 meteors total 31 brighter or equal to m1=0</b></td></tr>
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<pubDate>Fri, 7 Sep 2007 10:00:00 GMT</pubDate>
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<title>Aurigid outburst: September 6, 2007 - Video time exposure</title> 
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<a href="http://www.gvarros.com/gv_aurigids_aggregate_1.jpg">Several Aurigids; I'm building a video time exposure</a>
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<img src="gv_aurigids_aggregate_1_small.jpg" width="400" alt="several Aurigid meteors">

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<pubDate>Thu, 6 Sep 2007 10:00:00 GMT</pubDate>
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<title>Aurigid outburst: September 5, 2007 - A brief account</title> 
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Well, here is a brief account of the Aurigid MAC mission. I will add more to this including pictures as the next few days go by.  

<p>

Thursday afternoon, August 30, after flying in to San Jose 
airport from Baltimore Maryland and arriving at the SETI institute, I unwrapped the meteor tracker instrument and video gear 
that I had shipped via FedEx. Everything arrived intact except the clear plastic bin that held the video gear. The tub was 
shattered but fortunately, the equipment survived in tact. All was well. I mounted the mirrors, checked the alignment and started 
mating the spectrograph to the tracker mount. we then attended a general meeting about the flight, took a look at sky maps, flight 
paths, and got an idea as to the details of the mission.
<p>
Seeing the various experiments people were preparing was very interesting and it was great to see people I'd met 
before, and also those that I hadn't. 
The English and French traded various jokes about each other, they are quite clever and amusing!  
<p>

Later in the afternoon, we headed to AMES Research Center flight line to set up instruments in the 
airplanes which were both Gulfstream G5s. We later received a safety inspection of sorts and then the plane I was 
on, went on a two hour test flight to ensure things were indeed up and running with no power issues, glitches or unforeseen 
anomalies. During the flight, there were several small thunderstorms below which were impressive in the image intensified 
screens. Fortunately we didn't roast anything. Shortly after landing we all headed to the hotel to sleep for the rest of the night.
<p>
Friday waking up, came really late for me. I was up by 7:00 am California time (10 AM EST) and shattered long duration record 
or something.  I met with a few others that were up early but we were all not really able to (or supposed to) do anything until 7:00 pm at which 
time we headed  back out to the airplanes at AMES, for the event! The agenda was to rest up of the day.

<p>

We arrived at the AMES flight line just before 7:00 pm and Geoff calibrated his spectrograph with his helper outside the 
airplane standing on a ladder holding some calibration lights. It was difficult to do this because of all the millions of 
lights in the background field of view. 
<p>

We took off and shortly after crossing 10,00 ft, started setting up. All gear had to be stowed for takeoff and landing, 
not only the seat backs. To stow and unpack, we formed somewhat of a human chain to pass the gear forward from the aft 
storage compartment. It worked well
and saved time. 
<p> 

After setup and some initial calibrations and tweaking, we took a couple of hours of data surrounding the expected time 
of the peak. The meteor tracker tracked several meteors with four bright events in one little specific area of the sky in a short
period of time. 
It was exciting to see it on the screen as I never really monitor it in real time; the meteor tracker is automatic and hands off. 
I do not know if Geoff was able to obtain spectra though. I was unfamiliar with it so had little clue as to what I was seeing in his 
video screen. 

<p>
I have not yet completed a timed count of the wide field video but hope to do so soon. Basically, the AMI-IT meteor tracker 
was used for data that I did not record. I did record only my wide field camera. I certainly hope all came out well and do 
not know how long it will take for the results of Geoff's experiment.

<p>
I thank the American Meteor Society for helping me to participate in this event.

<p>

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<center>Pictures!</center>


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<a href="Peter_plane_nose_DSCN3980.JPG">Dr. Peter Jenniskens, Aurigid MAC PI</a> <br>
<a href="Jeremy_DSCN3920_copy.jpg">Jeremie Vaubaillon of Caltech</a><br>
<a href="groupphoto_copy.jpg">Group Photo</a><br>
<a href="group_shot_DSCN3907_copy.jpg">Lining up for a group shot...</a><br>
<a href="DSCN3937.jpg">The confident Jeremie Vaubaillon</a><br>
<a href="DSCN3872_briefing.jpg">Mission briefing</a><br>
<a href="DSCN3978_gv_nose_happy.jpg">Happy after the mission!</a>
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<a href="DSCN3884_hangar.jpg">Hanger One</a> <br>
<a href="DSCN3902_rays.jpg">Crepuscular Tarmac Rays</a><br>
<a href="airplane_wing_moon.jpg">Moon image 1</a><br>
<a href="airplane_wing_moon_2.jpg">Moon image 2</a><br>
<a href="airplane_wing_stabilizer_moon.jpg">Moon image 3</a><br>
<a href="ames_flightline_moon_at_night.jpg">Moon Image 4</a><br>
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<title>Aurigid outburst: September 3, 2007 - preliminary stuff</title> 
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Wow, what an event! It was a confirmation of a meteor stream model developed by Dr. Jeremie Vaubaillon of Caltech and Dr. Peter Jenniskens. 
<p>


<a href="http://www.gvarros.com/gv_090107_28aa_copy.jpg">4 Bright Aurigids in less than 5 minutes!</a> &nbsp;<a href="28.mpg">2.7Mb MPG Video</a><br />
<img src="5_minutes.jpg" width="400" alt="4 bright meteors"> <br />
<br />
This is a very rough composite of 4 meteors and I have loads of data to parse so more images will be posted soon. 
This image shows the airplane wing in the lower left side with reflections on the wing's leading edge, of the 4 brigtht meteors above.
 - 10 meteors were picked up in the 4 minute 45 second period (this one 1Gb video segment), in the wide field camera pointing to a fairly high peak ZHR.
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<title>Aurigid outburst: August 31, 2007</title> 
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Last night we took a test flight out of AMES and successfully mated the USAF spectrograph to the meteor tracker. 
There were an abundance of lightning strikes below the plane and in our field of view. It was impressive to see and
hopefully, there will be a sprite or two in the video I captured.

<p>
Everyone on the plane is ready for the main event and the excitement level and anticipation is very high. Jeremie Vaubaullion is confident
of his predictions for this event to materialize.  Dr. Jenniskens is truely amazing in his ability and success to put together
these airborn campaigns together. 

<p>

It was great to see several people I've met over the years and others that I have never met. A wonderful time is being had by
all!  

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<pubDate>Sat, 31 Aug 2007 10:00:00 GMT</pubDate>
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<title>Preparations for imaging the Aurigid outburst;</title> 
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The meteor tracker (AIM-IT) instrument was shipped last week and I've received the itinerary and will be on the right side of one of the two planes.
This will put the radiant somewhere around 240 degrees with respect to the SW direction of travel meaning I'll be aiming at the meteor's
backside. Being on the right side of the plane fits well with the meteor tracker's mount arm that will hold the high frame-rate spectrograph.
It might allow the instrument to be angled further towards a point opposite the radiant, lessening the phase angle, which will lessen
the tracking needs allowing more mirror stability and longer uninterrupted runs of obtaining spectra. Plans are to run the spectrograph at 
500 frames per second which should yield 16 spectra per video frame. Hopefully, we will not have any trouble integrating the spectrograph
with the meteor tracker. It will be done late in the game but a fall back plan is for the tracker to image an 8x6 degree FOV in unfiltered
light with its usual PC164 ExView High Res camera. The spectrograph will be mounted in a fixed direction.   

 
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I fly out to San Jose early Thursday morning. Been a couple of years. I'll need a window seat to prevent me from whining like a kid. 
<br />
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Last week, I integrated a new set of stepper motors and electronics that Pete Gural and I had built for a set of identical meteor
trackers. This set is much newer and just a little crisper in tracking and overrun and backlash are lessened by maybe one video field or
somehere around 10ms. The change also prevents the need for additional shaft overrun dampening that I'd employed on the old set of motors.  
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<pubDate>Sun, 26 Aug 2007 10:00:00 GMT</pubDate>
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<title>Preparations for imaging the Aurigid outburst;</title> 
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<b>August 17, 2007 </b><br />
We will attempt to integrate a high frame rate spectrograph into the meteor tracker but rather late in the game. I still 
need to drill a series of holes in the mount so it can be positioned precisely where needed. 
I also need to screw small rubber cushioners in to the mount bottom to dampen any vibrations caused by the plane.   

<br /><br />

Preformed several tests of the software as to be able to precisely match the speed of the meteors based on a high
phase angle. It is called fine tuning. The radiant will be behind the plane with gear looking out both sides basically boradside or at a 90 degree angle 
with respect to the radiant. In this case, the full speed of the meteors will be apparent where as looking near
the radiant, the meteors are foreshortened and visually brighter because of a much smaller angle. I think in this
case, it will be best to aim the instrument back towards the radiant as much as possible, in order to gather 
more light as the spectrograph does better with brighter things (as brightness is a function of time with a higher
frame rate; faster the rate, the dimmer the image).  
Additional tests
show placement of the mirrors will allow the meteor to be observed between the middle and edge of the spectrograph 
or camera's FOV, to match up with the diffraction grating blaze angles and while also aligning the spectra 
across the collector's long dimension. In this case, the spectrograph is rotated 90 degrees with respect to up and down.  

<br /><br />
I'm taking a tera-byte disk instead of tapes because I can record the video stream without dropping frames or impacting
the tracker's speed. Firewire made this possible where using USB 2 actually chokes the frame rate down in a strange way. When
the meteor tracker is quiet and not doing anything, the USB 2 data writing drops a frame or two every two or three seconds
where firewire drops maybe only 10 frames per hour. However, when the tracker tracks, no frames are lost ever with 
USB 2. Go figure.


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<pubDate>Sat, 18 Aug 2007 10:00:00 GMT</pubDate>
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<title>Preparations for imaging the Aurigid outburst; Perseids, peak night...</title> 
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<b>August 13, 2007 </b><br />

The skies were pretty skunky but by 3:00am local time, I was able to start shooting. Limiting magnitude was around
mag 3 with thick haze.  The meteor tracker tracked very well.
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<a href="http://www.gvarros.com/gv_081307_085332a.jpg">Click here for larger image</a>
&nbsp;&nbsp; 
<a href="http://www.gvarros.com/gv_081307_085550a.jpg">Image 2</a>
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<img src="http://www.gvarros.com/gv_081307_085332a.jpg" alt="Image of Perseid." width="640"><br />

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<pubDate>Mon, 13 Aug 2007 10:00:00 GMT</pubDate>
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<title>Preparations for imaging the Aurigid outburst; Perseids, the night before peak...</title> 
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<b>August 12, 2007 </b><br />

Had good skies last night into this morning and the meteors were abundant with several Perseids seen and imaged! I spent too little time focusing the high resolution camera, another lesson learned after the fact. Tracking and stability were good.  Stability and backlash dampening is best achieved when velcro (fuzzy side) is used to wrap around the mirror drive shafts. Created mount for high frame-rate spectrograph (not shown) that elevates instrument to around 25 degrees. 
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<a href="http://www.gvarros.com/DSCN3530copy.jpg">Click here for larger image</a><br />

<img src="http://www.gvarros.com/DSCN3530copy.jpg" alt="Image of AIM-IT meteor tracker." width="640"><br />


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<img src="http://www.gvarros.com/gv_081207_043317.jpg" alt="Image of Perseid." width="640"><br />
<a href="http://www.gvarros.com/gv_081207_043317.jpg">Perseid Image 1 (above)</a>
<a href="http://www.gvarros.com/gv_081207_081645.jpg">Perseid Image 2</a>
<a href="http://www.gvarros.com/gv_081207_082424.jpg">Perseid Image 3</a>
<a href="http://www.gvarros.com/gv_081207_083819.jpg">Perseid Image 4</a>


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<pubDate>Sun, 12 Aug 2007 10:00:00 GMT</pubDate>
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<title>Preparations for imaging the Aurigid outburst; the AIM-IT Meteor Tracker</title>
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<b>August 11, 2007 </b><br />

<b>AIM-IT Meteor Tracker</b> This is a picture of the meteor tracker. I'm optimizing and testing things, getting it ready for the Aurigid outburst on September 1. The instrument will be imaging with a high frame rate spectrograph operated and provided by the USAF. The spectrograph is capable of 10,000 frames per second (fps) for much brighter objects but will probably be run around 500 fps for the Aurigids. 
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I will also be imaging the Perseid meteor shower tonight and tomorrow night (Aug 11/12 Aug 12/13) as my location will experience rather good skies for the mid-Atlantic area, for this time of year. 

Typically, only magnitude 2 or brighter stars have been visible for most Perseid events I've viewed from here but this time, it looks really promising and there will be a new moon!  Stay tuned for images!


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<a href="http://www.gvarros.com/meteor_tracker.jpg">Click here for larger image</a>

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<img src="http://www.gvarros.com/meteor_tracker.jpg" alt="Image of AIM-IT meteor tracker." width="640"><br />

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<pubDate>Sat, 11 Aug 2007 10:00:00 GMT</pubDate>
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