What caught my attention and made me start checking out the sound to light delay was the whole composition of the video. The rhythmic motion of the waves is often used as an animation trick to give the feeling of depth. As you say this was real footage I believe you and would have to say it was visually intriguing. A lens can play tricks on judging distances and I had supposed the distance greater than 100 meters. I like science that also appeals as art.

Imamura Akira wrote:

On Sun, 14 Dec 2003 19:04:52 -0500
Alex Fraser <[EMAIL PROTECTED]> wrote:


I was trying to figure the distance of the camera from the rocket by using see to sound. Didn't seem right to me, was this a fancy animation?
http://www.jaxa.jp/news_topics/column/no3/img/rvt9.mpg




It's not a fancy animation :-)

I've telephoned today and asked one of the staff, Mr. Kobayashi,
at the Noshiro Testing Center (NTC).

He told me that the video was recorded from the top of the
Vertical Firing Test Stand about 25 meters high (about 81 feet
high) with an unmaned camera, and the distance from the rocket
to the camera was about 100 meters (about 327 feet).

He also told me the sound also was recorded with the camere.
The countdown voice came through a loud outside speaker at
the NTC, and was recorded at the same time.


Noshiro Testing Center (NTC) http://www.jaxa.jp/about/centers/ntc/index_e.html

 the facilities layout
 http://www.jaxa.jp/about/centers/ntc/map_e.html

 Map
 http://www.jaxa.jp/about/centers/ntc/traffic_e.html



Imamura Akira
[EMAIL PROTECTED]



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