By the time the sound waves should reach the left sundog (if there was one) they must have been heavely weakened. In such a way that the effect became most probably unvisible. At 10km high, an apparent distance of 44° between left and right sundog stands for about 8 km.
My geuss,
Luc
Search found 6 matches
- Thu Feb 25, 2010 11:26 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Exceptional Rocket Waves Destroy Sun Dog (2010 Feb 23)
- Replies: 65
- Views: 17421
- Wed Feb 24, 2010 1:19 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Exceptional Rocket Waves Destroy Sun Dog (2010 Feb 23)
- Replies: 65
- Views: 17421
Re: APOD: Exceptional Rocket Waves Destroy Sun Dog (2010 Feb
Air pressure density ripples, Changing refraction. Slightly . ? Mark Pressure density ripples are rapidly changing pressure variations. As a consequence the gas (air) is periodically heating en cooling with no chance to exchange heat with the surrounding gas (an adiabatic proces). Since temperature...
- Tue Feb 23, 2010 4:14 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Exceptional Rocket Waves Destroy Sun Dog (2010 Feb 23)
- Replies: 65
- Views: 17421
Re: APOD: Exceptional Rocket Waves Destroy Sun Dog (2010 Feb
Hey guys! I find all the talk about breaking the sound barrier and sonic booms confusing. If the rocket was going at mach 1 or faster, there would be no shock waves travelling ahead of the rocket - only in a cone shape behind it. Visually, that seems not to be the case. At the time the ripples appe...
- Tue Feb 23, 2010 9:47 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Exceptional Rocket Waves Destroy Sun Dog (2010 Feb 23)
- Replies: 65
- Views: 17421
Re: APOD: Exceptional Rocket Waves Destroy Sun Dog (2010 Feb
Looking at the form of the ripples I would think this are rather sound waves, probably subsonic, produced by the blast of the rocket. An estimation of the wavelength may help to confirm or contradict this hypothese.
Luc
Luc
- Wed Mar 05, 2008 7:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD of ISS (05 Mar 2008)
- Replies: 7
- Views: 2558
At the time of undocking the ISS was halfway between South Africa and Australia (S 27° E 77°) Hope this helps to identify the underlaying landmarks. Allow for serious errors due to uncertainty in the time the picture was taken. Since the sun is shining from the left site (at 9h24m UT) the camera poi...
- Wed Mar 05, 2008 11:32 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD of ISS (05 Mar 2008)
- Replies: 7
- Views: 2558