QUOTE(LP)
Just for the record, I never lacked respect for your work. Again, my joke wasn't aimed specifically at you. You've obviously thought about this a lot.
I know
LP, I beg you to forget what happened, please. My post #134 was not directed to you, it was only a relief of my stress. You have to understand that I'm "fighting" with my opinion, I think with some dignity, a giant of great prestige (NASA). For the average people, I think, what NASA says it's almost a scripture, so, this "fight" it's not a fair one and creates a lot of stress.
Before I engage actively in this debate, a long time ago, I begin for asking questions directly to NASA, but when I entered in scientific fields with difficult questions, they lasted much more time to answer me saying, "we have to pass your question to the appropriate department", and when I insisted because answers, they gave me, are not satisfactory, they had left to answer me. You can trie and you will see.
For instance, see what NASA answered to a question of one girl
here:
QUOTE(NASA)
Radiation Belts and Manned Space Flight
Dear Sir:
Would you please explain how the Van Allen Belt affected the first manned space flights. How were they protected?
Reply
Dear Belinda
All manned flights (except those of Apollo) have stayed below the radiation belt: the Space Shuttle, for instance, orbits at about 215 miles. The atmosphere is very rarefied there, and radiation belt particles descending to that level may well come back without encountering anything. However, such particles have thousands of Earthward excursions each day, so the only ones which are likely to survive long are those that are always confined to higher levels.
A more subtle effect is also at work. The equations governing the motion of trapped particle indicate that each has a characteristic value of magnetic intensity, below which is cannot penetrate. Suppose a particle is reflected by the intensity existing at 215 miles. As it happens, the Earth's magnetic field--its region of magnetic forces--has some irregularities, so in some regions that intensity is only reached at 100 miles. Now and then the particle's orbit will happen to descend in that region, where it penetrates to much deeper (and denser) layers of the atmosphere, and may be quickly lost, even if elsewhere it stays at safe heights. One such notorious region exists above the southern Atlantic Ocean.
So the radiation belt does not reach the levels where Mercury, Gemini, Soyuz and Mir used to orbit and where the Shuttle and Space Station do so now. The early Russian Sputniks failed to discover the radiation belt because they too stayed in such low orbits and Explorers 1 and 3 only detected it because they were rather poorly controlled and rose above 1500 miles.
You will find more on my web sites, e.g.
http://www.phy6.org/Education/wexp13.htmlWhat kind of an answer is that? They talk about everything and does not answer to the question!!! Have they something to hide? These kind of things do not dignify NASA, don't you think?
Now, let's see what mr. William A. Wheaton, Staff Scientist, IPAC, Infrared Processing Center says:
QUOTE(William A. Wheaton)
The time the astronauts would be exposed is fairly easy to calculate from basic orbital mechanics, though probably not something most students below college level could easily verify. You have perhaps heard that to escape from Earth requires a speed of about 7 miles per second, which is about 11.2 km per sec. At that speed, it would require less than an hour to pass outside the main part of the belts at around 38,000 km altitude. However it is a little more complicated than that, because as soon as the rocket motor stops burning, the spacecraft immediately begins to slow down due to the attraction of gravity. At 38,000 km altitude it would actually be moving only about 4.6 km per sec, not 11.2. If we just take the geometric average of these two, 7.2 km per sec, we will not be too far off, and get about 1.5 hours for the time to pass beyond 38,000 km.
His calculations are based on many supositions, and, as you can see, he forgot one basic element:
As you know, 7.2 Km/s = 25,920 Km/h and at this speed the vessel crossed 38,880 Km in 1.5 hour.
The basic element he forgot was:
The direction of the trajectory after Apollo 11 left the Earth orbit. He assumes, with these calculations, that its trajectory was linear, but the real trajectory of Apollo 11 was a spiral around the Earth, not linear. Scientists must be very cautious when they present their calculations.
Now, if you see my calculations, they are based on the scheduled time of NASA, not on supositions, and, I think, they are much more accurate.
I'll answer to the first part of your last post later.
Regards,
Darthy