I feel it is worthwhile to include this final post on this thread of mine (not Kathy) that you can find if you dig far enough into the previously attached link. Thankfully, CNN has decided (I think) to allow this post to exist. Anyway, while not as certain as I previously was...I still think there is PLENTLY of room for 2 route options. DaveS Spontaneous • an hour ago Thank you for the intelligent contribution. I was unaware that Geostationary satellites had sinusoidal deviations from the equator. Doing at bit a research I found that this particular satellite was 64km north of the equator (projected to the earths surface) for the final ping. These excursions are minimized by thrusters aboard these VERY high satellites that are typically held to +/- 30 miles. The nature of the orbit (excluding the gravitational effects of the sun, moon, Rosanne Barr) is pretty much sinusoidal with 1 large deviation to the north, and 1 large deviation to the south per day. Because these deviations occur while orbiting over a rotating planet, it would appear to a ground observer standing directly beneath the satellite, to be moving to the north for 12 hours, and then moving to the south for 12 hours. ASSUMING this satellite had a LARGE deviation and was due for thruster correction lets say it moved 60miles to the north of the equator, followed by 60 miles to the south of the equator every day over the same spot. That would equate to 60 up from the equator, 60 down to the equator, another 60 down below the equator, and another 60 up to the equator every day, for a total of 240 vertical displacement miles per 24 hours or 10 mph average. Now another detail that I hadnt really appreciated until today was the ping response from Flight 370s engines. It wasnt a single PING. But as series of responses....say 100, each separated by...let say 100ns. Now, lets imagine the plane is stationary...but the receiver is walking away at 10mph (Ok jog), the 100 signals might (I am too lazy at this point to do the math) arrive at the receiver separated by 101ns. Verses the stationary plane, with the receiver walking at 10mph toward the plane, the signals MIGHT arrive at 99ns apart. Again Im too lazy to do the math but you get the point...I hope. THIS IS HOW DOPPLER WAS APPLIED to elimate the northern route. The pings had a better separation match on the southern route verses the northern route, given the known satellite wander direction and velocity...but wait. We ARE STILL TALKING 10mph! AND THAT IS GENEROUS!!!. If the plane changed coarse by 1 degree, or sped up from 510mph to 520mph the entire thing falls apart.
Posted on: Thu, 27 Mar 2014 02:47:17 +0000
Trending Topics
Recently Viewed Topics
© 2015