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Black Knight Satellite Link From NASA
Ms Sans Serif
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[quote:Halcyon Dayz, FCD:MV8yMTE2MTExXzM1ODEzMjY0XzQxODI5RkFC] [quote:Anonymous Coward 20635949:MV8yMTE2MTExXzM1ODEyODEwX0JDODUyRkM2] Most all satellites are in geosynchronous equatorial orbit. [/quote] More true for communication and weather satellites. Other Earth observation satellites (including spy-sats) and the Iridium system uses polar orbits, gets them global coverage. The Russians like Molniya orbits because so much of their landmass is at higher latitudes. [quote:Anonymous Coward 20635949:MV8yMTE2MTExXzM1ODEyODEwX0JDODUyRkM2] A stable orbit requires the satellite move forward at the same speed it is falling toward earth. [/quote] On average. It doesn't matter which direction though, as long as the orbit doesn't intersect with the Earth (including atmosphere). [quote:Anonymous Coward 20635949:MV8yMTE2MTExXzM1ODEyODEwX0JDODUyRkM2] Due to rotation of earth "coriolis" effect, polar satellites must be assisted by boosters. [/quote] This is and meaningless and nonsense. Because a polar orbit is at right angles with the rotational direction of the Earth you don't get to use the speed benefit of said rotation. IOW, you need to expend more energy to get a satellite in a polar orbit, i.e. a bigger rocket. There's nothing in the laws of physics that prohibits a polar orbit. It does not require energy to maintain an orbit (if high enough). [quote:Anonymous Coward 20635949:MV8yMTE2MTExXzM1ODEyODEwX0JDODUyRkM2] the proof of no polar satellites, google earth..look at north and south poles...notice the blank spots..thats because satellites cannot view that part of earth...unless in true polar orbit.... [/quote] As pointed out above getting a satellite in a 90 degrees orbit is more expensive than getting it in a 89 degrees orbit. And since there are permanent observation stations at both poles it's not always worth the bother. You're using Google Earth as a reference on what satellites can do? Why would Google even buy images of the poles, they'd just be expanses of whiteness. :book: [/quote]
Heard Nasa had removed link, well here it is. THE LINK - [
link to eol.jsc.nasa.gov
All props go to youtuber Streetcap1.
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