# satelite

1. ### Global Positioning System / Clocks in Space

I'm a bit lost at how to exactly start this exercise... As far as I understand we need to first determine $d\tau_E$ and $d\tau_S$. First question: Since we can neglect the earths movement, can I also neglect the movement of the satellite with respect to the far away observer? If so, I...
2. ### A Continuous field image

The Hubble deep field image was constructed by collecting photons from a specific region of space over a continuous duration of time; in this case ten days. As the number of collected photons increase, higher the resolution of the image. If this duration increases, how much more resolution do...
3. ### B Satellite clocks

Something that crossed my mind recently; I know that satellites have to adjust their clock due to their relativistic time variations in relation to us. I was wondering do they adjust their times in accordance to general relativity or special relativity or both? Or is their speed so insignificant...
4. ### Recharge satellite batteries utilizing a ground-based laser?

Is it feasible to recharge satellite's batteries utilizing a ground-based laser?