Computing power of satellite

1. It's not about computers. Although it's very complicated to go to the moon, and at that time, the computer instry couldn't run well when Apollo went to the moon, the cancellation of unimportant operations still ensured the landing. Nowadays, the computing power of many satellites is not so strong, and the main requirement for going to space is to be stable, I remember the processor model of the Mars rover landing on Mars: IBM rad 750 processor (PowerPC Architecture)
main frequency: 200 MHz
proction process: 150 nm
secondary cache: 256 KB
computing power: 266 ~ 400 MIPS (Atom Processor: 3300 MIPs)
number of transistors: 10 million
full load: 5 W
operating environment: 1.5 w
operating environment: 1.5 W Centigrade - 55 ℃ ~ 125 ℃
with RAM: 256 MB
with SSD: 2GB
with operating system: VxWorks

this u is the most high-end u carried on human spacecraft so far
in terms of processing power, such a guy can't compare with any personal PC, that is, your home computer, but the power consumption is only 5W, and he can work at minus 55 to 125 degrees. It's not easy. The temperature in space changes from minus 200 degrees to above 200 degrees very quickly. It's very safe to have such a high limit CPU

2.

Due to the complex and harsh space environment, in order to improve the reliability of the chip, the density of the computing units on the chip will be controlled very low, resulting in the relatively poor computing power, but at the same time, the reliability will become extremely high, not as simple as the x86. Therefore, the software carried by the satellite should still strictly control the amount of calculation to avoid unnecessary calculation. Space class chips remain the focus of the US and EU embargo on China

e to the complex and harsh space environment, in order to improve the reliability of the chip, the density of the computing units on the chip will be controlled very low, resulting in the relatively poor computing power, but at the same time, the reliability will become extremely high, not as simple as the x86. Therefore, the software carried by the satellite should still strictly control the amount of calculation to avoid unnecessary calculation. Space class chips remain the focus of the US and EU embargo on China

3. Satellite in space, no external force work, mechanical energy conservation
mechanical energy is the sum of kinetic energy and potential energy
kinetic energy and potential energy can be transformed into each other
as long as we know its kinetic energy change, we can calculate the work done by gravity.

4. Of course, Gravitation (centripetal force of circular motion)

F = [g (M earth) (M satellite)] / (R radius of motion) ^ 2

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