By the speed of things, NGAD will be made obsolete by the time it comes up.
China's Space Program Thread II
- Thread starter Blitzo
- Start date
By the speed of things, NGAD will be made obsolete by the time it comes up.
That's what I have been saying. Flood the space with spy satellites. Get those satellites to lock in those stealth planes from the ground, take off, in the air and landing.. They cannot hide.
Satellites can provide exact coords to the missile launchers.
Satellites can provide exact coords to the missile launchers.
Are satellites capable to tracking aircraft non-visually? Because if they rely on vision, then obviously they will lose track at night time.
I don't think military satellites take a break at night.
This is what success city looks like in SimCity....but in real life. Is this in Hainan?
unfortunately Xuntian still has a mirror diameter a little smaller than Hubble's. The good part is that it will have a much better sensor which gives it a bigger field of view.
It compares well to the next gen US telescope though.
There is nothing unfortunate. The 2m diameter is NOT due to capability of making larger, it is because of the constraint of the spacecraft.
Hubble is 4.2m at its widest. Xuntian is 4.5m. Their sizes are limited by the payload fairing of CZ-5B (5.2m) or payload bay of Space Shuttle (4.6m). The reason that Xuntian's mirror is relatively smaller than Hubble is because Xuntian uses “off-axis three-mirror optical system”, this requires space on the side of the main 2m mirror. It works like following
Hubble uses coaxial system where all mirrors are set in the same axis, there is a hole in the main mirror, light in the center from object is blocked by a secondary mirror. Here is how does Hubble look.
Hubble has bigger mirror at the cost of lower performance. See the comparison of the two systems.
