| reply to donaldk
Re: Latency? Well,
If they can launch another 702 satellite, better coverage areas, and overlapping redundancy.
To increase performance, the USA DSC3 Satellite has many Flights in obrit, as well as the USA Milstar I and II in addition to its redundant backbones. This is still not enough. High speed multiplexers can incorporate Doppler effect, once again, still not enough.
I am sure the 702 satellite uses a similar Cross Links technology similar to the Milstar II satellite. Other countries use this similar technology.
Instead of having to beam down to ground stations which does cause delays or beam coverage issues caused by the obrit of the earth etc. Traffic can be sped up if the Satellite beams to another satellite line of site in while orbit.
They are also moving typical satellite technology from circuit switching to packet switching. So imagine if the Satellites use OSPF in orbit. Some of these satellites have high speed multiplexers and routers on board to help cut the delay, about 10 to 20ms of delay can be saved.
There is a new move however, to go to light transmission. But the effects of scintillation could be a problem over long distances. I could imagine through the use of light, that the satellite could maybe at most offer 60ms of delay.
Be patient, this is where it will all go. Optical transmission.
As it is KaBand (SHF) Super High Frequency is used on a lot of military and civilian satellite terminals.
I have worked with the L-3 USC-60A and the Harris Corporation LMST Satellite terminals which are both capable of 10Mb/sec bandwidth in hub spoke configuration. 10Mb/sec total network bandwidth is not too shabby. You should see what Ka and Ku band terminals Viasat and TriPoint Global Vertix have in store.
The satellites are evolving and providing better accuracy, equipment range, response time and redundancy.
As previously launched satellites degrade in peformance from the effects of the solar weather, the satellites will be replenished by satellites with capabilities of 2 to fiver different satelites all into one. 1 launch may have full capabilities. 2nd launch may have much more, but less weight. 3 launch will have all 2 and much much more.
Be patient. There will be great advances. |
