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непонял скорость до земли от марсохода, между марсоходом и двумя марсианскими спутниками 100 и 250Мбит а от них ?

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Не мегабит, нет...

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непонял скорость до земли от марсохода, между марсоходом и двумя марсианскими спутниками 100 и 250Мбит а от них ?

Там скорости далеко не мегабитные.

 

2.2.1 38BX-Band

2.2.1.1 57BDownlink (DTE)

The SSPA transmits 15 W and receives its RF input signal from the rover SDST. The basic

telecom requirement for surface operations on the HGA is to provide a downlink capability of at

least at 160 bits per second (bps) to a 34-m station or 800 bps to a 70-m station.

2.2.1.2 58BUplink (DFE)

Current DFE planning is to use the HGA for the typical daily uplink of commands, taking

approximately 15 minutes for a total volume of 225 kilobits (kb). Typical uplink rates to the

HGA will be 1 kbps or 2 kbps. The 15 minutes provides some margin for possible station

transmitter delays and for packaging of commands into groups.

In safe mode, commands from the Earth will be received via the RLGA. The RLGA has a broad

pattern and does not have pointing capability like the HGA. The RLGA does, however, have the

capability for uplink (command) communications (15 bits per second at max range).

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