SBSP--specific power

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The specific power in kg/kW for a power satellite is a critical number for evaluating the economics of this method of power production.

Multiplied by the cost per kg for the lift to GEO it is the transportation cost of building power satellites.

In order for SBSP to capture market, the cost for an installed kW needs to be around $1600/kW. If the allowed transport cost is $500, then the product of kg/kW and dollars per kg can't exceed $500.

It appears very difficult to reduce the cost to GEO below $100/kg. The requires the specific power to be close to 5kg/kW.

Because of the way SBSP is measured (output of the rectenna) and the 50% transmission loss, the specific power before transmission needs to be 2.5 kg/kW.

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