4. SOLAR POWER SATELLITE A HUGE SOLAR COLLECT0R MADE UP OF SOLAR CELLS A MICRO WAVE ANTENNA ON THE SATELLITE AIMED AT EARTH AN ANTENNA OCCUPYING A LARGE AREA ON THE EARTH TO COLLECT THE POWER
5. SOLAR DISC EARTH POINTING DISC OF SIZE 3 TO 6 KM DIA .THE DISC IS CONTINUALLY SUN FACING THE CONCEPT IS ASSUMED TO TRANSMIT 5.8 GHZ FROM AN OPERATIONAL GEO LOCATION AT A TRANSMITTED POWER LEVEL OF 2.8 GW
6. MICROWAVE POWER TRANSMISSION TO TRANSMITT THE POWER THROUGH OUTER SPACE OR THROUGH THE ATMOSPHERE WITHOUT NEED OF WIRES GENRATED BY USING CAVITY MAGNETRONS
7. RECTENNA USED TO DIRECTLY CONVERT MICROWAVE ENERGY INTO DC ELECTRICITY CONSTRUCTED FROM A SCHOTTKY DIODE PLACED BETWEEN ANTENNA DIPOLES
8. LAUNCH COSTS CURRENT RATES ON THE SPACE SHUTTLE RUN BETWEEN $3000 & $5000/POUND THOUSANDS OF ROCKET LAUNCHES COULD VERY WELL REDUCE THE COSTS BY 10 TO 20 TIMES THE HIGH CONSTRUCTION COST OF SPS BECOME FAVOURABLE DUE TO THERE LOW COST DELIVERY OF POWER
9. CONCLUSIONS RENEWABLE ENERGY IS A COMPELLING APPROACH BOTH PHILOSOPHICALLY AND IN ENGINEERING TERMS SPS APPEAR TO POSSESS MANY SIGNIFICANT ENVIRONMENTAL ADVANTAGES WHEN COMPARED TO ALTERNATIVE APPROACHES TO MEETING THE INCREASED ENERGY DEMAND