2% is about the ratio of earth cross section area to Argentina surface, that sums up. Proximity should not impact the efficiency as the Sun is not a point sour

2% is about the ratio of earth cross section area to Argentina surface, that sums up. Proximity should not impact the efficiency as the Sun is not a point source and what is important is effectively the ratio of lit/shaded surface. Now that’s 2.8 millions of square km that is 2.8e12 square meters. Mylar at 7g per square meter would mean sending up 19.6e6 tons for the sail only. Low orbit future best payload seems to be 250 tons, the sail would then take about 8000 rocket launches if I’m correct. And then the sail’s structure, moving it to high orbit, the steering system to manage the tremendous solar pressure, etc…