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The 4 minute window is also a fun one. With the LEO altitude listed as between 600 and 650 Km, and if we call it 625 km, that gives it a period of about 96 minutes. This gives it 3.75 passes during out twilight window. But we don't know when those windows will start or or end. As in, the first window might happen .5 hours onto twilight or the last window might be 1.5 hours before twilight ends, both scenarios wasting the remaining time, but we have a guaranteed 3 passes, and at least half the nights a bonus 4th pass either at the start or the end.

If each pass is 4 minutes, we get a total 'illumination' time of 14 minutes per night.

At $40/MW/hr we can also call it $0.6666/MW/min. Or, with out 150 MW farm this comes out to a clean $100/minute. And at 14 minutes per night we are making $1400.

To pay off the OG solar sat it will take about 1428.5 nights, or just under 4 years. To pay off the cheap sat it will take about 214.25 nights