Fig. 12.
Earth images from DSCOVR/EPIC for January 2, 2019 and June 2, 2019 showing the superimposed outer circle (white) of clear-sky Min <T90> less than 65 min and the inner circle (white) for Min <T90> less than 50 min when D90 = 40 J/m2. Sunrise is on the left (west) and sunset is on the right (east). The subsolar point is approximately in the center of the circle slightly offset by the small DSCOVR/EPIC orbital view angle. For the calculated RS SARS CoV-2 D90 = 3.2 J/m2, a near-circle (dark-line) with solar zenith angle < 60O centered on the subsolar point would have Min <T90> less than 20 min