Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/12/2021   09:59:41   (  -0.12,-128.36) (  -0.55,-126.55)  207.74                80
 03/13/2021   22:21:17   (   0.11,-128.41) (  -0.67,-131.75)  381.82                80
 03/14/2021   22:05:00   (   0.11,-128.42) (   0.40,-127.18)  141.87                80
 03/16/2021   10:26:28   (  -0.10,-128.40) (   0.80,-132.35)  449.98                80
 03/17/2021   10:04:51   (  -0.11,-128.40) (  -0.27,-127.77)   72.73                80
 03/19/2021   22:10:10   (   0.10,-128.43) (   0.09,-128.39)    5.03                80
 03/22/2021   10:12:41   (  -0.09,-128.41) (   0.05,-128.98)   65.74                80
 03/23/2021   09:51:03   (  -0.09,-128.40) (  -0.97,-124.39)  456.01                80
 03/24/2021   22:12:41   (   0.08,-128.41) (  -0.16,-129.61)  136.97                80
 03/25/2021   21:56:23   (   0.08,-128.40) (   0.86,-125.03)  385.24                80