Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/15/2021   22:14:20   (   0.19,-127.91) (  -0.34,-130.22)  263.59                80
 02/16/2021   21:58:03   (   0.19,-127.95) (   0.72,-125.64)  262.95                80
 02/18/2021   10:19:31   (  -0.19,-127.96) (   0.47,-130.82)  326.03                80
 02/19/2021   09:57:54   (  -0.19,-127.99) (  -0.60,-126.24)  199.67                80
 02/20/2021   22:19:32   (   0.18,-128.06) (  -0.59,-131.45)  386.46                80
 02/21/2021   22:03:15   (   0.18,-128.09) (   0.48,-126.88)  139.35                80
 02/23/2021   10:24:42   (  -0.17,-128.10) (   0.71,-132.05)  450.11                80
 02/24/2021   10:03:05   (  -0.17,-128.12) (  -0.29,-127.46)   74.78                80
 02/26/2021   22:08:26   (   0.16,-128.20) (   0.19,-128.10)   11.92                80