Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/21/2020   21:50:58   (   0.04,-127.81) (   0.75,-124.70)  354.75                80
 08/23/2020   10:09:48   (  -0.05,-127.79) (   0.40,-129.89)  239.15                80
 08/24/2020   09:53:32   (  -0.05,-127.75) (  -0.61,-125.31)  278.71                80
 08/25/2020   22:12:29   (   0.05,-127.65) (  -0.59,-130.53)  328.15                80
 08/26/2020   21:56:12   (   0.05,-127.60) (   0.43,-125.94)  189.32                80
 08/28/2020   10:15:03   (  -0.06,-127.58) (   0.73,-131.14)  405.61                80
 08/29/2020   09:58:46   (  -0.06,-127.53) (  -0.29,-126.56)  111.57                80
 08/30/2020   22:17:44   (   0.07,-127.42) (  -0.91,-131.77)  496.14                80
 08/31/2020   22:01:27   (   0.07,-127.38) (   0.11,-127.19)   21.06                80
 09/03/2020   10:01:21   (  -0.07,-127.30) (   0.03,-127.80)   56.80                80