Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 4 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/16/2020   21:54:21   (   0.20,-127.93) (   0.54,-126.55)  158.74                80
 04/18/2020   10:18:32   (  -0.17,-127.98) (   0.66,-131.74)  428.22                80
 04/19/2020   09:56:56   (  -0.18,-128.00) (  -0.39,-127.17)   96.00                80
 04/20/2020   22:21:14   (   0.16,-128.04) (  -0.84,-132.38)  495.22                80
 04/21/2020   21:59:38   (   0.17,-128.07) (   0.21,-127.81)   29.27                80
 04/24/2020   10:04:53   (  -0.16,-128.13) (  -0.07,-128.43)   34.28                80
 04/25/2020   09:43:17   (  -0.18,-128.15) (  -1.12,-123.85)  489.21                80
 04/26/2020   22:07:36   (   0.15,-128.17) (  -0.05,-129.08)  103.58                80
 04/27/2020   21:46:00   (   0.16,-128.19) (   1.00,-124.51)  419.78                80
 04/29/2020   10:10:11   (  -0.13,-128.22) (   0.18,-129.70)  168.64                80