Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 12 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/17/2020   10:13:58   (   0.09,-128.21) (   0.45,-129.78)  179.08                80
 12/18/2020   09:52:21   (   0.07,-128.22) (  -0.60,-125.20)  343.92                80
 12/19/2020   22:16:38   (  -0.11,-128.25) (  -0.61,-130.41)  246.04                80
 12/20/2020   21:55:01   (  -0.08,-128.26) (   0.44,-125.83)  276.66                80
 12/22/2020   10:19:11   (   0.12,-128.25) (   0.73,-131.02)  314.73                80
 12/23/2020   09:57:34   (   0.10,-128.26) (  -0.33,-126.44)  208.13                80
 12/24/2020   22:21:50   (  -0.14,-128.29) (  -0.88,-131.65)  381.80                80
 12/25/2020   22:00:14   (  -0.12,-128.30) (   0.18,-127.07)  140.50                80
 12/27/2020   10:24:22   (   0.16,-128.27) (   1.05,-132.24)  452.18                80
 12/28/2020   10:02:46   (   0.14,-128.27) (  -0.00,-127.66)   69.93                80
 12/30/2020   22:05:26   (  -0.17,-128.29) (  -0.15,-128.29)    2.20                80