Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 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)
 07/17/2020   10:13:32   (   0.02,-128.40) (   0.44,-130.27)  212.25                80
 07/18/2020   09:51:55   (   0.02,-128.41) (  -0.57,-125.68)  309.97                80
 07/19/2020   22:13:34   (  -0.01,-128.36) (  -0.60,-130.91)  290.85                80
 07/20/2020   21:57:18   (   0.00,-128.36) (   0.47,-126.34)  231.11                80
 07/22/2020   10:18:48   (  -0.01,-128.41) (   0.68,-131.53)  355.57                80
 07/23/2020   09:57:12   (  -0.02,-128.41) (  -0.33,-126.95)  166.08                80
 07/24/2020   22:18:50   (  -0.01,-128.36) (  -0.84,-132.18)  434.81                80
 07/25/2020   22:02:34   (  -0.02,-128.36) (   0.17,-127.59)   87.24                80
 07/27/2020   10:24:04   (   0.02,-128.40) (   0.99,-132.79)  499.73                80
 07/28/2020   10:02:28   (  -0.01,-128.39) (  -0.02,-128.21)   21.04                80
 07/30/2020   22:05:09   (   0.01,-128.32) (  -0.12,-128.85)   60.84                80