Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/25/2019   10:16:14   (   0.30,-127.80) (   1.25,-131.95)  473.70                80
 09/26/2019   09:57:18   (   0.31,-127.76) (   0.25,-127.37)   43.49                80
 09/28/2019   22:00:04   (  -0.30,-127.64) (  -0.38,-128.05)   45.96                80
 09/29/2019   21:43:49   (  -0.31,-127.60) (   0.62,-123.47)  471.44                80
 10/01/2019   10:02:40   (   0.29,-127.57) (   0.54,-128.67)  125.79                80
 10/02/2019   09:46:25   (   0.30,-127.53) (  -0.47,-124.10)  390.94                80
 10/03/2019   22:05:25   (  -0.28,-127.43) (  -0.72,-129.34)  217.17                80
 10/04/2019   21:49:09   (  -0.29,-127.39) (   0.28,-124.76)  299.61                80
 10/06/2019   10:08:01   (   0.27,-127.36) (   0.88,-129.96)  297.90                80
 10/07/2019   09:51:45   (   0.27,-127.31) (  -0.13,-125.39)  218.33                80