Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2019   10:13:33   (   0.33,-127.97) (   0.91,-130.66)  306.68                80
 09/21/2019   09:51:58   (   0.34,-127.93) (  -0.09,-126.09)  210.79                80
 09/22/2019   22:13:38   (  -0.32,-127.85) (  -1.10,-131.32)  395.45                80
 09/23/2019   21:57:23   (  -0.32,-127.82) (  -0.10,-126.75)  121.95                80
 09/25/2019   10:16:14   (   0.30,-127.79) (   1.27,-131.95)  474.95                80
 09/26/2019   09:59:59   (   0.31,-127.75) (   0.21,-127.39)   41.91                80
 09/28/2019   22:00:04   (  -0.30,-127.62) (  -0.40,-128.05)   48.85                80
 09/29/2019   21:43:49   (  -0.31,-127.58) (   0.60,-123.47)  468.24                80
 10/01/2019   10:02:40   (   0.29,-127.55) (   0.56,-128.67)  128.92                80
 10/02/2019   09:46:25   (   0.30,-127.50) (  -0.44,-124.10)  387.52                80
 10/03/2019   22:05:26   (  -0.28,-127.40) (  -0.69,-129.35)  221.65                80