Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/11/2020   10:51:37   (  -0.03,-137.21) (   0.59,-140.04)  322.00                80
 04/12/2020   10:30:01   (  -0.03,-137.20) (  -0.40,-135.45)  199.23                80
 04/13/2020   22:51:39   (   0.02,-137.19) (  -0.78,-140.68)  397.56                80
 04/14/2020   22:35:24   (   0.02,-137.19) (   0.27,-136.11)  123.61                80
 04/16/2020   10:56:54   (  -0.01,-137.18) (   0.93,-141.30)  469.67                80
 04/17/2020   10:35:18   (  -0.01,-137.17) (  -0.12,-136.72)   51.15                80
 04/19/2020   22:38:00   (   0.01,-137.14) (  -0.06,-137.36)   25.84                80
 04/20/2020   22:21:45   (   0.01,-137.13) (   0.99,-132.79)  494.88                80
 04/22/2020   10:43:15   (  -0.01,-137.12) (   0.21,-137.98)   99.27                80
 04/23/2020   10:21:40   (  -0.01,-137.10) (  -0.84,-133.41)  420.82                80
 04/24/2020   22:43:18   (   0.01,-137.07) (  -0.33,-138.64)  178.32                80