Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/28/2020   10:30:50   (   0.04,-137.20) (  -0.59,-134.51)  307.88                80
 09/29/2020   22:49:48   (  -0.03,-137.19) (  -0.59,-139.73)  289.57                80
 09/30/2020   22:33:31   (  -0.03,-137.18) (   0.43,-135.15)  232.09                80
 10/02/2020   10:52:21   (   0.03,-137.18) (   0.72,-140.34)  359.46                80
 10/03/2020   10:36:04   (   0.03,-137.17) (  -0.31,-135.76)  161.92                80
 10/04/2020   22:55:03   (  -0.03,-137.15) (  -0.88,-140.98)  436.44                80
 10/05/2020   22:38:46   (  -0.03,-137.14) (   0.15,-136.40)   84.47                80
 10/08/2020   10:41:18   (   0.03,-137.11) (   0.03,-137.00)   12.12                80
 10/10/2020   22:41:20   (  -0.02,-137.05) (  -0.18,-137.64)   68.67                80
 10/11/2020   22:25:03   (  -0.02,-137.02) (   0.84,-133.06)  451.00                80