Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 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)
 04/11/2021   10:31:12   (  -0.03,-137.19) (  -0.68,-134.26)  334.44                80
 04/12/2021   22:55:28   (   0.03,-137.19) (  -0.48,-139.47)  260.21                80
 04/13/2021   22:36:31   (   0.03,-137.18) (   0.55,-134.88)  261.61                80
 04/15/2021   10:57:59   (  -0.03,-137.15) (   0.63,-140.06)  331.36                80
 04/16/2021   10:36:22   (  -0.03,-137.14) (  -0.40,-135.47)  189.88                80
 04/17/2021   22:57:58   (   0.03,-137.12) (  -0.75,-140.69)  406.30                80
 04/18/2021   22:41:40   (   0.03,-137.10) (   0.27,-136.10)  114.61                80
 04/20/2021   11:03:09   (  -0.02,-137.06) (   0.90,-141.27)  479.69                80
 04/21/2021   10:41:31   (  -0.02,-137.04) (  -0.12,-136.69)   40.84                80
 04/23/2021   22:44:09   (   0.01,-136.98) (  -0.05,-137.30)   36.53                80
 04/24/2021   22:27:52   (   0.01,-136.95) (   0.98,-132.71)  483.51                80