Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/18/2021   10:41:01   (   0.01,-137.22) (  -0.65,-134.35)  328.27                80
 11/19/2021   23:00:57   (  -0.01,-137.22) (  -0.61,-139.80)  294.73                80
 11/20/2021   22:45:22   (  -0.01,-137.21) (   0.37,-135.38)  208.46                80
 11/22/2021   11:05:19   (   0.01,-137.21) (   0.80,-140.84)  414.01                80
 11/23/2021   10:49:49   (   0.01,-137.20) (  -0.17,-136.45)   85.78                80
 11/25/2021   22:52:02   (  -0.01,-137.16) (  -0.08,-137.62)   50.92                80
 11/26/2021   22:36:41   (  -0.01,-137.15) (   0.86,-133.25)  444.58                80
 11/28/2021   10:57:00   (   0.00,-137.13) (   0.36,-138.80)  189.40                80
 11/29/2021   10:41:45   (   0.00,-137.12) (  -0.57,-134.46)  302.86                80
 11/30/2021   23:02:23   (  -0.00,-137.08) (  -0.69,-140.08)  341.97                80