Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 1 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/16/2021   10:45:44   (  -0.01,-137.21) (   0.11,-137.61)   46.91                80
 01/17/2021   10:24:08   (  -0.01,-137.21) (  -0.95,-133.04)  475.61                80
 01/18/2021   22:45:45   (   0.01,-137.21) (  -0.22,-138.25)  119.15                80
 01/19/2021   22:29:28   (   0.01,-137.20) (   0.78,-133.66)  403.08                80
 01/21/2021   10:50:57   (  -0.01,-137.19) (   0.34,-138.86)  188.95                80
 01/22/2021   10:29:19   (  -0.01,-137.18) (  -0.67,-134.27)  332.79                80
 01/23/2021   22:50:57   (   0.02,-137.17) (  -0.50,-139.48)  263.46                80
 01/24/2021   22:34:39   (   0.02,-137.16) (   0.50,-134.89)  257.79                80
 01/26/2021   10:56:09   (  -0.02,-137.14) (   0.61,-140.09)  335.69                80
 01/27/2021   10:34:31   (  -0.03,-137.12) (  -0.39,-135.49)  185.01                80
 01/28/2021   22:56:08   (   0.03,-137.09) (  -0.78,-140.71)  412.80                80
 01/29/2021   22:39:51   (   0.03,-137.07) (   0.22,-136.12)  107.64                80