Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 9 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)
 09/17/2021   22:55:02   (  -0.03,-137.19) (  -0.41,-138.87)  191.84                80
 09/18/2021   22:38:44   (  -0.03,-137.19) (   0.65,-134.29)  331.21                80
 09/20/2021   10:57:32   (   0.02,-137.20) (   0.50,-139.47)  257.92                80
 09/21/2021   10:41:13   (   0.02,-137.20) (  -0.51,-134.87)  265.14                80
 09/22/2021   23:00:08   (  -0.02,-137.18) (  -0.66,-140.08)  330.16                80
 09/23/2021   22:43:50   (  -0.02,-137.17) (   0.35,-135.48)  192.61                80
 09/25/2021   11:02:37   (   0.02,-137.17) (   0.80,-140.66)  397.24                80
 09/26/2021   10:46:19   (   0.02,-137.16) (  -0.21,-136.06)  125.00                80
 09/27/2021   23:05:14   (  -0.02,-137.13) (  -0.96,-141.27)  471.84                80
 09/28/2021   22:48:57   (  -0.01,-137.12) (   0.10,-136.68)   49.90                80