Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/21/2021   10:29:29   (  -0.05,-137.19) (  -0.77,-133.98)  366.48                80
 03/22/2021   22:51:06   (   0.04,-137.18) (  -0.43,-139.18)  229.59                80
 03/23/2021   22:34:49   (   0.04,-137.16) (   0.64,-134.61)  292.15                80
 03/25/2021   10:56:17   (  -0.03,-137.15) (   0.57,-139.78)  299.89                80
 03/26/2021   10:34:39   (  -0.03,-137.13) (  -0.44,-135.19)  221.38                80
 03/27/2021   22:56:15   (   0.02,-137.11) (  -0.74,-140.40)  375.80                80
 03/28/2021   22:39:59   (   0.03,-137.09) (   0.33,-135.82)  145.18                80
 03/30/2021   11:01:27   (  -0.02,-137.06) (   0.83,-141.00)  448.07                80
 03/31/2021   10:39:50   (  -0.03,-137.04) (  -0.18,-136.41)   72.30                80
 04/02/2021   22:42:29   (   0.02,-136.97) (   0.03,-137.03)    6.76                80