Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/25/2021   22:50:39   (  -0.00,-137.20) (  -0.00,-137.27)    7.61                80
 11/26/2021   22:34:58   (  -0.00,-137.20) (   0.98,-132.83)  498.59                80
 11/28/2021   10:54:41   (   0.00,-137.20) (   0.22,-138.23)  117.73                80
 11/29/2021   10:39:00   (   0.00,-137.19) (  -0.74,-133.78)  387.72                80
 11/30/2021   22:58:54   (  -0.00,-137.17) (  -0.44,-139.23)  234.35                80
 12/01/2021   22:43:14   (  -0.00,-137.16) (   0.55,-134.80)  270.52                80
 12/03/2021   11:02:58   (   0.00,-137.15) (   0.67,-140.20)  347.63                80
 12/04/2021   10:44:37   (   0.01,-137.13) (  -0.30,-135.76)  156.29                80
 12/05/2021   23:07:12   (  -0.00,-137.10) (  -0.96,-141.20)  468.35                80
 12/06/2021   22:51:32   (  -0.00,-137.08) (   0.05,-136.76)   34.97                80
 12/09/2021   10:55:39   (  -0.00,-137.02) (   0.16,-137.75)   82.26                80