Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/28/2021   10:54:41   (  -0.00,-137.20) (   0.24,-138.23)  117.47                80
 11/29/2021   10:39:00   (  -0.00,-137.19) (  -0.78,-133.79)  388.25                80
 11/30/2021   22:58:54   (   0.00,-137.19) (  -0.47,-139.23)  233.30                80
 12/01/2021   22:43:13   (   0.00,-137.18) (   0.53,-134.79)  271.83                80
 12/03/2021   11:02:58   (  -0.00,-137.16) (   0.69,-140.19)  346.10                80
 12/04/2021   10:47:17   (   0.00,-137.15) (  -0.28,-135.75)  158.14                80
 12/05/2021   23:07:12   (  -0.00,-137.12) (  -0.92,-141.21)  465.95                80
 12/06/2021   22:51:33   (  -0.01,-137.10) (   0.08,-136.77)   37.66                80
 12/09/2021   10:55:39   (   0.01,-137.05) (   0.18,-137.74)   79.00                80
 12/10/2021   10:34:40   (   0.01,-137.03) (  -0.85,-133.32)  424.07                80