Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/17/2021   06:53:32   (  -0.12, -75.20) (   0.48, -77.83)  299.63                80
 09/18/2021   06:31:55   (  -0.13, -75.21) (  -0.58, -73.25)  224.04                80
 09/19/2021   18:53:30   (   0.13, -75.21) (  -0.58, -78.45)  368.60                80
 09/20/2021   18:37:11   (   0.13, -75.23) (   0.42, -73.86)  155.89                80
 09/22/2021   06:58:39   (  -0.12, -75.25) (   0.73, -79.03)  430.90                80
 09/23/2021   06:37:01   (  -0.13, -75.27) (  -0.34, -74.45)   93.88                80
 09/24/2021   19:01:16   (   0.12, -75.28) (  -0.89, -79.64)  497.74                80
 09/25/2021   18:39:38   (   0.13, -75.30) (   0.18, -75.06)   27.33                80
 09/28/2021   06:44:47   (  -0.13, -75.35) (  -0.04, -75.64)   33.45                80
 09/29/2021   06:23:09   (  -0.13, -75.37) (  -1.11, -71.06)  491.69                80
 09/30/2021   18:47:25   (   0.13, -75.39) (  -0.06, -76.26)   99.26                80