Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2021   06:46:22   (  -0.08, -75.18) (   0.40, -77.20)  230.54                80
 07/17/2021   06:30:04   (  -0.08, -75.18) (  -0.65, -72.61)  293.17                80
 07/18/2021   18:49:00   (   0.09, -75.19) (  -0.51, -77.82)  299.90                80
 07/19/2021   18:32:43   (   0.09, -75.20) (   0.54, -73.24)  224.03                80
 07/21/2021   06:51:30   (  -0.10, -75.21) (   0.62, -78.41)  365.09                80
 07/22/2021   06:35:13   (  -0.10, -75.22) (  -0.43, -73.83)  158.81                80
 07/23/2021   18:54:08   (   0.11, -75.23) (  -0.77, -79.03)  434.00                80
 07/24/2021   18:37:51   (   0.11, -75.24) (   0.28, -74.45)   90.58                80
 07/26/2021   06:56:38   (  -0.12, -75.27) (   0.88, -79.62)  496.87                80
 07/27/2021   06:40:20   (  -0.11, -75.28) (  -0.17, -75.03)   28.17                80