Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/22/2021   18:42:19   (   0.05, -75.18) (  -0.22, -76.38)  137.70                80
 06/23/2021   18:26:02   (   0.04, -75.17) (   0.82, -71.80)  384.62                80
 06/25/2021   06:44:48   (  -0.05, -75.16) (   0.37, -76.96)  206.55                80
 06/26/2021   06:28:30   (  -0.05, -75.15) (  -0.68, -72.38)  315.96                80
 06/27/2021   18:47:27   (   0.06, -75.14) (  -0.51, -77.59)  279.02                80
 06/28/2021   18:31:09   (   0.06, -75.14) (   0.54, -73.00)  244.31                80
 06/30/2021   06:49:57   (  -0.06, -75.15) (   0.60, -78.18)  344.82                80
 07/01/2021   06:33:38   (  -0.06, -75.15) (  -0.39, -73.58)  178.91                80
 07/02/2021   18:52:35   (   0.07, -75.16) (  -0.73, -78.80)  414.77                80
 07/03/2021   18:36:17   (   0.07, -75.17) (   0.26, -74.20)  109.50                80
 07/05/2021   06:55:04   (  -0.08, -75.19) (   0.88, -79.38)  478.29                80
 07/06/2021   06:38:47   (  -0.08, -75.20) (  -0.17, -74.80)   45.92                80