Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/14/2021   06:38:24   (  -0.05, -75.19) (  -0.21, -74.60)   68.19                80
 10/16/2021   18:43:41   (   0.05, -75.20) (   0.03, -75.20)    2.42                80
 10/19/2021   06:46:09   (  -0.05, -75.23) (   0.10, -75.78)   63.50                80
 10/20/2021   06:24:31   (  -0.06, -75.24) (  -0.98, -71.20)  461.23                80
 10/21/2021   18:48:46   (   0.04, -75.26) (  -0.22, -76.40)  130.03                80
 10/22/2021   18:27:08   (   0.05, -75.27) (   0.80, -71.80)  395.00                80
 10/24/2021   06:51:14   (  -0.03, -75.30) (   0.35, -76.97)  190.75                80
 10/25/2021   06:29:36   (  -0.04, -75.32) (  -0.67, -72.38)  334.27                80
 10/26/2021   18:53:52   (   0.03, -75.34) (  -0.46, -77.60)  256.61                80
 10/27/2021   18:32:14   (   0.04, -75.36) (   0.57, -73.00)  268.71                80