Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/19/2021   18:41:48   (   0.13, -75.20) (  -0.02, -75.85)   74.75                80
 08/20/2021   18:25:31   (   0.13, -75.20) (   1.04, -71.27)  448.35                80
 08/22/2021   06:46:58   (  -0.14, -75.21) (   0.14, -76.44)  140.93                80
 08/23/2021   06:25:20   (  -0.14, -75.21) (  -0.92, -71.86)  382.70                80
 08/24/2021   18:46:55   (   0.14, -75.21) (  -0.30, -77.05)  210.58                80
 08/25/2021   18:30:37   (   0.14, -75.22) (   0.76, -72.47)  313.77                80
 08/27/2021   06:52:05   (  -0.15, -75.25) (   0.42, -77.64)  273.66                80
 08/28/2021   06:30:27   (  -0.15, -75.26) (  -0.64, -73.06)  250.79                80
 08/29/2021   18:52:02   (   0.15, -75.27) (  -0.51, -78.27)  341.75                80
 08/30/2021   18:35:44   (   0.15, -75.28) (   0.49, -73.67)  183.00                80
 09/01/2021   06:57:12   (  -0.16, -75.31) (   0.63, -78.86)  403.61                80