Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2021   22:09:35   (   0.05,-128.13) (   0.50,-126.17)  223.76                80
 01/01/2022   10:29:16   (  -0.05,-128.17) (   0.70,-131.57)  387.53                80
 01/02/2022   10:13:34   (  -0.05,-128.18) (  -0.30,-127.12)  121.68                80
 01/03/2022   22:33:24   (   0.05,-128.21) (  -0.91,-132.55)  494.36                80
 01/04/2022   22:17:42   (   0.05,-128.23) (   0.10,-128.10)   14.89                80
 01/07/2022   10:19:01   (  -0.05,-128.28) (   0.11,-129.05)   88.06                80
 01/08/2022   10:03:18   (  -0.05,-128.29) (  -0.90,-124.61)  420.98                80
 01/09/2022   22:23:07   (   0.06,-128.32) (  -0.35,-130.02)  195.02                80
 01/10/2022   22:07:25   (   0.05,-128.34) (   0.67,-125.58)  313.96                80
 01/12/2022   10:27:06   (  -0.06,-128.36) (   0.56,-130.97)  298.28                80
 01/13/2022   10:11:24   (  -0.05,-128.37) (  -0.46,-126.53)  210.30                80