Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 12 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/29/2021   22:25:17   (   0.06,-128.11) (  -0.53,-130.61)  286.06                80
 12/30/2021   22:09:35   (   0.05,-128.13) (   0.48,-126.17)  223.69                80
 01/01/2022   10:29:16   (  -0.05,-128.17) (   0.73,-131.56)  387.52                80
 01/02/2022   10:13:34   (  -0.05,-128.18) (  -0.28,-127.12)  121.66                80
 01/03/2022   22:33:24   (   0.05,-128.21) (  -0.93,-132.55)  494.54                80
 01/04/2022   22:17:41   (   0.05,-128.23) (   0.08,-128.10)   14.51                80
 01/07/2022   10:19:00   (  -0.05,-128.27) (   0.13,-129.05)   88.17                80
 01/08/2022   10:03:18   (  -0.05,-128.29) (  -0.88,-124.60)  420.82                80
 01/09/2022   22:23:08   (   0.06,-128.32) (  -0.30,-130.03)  195.33                80
 01/10/2022   22:07:25   (   0.05,-128.33) (   0.65,-125.58)  313.64                80
 01/12/2022   10:27:07   (  -0.06,-128.36) (   0.51,-130.98)  298.50                80