Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 12 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/28/2021   10:05:27   (  -0.05,-128.07) (  -0.68,-125.18)  328.98                80
 12/29/2021   22:25:18   (   0.06,-128.11) (  -0.49,-130.62)  286.32                80
 12/30/2021   22:09:35   (   0.05,-128.13) (   0.51,-126.18)  223.36                80
 01/01/2022   10:29:17   (  -0.06,-128.16) (   0.69,-131.57)  387.76                80
 01/02/2022   10:13:34   (  -0.05,-128.18) (  -0.31,-127.12)  121.37                80
 01/03/2022   22:33:25   (   0.05,-128.20) (  -0.90,-132.55)  495.27                80
 01/04/2022   22:17:41   (   0.05,-128.22) (   0.05,-128.10)   13.97                80
 01/07/2022   10:19:01   (  -0.05,-128.27) (   0.10,-129.05)   89.00                80
 01/08/2022   10:03:17   (  -0.05,-128.29) (  -0.85,-124.60)  419.95                80
 01/09/2022   22:23:08   (   0.06,-128.31) (  -0.34,-130.03)  196.60                80
 01/10/2022   22:07:25   (   0.05,-128.32) (   0.68,-125.58)  312.26                80