Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 12 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/27/2021   10:21:10   (  -0.05,-128.05) (   0.29,-129.64)  181.07                80
 12/28/2021   10:05:27   (  -0.05,-128.07) (  -0.71,-125.19)  328.94                80
 12/29/2021   22:25:17   (   0.06,-128.11) (  -0.52,-130.62)  286.60                80
 12/30/2021   22:09:35   (   0.05,-128.13) (   0.48,-126.17)  223.00                80
 01/01/2022   10:29:16   (  -0.06,-128.16) (   0.72,-131.56)  388.06                80
 01/02/2022   10:13:34   (  -0.05,-128.18) (  -0.28,-127.12)  120.96                80
 01/03/2022   22:33:24   (   0.05,-128.20) (  -0.93,-132.55)  495.90                80
 01/04/2022   22:17:42   (   0.05,-128.22) (   0.07,-128.10)   12.99                80
 01/07/2022   10:19:00   (  -0.05,-128.26) (   0.14,-129.05)   89.72                80
 01/08/2022   10:03:18   (  -0.05,-128.28) (  -0.86,-124.60)  419.13                80
 01/09/2022   22:23:08   (   0.06,-128.30) (  -0.33,-130.03)  197.70                80