Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 1 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/02/2023   22:41:49   (   0.01,-127.76) (  -0.65,-130.57)  320.79                80
 01/03/2023   22:20:50   (   0.00,-127.79) (   0.35,-126.13)  188.31                80
 01/05/2023   10:43:16   (  -0.00,-127.90) (   0.82,-131.54)  415.68                80
 01/06/2023   10:27:37   (   0.00,-127.93) (  -0.18,-127.11)   93.29                80
 01/08/2023   22:31:52   (  -0.00,-127.92) (  -0.07,-128.10)   21.55                80
 01/09/2023   22:10:52   (  -0.01,-127.94) (   0.94,-123.66)  487.09                80
 01/11/2023   10:33:18   (   0.00,-128.04) (   0.23,-129.07)  117.82                80
 01/12/2023   10:17:39   (   0.01,-128.06) (  -0.78,-124.64)  390.72                80
 01/13/2023   22:40:13   (  -0.00,-128.03) (  -0.46,-130.07)  232.72                80
 01/14/2023   22:19:14   (  -0.00,-128.05) (   0.56,-125.64)  275.27                80