Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 1 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/11/2023   10:33:18   (   0.00,-128.03) (   0.23,-129.07)  118.27                80
 01/12/2023   10:17:39   (   0.01,-128.06) (  -0.78,-124.64)  390.20                80
 01/13/2023   22:40:13   (  -0.00,-128.03) (  -0.47,-130.07)  232.60                80
 01/14/2023   22:19:14   (  -0.00,-128.05) (   0.55,-125.63)  275.36                80
 01/16/2023   10:41:39   (   0.00,-128.12) (   0.68,-131.03)  331.84                80
 01/17/2023   10:26:00   (   0.00,-128.14) (  -0.33,-126.59)  175.88                80
 01/18/2023   22:48:34   (  -0.01,-128.10) (  -0.90,-132.03)  447.72                80
 01/19/2023   22:27:34   (  -0.01,-128.11) (   0.12,-127.59)   59.16                80
 01/22/2023   10:31:40   (   0.01,-128.17) (   0.09,-128.56)   43.52                80
 01/23/2023   10:16:01   (   0.00,-128.18) (  -0.93,-124.12)  463.21                80
 01/24/2023   22:38:34   (   0.00,-128.14) (  -0.33,-129.55)  160.85                80