Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 1 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/09/2023   22:10:52   (  -0.01,-127.94) (   0.96,-123.67)  487.33                80
 01/11/2023   10:33:19   (   0.00,-128.03) (   0.21,-129.08)  118.38                80
 01/12/2023   10:17:38   (   0.01,-128.05) (  -0.74,-124.63)  390.11                80
 01/13/2023   22:40:14   (   0.00,-128.03) (  -0.45,-130.07)  232.90                80
 01/14/2023   22:19:14   (  -0.00,-128.04) (   0.56,-125.64)  275.05                80
 01/16/2023   10:41:39   (   0.00,-128.12) (   0.66,-131.03)  332.05                80
 01/17/2023   10:26:00   (   0.00,-128.14) (  -0.35,-126.60)  175.63                80
 01/18/2023   22:48:34   (  -0.01,-128.10) (  -0.88,-132.03)  448.16                80
 01/19/2023   22:27:34   (  -0.01,-128.10) (   0.08,-127.58)   58.73                80
 01/22/2023   10:31:41   (   0.00,-128.17) (   0.08,-128.56)   43.97                80
 01/23/2023   10:16:01   (   0.00,-128.18) (  -0.94,-124.12)  462.76                80