Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 1 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/22/2023   10:31:38   (   0.02,-128.21) (   0.12,-128.54)   38.52                80
 01/23/2023   10:15:59   (   0.01,-128.22) (  -0.92,-124.11)  469.04                80
 01/24/2023   22:38:32   (  -0.01,-128.20) (  -0.33,-129.53)  152.52                80
 01/25/2023   22:17:33   (  -0.01,-128.21) (   0.71,-125.10)  354.72                80
 01/27/2023   10:39:58   (   0.01,-128.26) (   0.49,-130.50)  255.57                80
 01/28/2023   10:24:17   (   0.01,-128.27) (  -0.49,-126.06)  251.87                80
 01/29/2023   22:46:51   (  -0.01,-128.25) (  -0.73,-131.49)  369.33                80
 01/30/2023   22:25:50   (  -0.01,-128.25) (   0.26,-127.05)  137.42                80
 02/01/2023   10:48:16   (   0.00,-128.28) (   0.94,-132.45)  474.54                80
 02/02/2023   10:32:35   (   0.00,-128.29) (  -0.06,-128.01)   32.21                80