Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 1 21.  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   10:31:39   (   0.02,-128.21) (   0.09,-128.55)   38.34                80
 01/23/2023   10:15:58   (   0.02,-128.22) (  -0.89,-124.10)  469.16                80
 01/24/2023   22:38:33   (  -0.01,-128.20) (  -0.30,-129.54)  152.32                80
 01/25/2023   22:17:32   (  -0.01,-128.21) (   0.68,-125.09)  354.92                80
 01/27/2023   10:39:57   (   0.01,-128.26) (   0.52,-130.50)  255.39                80
 01/28/2023   10:24:18   (   0.01,-128.27) (  -0.52,-126.06)  252.08                80
 01/29/2023   22:46:50   (  -0.01,-128.25) (  -0.76,-131.48)  369.07                80
 01/30/2023   22:25:51   (  -0.01,-128.25) (   0.29,-127.05)  137.74                80
 02/01/2023   10:48:15   (   0.01,-128.29) (   0.97,-132.44)  474.26                80
 02/02/2023   10:32:36   (   0.00,-128.29) (  -0.09,-128.01)   32.65                80