Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 1 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/19/2023   22:27:33   (  -0.02,-128.14) (   0.09,-127.58)   63.81                80
 01/22/2023   10:31:39   (   0.01,-128.21) (   0.09,-128.55)   38.63                80
 01/23/2023   10:15:59   (   0.01,-128.22) (  -0.95,-124.11)  468.79                80
 01/24/2023   22:38:33   (  -0.01,-128.20) (  -0.30,-129.54)  152.93                80
 01/25/2023   22:17:32   (  -0.01,-128.21) (   0.68,-125.10)  354.24                80
 01/27/2023   10:39:57   (   0.00,-128.25) (   0.52,-130.50)  256.05                80
 01/28/2023   10:24:18   (   0.00,-128.26) (  -0.52,-126.06)  251.35                80
 01/29/2023   22:46:50   (  -0.00,-128.24) (  -0.76,-131.48)  370.03                80
 01/30/2023   22:25:51   (  -0.00,-128.25) (   0.29,-127.05)  136.68                80
 02/01/2023   10:48:16   (  -0.00,-128.28) (   0.91,-132.45)  475.33                80