Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/22/2020   10:18:48   (   0.01,-128.42) (   0.68,-131.53)  354.36                80
 07/23/2020   09:57:12   (   0.01,-128.42) (  -0.33,-126.95)  168.17                80
 07/24/2020   22:18:50   (  -0.01,-128.38) (  -0.84,-132.18)  432.43                80
 07/25/2020   22:02:34   (  -0.01,-128.38) (   0.17,-127.59)   90.04                80
 07/27/2020   10:24:04   (   0.01,-128.44) (   0.98,-132.79)  495.66                80
 07/28/2020   10:02:27   (   0.02,-128.44) (  -0.03,-128.20)   26.37                80
 07/30/2020   22:05:09   (  -0.03,-128.38) (  -0.12,-128.85)   53.47                80
 07/31/2020   21:48:53   (  -0.03,-128.37) (   0.89,-124.27)  468.23                80
 08/02/2020   10:10:23   (   0.03,-128.42) (   0.28,-129.46)  118.59                80
 08/03/2020   09:48:47   (   0.04,-128.41) (  -0.73,-124.87)  402.84                80
 08/04/2020   22:10:25   (  -0.04,-128.35) (  -0.42,-130.10)  199.50                80