Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/25/2020   22:02:33   (  -0.01,-128.37) (   0.14,-127.58)   88.68                80
 07/27/2020   10:24:03   (   0.01,-128.43) (   1.01,-132.78)  496.62                80
 07/28/2020   10:02:28   (   0.01,-128.43) (  -0.06,-128.21)   25.54                80
 07/30/2020   22:05:09   (  -0.02,-128.37) (  -0.15,-128.84)   54.63                80
 07/31/2020   21:48:53   (  -0.02,-128.36) (   0.92,-124.27)  467.21                80
 08/02/2020   10:10:23   (   0.02,-128.41) (   0.24,-129.46)  119.19                80
 08/03/2020   09:48:47   (   0.02,-128.41) (  -0.77,-124.88)  402.28                80
 08/04/2020   22:10:24   (  -0.02,-128.34) (  -0.43,-130.10)  200.38                80
 08/05/2020   21:54:08   (  -0.02,-128.34) (   0.58,-125.51)  321.16                80
 08/07/2020   10:15:39   (   0.02,-128.39) (   0.53,-130.72)  265.41                80