Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/27/2020   22:20:20   (   0.02,-128.17) (  -0.87,-132.05)  442.59                80
 05/28/2020   21:58:44   (   0.03,-128.16) (   0.19,-127.48)   77.32                80
 05/31/2020   10:03:57   (  -0.01,-128.13) (  -0.00,-128.08)    5.27                80
 06/02/2020   22:06:40   (   0.01,-128.05) (  -0.16,-128.73)   77.53                80
 06/03/2020   21:45:04   (   0.02,-128.03) (   0.90,-124.16)  441.73                80
 06/05/2020   10:09:14   (  -0.00,-128.01) (   0.28,-129.34)  151.35                80
 06/06/2020   09:47:37   (  -0.02,-127.98) (  -0.72,-124.76)  367.14                80
 06/07/2020   22:11:56   (  -0.00,-127.92) (  -0.44,-129.99)  235.83                80
 06/08/2020   21:50:20   (   0.01,-127.89) (   0.56,-125.41)  282.95                80