Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 8 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/10/2020   21:59:24   (   0.01,-128.17) (   0.32,-126.77)  159.20                80
 08/12/2020   10:18:14   (  -0.02,-128.17) (   0.85,-131.97)  432.90                80
 08/13/2020   10:01:57   (  -0.02,-128.14) (  -0.17,-127.38)   85.78                80
 08/15/2020   22:04:39   (   0.02,-128.01) (   0.04,-128.03)    3.55                80
 08/18/2020   10:04:33   (  -0.02,-127.96) (   0.10,-128.64)   77.28                80
 08/19/2020   09:48:17   (  -0.02,-127.92) (  -0.91,-124.06)  440.61                80
 08/20/2020   22:07:14   (   0.03,-127.81) (  -0.28,-129.28)  166.48                80
 08/21/2020   21:50:57   (   0.02,-127.77) (   0.74,-124.70)  351.33                80
 08/23/2020   10:09:48   (  -0.03,-127.75) (   0.43,-129.89)  242.75                80