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   (   0.02,-128.17) (   0.35,-126.78)  159.38                80
 08/12/2020   10:18:14   (  -0.02,-128.17) (   0.81,-131.97)  432.97                80
 08/13/2020   10:01:58   (  -0.02,-128.14) (  -0.21,-127.39)   85.73                80
 08/15/2020   22:01:59   (   0.02,-128.01) (   0.02,-128.03)    1.64                80
 08/18/2020   10:04:33   (  -0.03,-127.96) (   0.13,-128.64)   77.26                80
 08/19/2020   09:48:16   (  -0.02,-127.92) (  -0.89,-124.05)  440.57                80
 08/20/2020   22:07:13   (   0.03,-127.82) (  -0.31,-129.27)  166.26                80
 08/21/2020   21:50:57   (   0.03,-127.78) (   0.71,-124.69)  351.53                80
 08/23/2020   10:09:47   (  -0.03,-127.76) (   0.46,-129.88)  242.75                80
 08/24/2020   09:53:31   (  -0.03,-127.71) (  -0.56,-125.30)  274.63                80