Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/13/2020   21:58:16   (  -0.01,-127.75) (   0.25,-126.66)  124.96                80
 06/15/2020   10:19:44   (   0.03,-127.72) (   0.98,-131.83)  469.66                80
 06/16/2020   09:58:08   (   0.02,-127.68) (  -0.09,-127.26)   48.02                80
 06/18/2020   22:03:29   (  -0.02,-127.56) (  -0.12,-127.90)   38.76                79
 06/19/2020   21:44:35   (  -0.01,-127.53) (   0.94,-123.33)  478.93                80
 06/21/2020   10:06:04   (   0.02,-127.48) (   0.23,-128.51)  117.04                80
 06/22/2020   09:44:28   (   0.01,-127.44) (  -0.78,-123.93)  399.61                80
 06/23/2020   22:06:06   (  -0.02,-127.34) (  -0.43,-129.15)  206.67                80
 06/24/2020   21:49:49   (  -0.01,-127.29) (   0.58,-124.57)  310.20                80
 06/26/2020   10:11:19   (   0.03,-127.25) (   0.60,-129.76)  286.05                80