Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 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)
 01/14/2020   10:14:58   (  -0.05,-128.43) (   0.71,-131.68)  370.66                80
 01/15/2020   09:58:43   (  -0.05,-128.43) (  -0.33,-127.10)  151.42                80
 01/16/2020   22:17:43   (   0.05,-128.42) (  -0.81,-132.34)  446.45                80
 01/17/2020   22:01:27   (   0.05,-128.43) (   0.22,-127.77)   75.37                80
 01/20/2020   10:04:02   (  -0.04,-128.44) (  -0.06,-128.39)    5.94                80
 01/22/2020   22:04:06   (   0.04,-128.42) (  -0.10,-129.04)   71.37                80
 01/23/2020   21:47:51   (   0.03,-128.41) (   0.93,-124.47)  449.75                80
 01/25/2020   10:06:41   (  -0.03,-128.42) (   0.25,-129.66)  142.27                80
 01/26/2020   09:50:25   (  -0.03,-128.41) (  -0.78,-125.09)  378.77                80