Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 14.  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   10:14:59   (  -0.05,-128.43) (   0.68,-131.68)  370.72                80
 01/15/2020   09:58:43   (  -0.05,-128.43) (  -0.35,-127.11)  151.36                80
 01/16/2020   22:17:42   (   0.05,-128.43) (  -0.84,-132.34)  446.23                80
 01/17/2020   22:01:27   (   0.05,-128.43) (   0.19,-127.76)   75.58                80
 01/20/2020   10:01:22   (  -0.04,-128.44) (  -0.03,-128.38)    6.70                80
 01/22/2020   22:06:47   (   0.04,-128.42) (  -0.08,-129.05)   71.05                80
 01/23/2020   21:47:50   (   0.03,-128.42) (   0.89,-124.46)  450.13                80
 01/25/2020   10:06:41   (  -0.03,-128.42) (   0.24,-129.67)  142.08                80
 01/26/2020   09:50:26   (  -0.03,-128.41) (  -0.79,-125.09)  378.98                80
 01/27/2020   22:12:05   (   0.04,-128.39) (  -0.41,-130.32)  219.84                80