Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/12/2020   21:56:07   (   0.04,-128.41) (   0.46,-126.48)  219.66                80
 01/14/2020   10:14:59   (  -0.05,-128.43) (   0.67,-131.68)  370.60                80
 01/15/2020   09:58:43   (  -0.05,-128.43) (  -0.36,-127.11)  151.42                80
 01/16/2020   22:17:42   (   0.05,-128.42) (  -0.83,-132.34)  446.70                80
 01/17/2020   22:01:27   (   0.05,-128.42) (   0.20,-127.76)   75.03                80
 01/20/2020   10:04:02   (  -0.04,-128.44) (  -0.04,-128.38)    5.86                80
 01/22/2020   22:04:06   (   0.04,-128.41) (  -0.12,-129.04)   71.84                80
 01/23/2020   21:47:50   (   0.03,-128.41) (   0.92,-124.46)  449.26                80
 01/25/2020   10:06:40   (  -0.03,-128.41) (   0.26,-129.66)  142.60                80