Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/27/2020   22:12:04   (   0.04,-128.32) (  -0.43,-130.31)  226.99                80
 01/28/2020   21:50:29   (   0.04,-128.30) (   0.61,-125.74)  292.34                80
 01/30/2020   10:11:59   (  -0.04,-128.26) (   0.56,-130.93)  304.20                80
 01/31/2020   09:55:44   (  -0.04,-128.24) (  -0.47,-126.36)  215.09                80
 02/01/2020   22:17:23   (   0.04,-128.21) (  -0.74,-131.58)  384.66                80
 02/02/2020   21:55:48   (   0.03,-128.19) (   0.30,-127.01)  134.10                80
 02/04/2020   10:17:18   (  -0.03,-128.13) (   0.87,-132.21)  463.83                80
 02/05/2020   10:01:02   (  -0.03,-128.10) (  -0.10,-127.62)   54.71                80
 02/07/2020   22:03:45   (  -0.01,-128.03) (  -0.07,-128.27)   27.55                80
 02/08/2020   21:42:10   (  -0.01,-127.99) (   0.97,-123.70)  489.98                80