Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2019   10:12:35   (  -0.04,-128.14) (   0.63,-131.12)  339.18                80
 12/25/2019   09:56:20   (  -0.03,-128.17) (  -0.40,-126.54)  185.40                80
 12/26/2019   22:15:19   (   0.04,-128.17) (  -0.76,-131.78)  410.85                80
 12/27/2019   21:59:04   (   0.03,-128.19) (   0.26,-127.20)  113.34                80
 12/29/2019   10:17:55   (  -0.04,-128.26) (   0.90,-132.40)  472.51                80
 12/30/2019   10:01:39   (  -0.04,-128.28) (  -0.12,-127.83)   51.69                80
 01/01/2020   22:01:43   (   0.04,-128.31) (  -0.01,-128.49)   20.88                80
 01/04/2020   10:04:19   (  -0.04,-128.39) (   0.14,-129.11)   83.50                80
 01/05/2020   09:48:04   (  -0.04,-128.41) (  -0.89,-124.54)  440.23                80