Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/26/2019   22:15:19   (   0.04,-128.17) (  -0.79,-131.77)  411.25                80
 12/27/2019   21:59:03   (   0.03,-128.19) (   0.24,-127.19)  112.74                80
 12/29/2019   10:17:55   (  -0.04,-128.25) (   0.87,-132.41)  473.56                80
 12/30/2019   10:01:40   (  -0.04,-128.27) (  -0.16,-127.83)   50.48                80
 01/01/2020   22:04:24   (   0.04,-128.29) (   0.02,-128.49)   22.57                80
 01/04/2020   10:04:20   (  -0.05,-128.37) (   0.11,-129.12)   85.77                80
 01/05/2020   09:48:04   (  -0.04,-128.38) (  -0.92,-124.55)  437.73                80
 01/06/2020   22:07:04   (   0.05,-128.38) (  -0.25,-129.78)  159.72                80
 01/07/2020   21:50:48   (   0.04,-128.39) (   0.78,-125.21)  363.17                80