Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 24.  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) (   0.65,-131.11)  339.28                80
 12/25/2019   09:56:20   (  -0.03,-128.16) (  -0.38,-126.54)  185.26                80
 12/26/2019   22:15:19   (   0.04,-128.17) (  -0.78,-131.77)  411.04                80
 12/27/2019   21:59:03   (   0.03,-128.19) (   0.24,-127.20)  113.10                80
 12/29/2019   10:17:56   (  -0.04,-128.26) (   0.87,-132.41)  472.90                80
 12/30/2019   10:01:40   (  -0.04,-128.28) (  -0.16,-127.84)   51.29                80
 01/01/2020   22:04:24   (   0.04,-128.30) (   0.02,-128.49)   21.47                80
 01/04/2020   10:04:20   (  -0.04,-128.38) (   0.12,-129.12)   84.22                80
 01/05/2020   09:48:04   (  -0.04,-128.40) (  -0.91,-124.55)  439.42                80
 01/06/2020   22:07:04   (   0.04,-128.39) (  -0.26,-129.78)  157.87                80