Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 11 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/18/2019   09:56:50   (   0.08,-128.52) (  -0.33,-126.68)  209.63                80
 11/19/2019   22:15:50   (  -0.05,-128.47) (  -0.80,-131.93)  392.95                80
 11/20/2019   21:59:35   (  -0.06,-128.47) (   0.21,-127.35)  127.95                80
 11/22/2019   10:18:26   (   0.04,-128.49) (   0.98,-132.55)  462.99                80
 11/23/2019   10:02:11   (   0.05,-128.48) (  -0.04,-127.97)   57.68                80
 11/25/2019   22:02:15   (  -0.05,-128.42) (  -0.12,-128.63)   25.26                80
 11/26/2019   21:45:59   (  -0.06,-128.41) (   0.89,-124.06)  495.25                80
 11/28/2019   10:04:51   (   0.04,-128.42) (   0.25,-129.27)   96.68                80
 11/29/2019   09:48:36   (   0.05,-128.41) (  -0.77,-124.69)  423.22                80
 11/30/2019   22:07:35   (  -0.03,-128.34) (  -0.40,-129.93)  181.03                80