Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 3 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)
 03/26/2020   21:52:09   (   0.29,-128.06) (   0.76,-126.08)  226.70                80
 03/28/2020   10:16:19   (  -0.27,-127.98) (   0.43,-131.27)  373.23                80
 03/29/2020   09:54:42   (  -0.28,-127.95) (  -0.55,-126.68)  144.60                80
 03/30/2020   22:19:01   (   0.26,-127.92) (  -0.64,-131.90)  453.98                80
 03/31/2020   21:57:25   (   0.27,-127.89) (   0.41,-127.33)   63.78                80
 04/03/2020   10:02:39   (  -0.25,-127.76) (  -0.19,-127.93)   20.04                80
 04/04/2020   09:41:04   (  -0.26,-127.72) (  -1.24,-123.36)  496.92                80
 04/05/2020   22:05:22   (   0.24,-127.68) (   0.06,-128.59)  103.01                80
 04/06/2020   21:43:45   (   0.25,-127.64) (   1.05,-124.00)  414.07                80
 04/08/2020   10:07:56   (  -0.23,-127.55) (   0.16,-129.19)  187.31                80