Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/28/2020   21:50:30   (   0.04,-128.30) (   0.64,-125.74)  292.34                80
 01/30/2020   10:12:00   (  -0.04,-128.26) (   0.53,-130.94)  304.27                80
 01/31/2020   09:55:43   (  -0.04,-128.24) (  -0.45,-126.35)  215.03                80
 02/01/2020   22:17:24   (   0.04,-128.21) (  -0.70,-131.59)  384.77                80
 02/02/2020   21:55:47   (   0.03,-128.19) (   0.27,-127.00)  134.00                80
 02/04/2020   10:17:17   (  -0.03,-128.13) (   0.90,-132.20)  463.98                80
 02/05/2020   10:01:02   (  -0.03,-128.10) (  -0.14,-127.63)   54.44                80
 02/07/2020   22:03:45   (  -0.01,-128.03) (  -0.09,-128.27)   27.92                80
 02/08/2020   21:42:09   (  -0.01,-127.99) (   0.94,-123.69)  489.72                80
 02/10/2020   10:03:40   (   0.01,-127.92) (   0.22,-128.89)  109.90                80