Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/22/2020   09:44:30   (   0.01,-127.90) (  -0.90,-123.96)  449.62                80
 06/23/2020   22:08:48   (  -0.02,-127.89) (  -0.32,-129.17)  146.58                80
 06/24/2020   21:47:13   (  -0.01,-127.92) (   0.74,-124.60)  378.51                80
 06/26/2020   10:11:22   (   0.03,-128.02) (   0.43,-129.79)  202.47                80
 06/27/2020   09:49:46   (   0.02,-128.04) (  -0.63,-125.22)  322.16                80
 06/28/2020   22:14:05   (  -0.03,-128.03) (  -0.58,-130.44)  275.09                80
 06/29/2020   21:52:29   (  -0.02,-128.05) (   0.49,-125.87)  249.55                80
 07/01/2020   10:16:38   (   0.03,-128.15) (   0.69,-131.06)  332.09                80
 07/02/2020   09:55:03   (   0.02,-128.17) (  -0.37,-126.49)  191.84                80
 07/03/2020   22:19:21   (  -0.02,-128.14) (  -0.83,-131.71)  406.92                80
 07/04/2020   21:57:46   (  -0.02,-128.16) (   0.24,-127.14)  117.01                80