Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/21/2020   10:06:05   (   0.02,-127.86) (   0.17,-128.53)   75.44                80
 06/22/2020   09:44:30   (   0.01,-127.89) (  -0.89,-123.96)  449.51                80
 06/23/2020   22:08:48   (  -0.02,-127.89) (  -0.32,-129.17)  146.76                80
 06/24/2020   21:47:13   (  -0.01,-127.92) (   0.74,-124.60)  378.28                80
 06/26/2020   10:11:22   (   0.03,-128.01) (   0.44,-129.79)  202.80                80
 06/27/2020   09:49:46   (   0.02,-128.04) (  -0.63,-125.22)  321.77                80
 06/28/2020   22:14:05   (  -0.03,-128.03) (  -0.58,-130.44)  275.53                80
 06/29/2020   21:52:29   (  -0.02,-128.05) (   0.48,-125.87)  249.04                80
 07/01/2020   10:16:39   (   0.03,-128.14) (   0.70,-131.06)  332.70                80
 07/02/2020   09:55:03   (   0.02,-128.16) (  -0.36,-126.49)  191.17                80
 07/03/2020   22:19:21   (  -0.02,-128.13) (  -0.84,-131.71)  407.66                80
 07/04/2020   21:57:46   (  -0.02,-128.15) (   0.23,-127.14)  116.18                80