Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/05/2020   22:06:44   (   0.08,-127.91) (  -0.07,-128.46)   63.60                80
 09/06/2020   21:45:09   (   0.08,-127.94) (   1.01,-123.89)  462.02                80
 09/08/2020   10:06:39   (  -0.08,-128.04) (   0.13,-129.09)  118.85                80
 09/09/2020   09:50:22   (  -0.08,-128.07) (  -0.89,-124.51)  406.35                80
 09/10/2020   22:12:01   (   0.09,-128.06) (  -0.27,-129.74)  191.01                80
 09/11/2020   21:50:24   (   0.09,-128.08) (   0.75,-125.16)  333.55                80
 09/13/2020   10:11:54   (  -0.10,-128.17) (   0.38,-130.35)  248.89                80
 09/14/2020   09:55:38   (  -0.10,-128.19) (  -0.64,-125.77)  275.46                80
 09/15/2020   22:17:16   (   0.11,-128.17) (  -0.52,-131.00)  322.72                80
 09/16/2020   21:55:40   (   0.11,-128.18) (   0.51,-126.42)  201.30                80