Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/14/2021   10:15:39   (   0.08,-128.44) (  -0.05,-127.94)   56.51                80
 11/16/2021   22:15:36   (  -0.07,-128.42) (  -0.09,-128.56)   15.18                80
 11/19/2021   10:18:02   (   0.06,-128.40) (   0.25,-129.12)   82.53                80
 11/20/2021   10:01:44   (   0.08,-128.39) (  -0.78,-124.53)  440.30                80
 11/21/2021   22:20:39   (  -0.05,-128.37) (  -0.37,-129.73)  156.02                80
 11/22/2021   22:04:21   (  -0.06,-128.35) (   0.67,-125.14)  366.44                80
 11/24/2021   10:23:07   (   0.03,-128.33) (   0.48,-130.31)  225.37                80
 11/25/2021   10:06:49   (   0.05,-128.32) (  -0.56,-125.72)  296.65                80
 11/26/2021   22:25:43   (  -0.02,-128.28) (  -0.64,-130.91)  300.71                80
 11/27/2021   22:09:24   (  -0.03,-128.26) (   0.40,-126.32)  221.24                80