Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 10 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/12/2020   22:02:58   (   0.14,-128.40) (   0.21,-128.10)   34.60                80
 10/15/2020   10:08:10   (  -0.14,-128.39) (  -0.05,-128.70)   35.39                80
 10/16/2020   09:49:14   (  -0.14,-128.38) (  -1.08,-124.12)  485.81                80
 10/17/2020   22:10:52   (   0.13,-128.35) (  -0.10,-129.34)  112.71                80
 10/18/2020   21:49:16   (   0.14,-128.34) (   0.93,-124.76)  407.81                80
 10/20/2020   10:13:24   (  -0.13,-128.32) (   0.26,-129.94)  184.72                80
 10/21/2020   09:51:47   (  -0.14,-128.31) (  -0.77,-125.36)  335.63                80
 10/22/2020   22:16:06   (   0.13,-128.27) (  -0.40,-130.58)  263.62                80
 10/23/2020   21:54:29   (   0.14,-128.25) (   0.63,-126.00)  256.23                80
 10/25/2020   10:18:39   (  -0.13,-128.23) (   0.51,-131.19)  337.23                80