Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/17/2021   21:59:43   (  -0.09,-128.41) (   0.89,-124.06)  495.86                80
 11/19/2021   10:19:28   (   0.06,-128.40) (   0.31,-129.47)  123.27                80
 11/20/2021   10:03:52   (   0.07,-128.38) (  -0.69,-125.06)  379.83                80
 11/21/2021   22:23:56   (  -0.05,-128.36) (  -0.55,-130.54)  248.76                80
 11/22/2021   22:08:26   (  -0.06,-128.35) (   0.45,-126.14)  251.19                80
 11/24/2021   10:28:30   (   0.03,-128.32) (   0.76,-131.64)  377.52                80
 11/25/2021   10:13:05   (   0.04,-128.30) (  -0.17,-127.25)  119.19                80
 11/27/2021   22:15:30   (  -0.02,-128.25) (  -0.05,-128.48)   25.71                80
 11/28/2021   22:00:14   (  -0.04,-128.23) (   0.90,-124.13)  467.02                80
 11/30/2021   10:20:40   (   0.01,-128.19) (   0.35,-129.71)  172.68                80
 12/01/2021   10:05:30   (   0.02,-128.17) (  -0.58,-125.39)  316.65                80