Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 12 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)
 12/12/2021   09:59:27   (  -0.01,-127.85) (  -0.90,-123.83)  457.54                80
 12/13/2021   22:19:18   (   0.03,-127.80) (  -0.30,-129.27)  167.02                80
 12/14/2021   22:03:36   (   0.02,-127.77) (   0.69,-124.82)  336.37                80
 12/16/2021   10:23:17   (  -0.04,-127.71) (   0.50,-130.21)  285.32                80
 12/17/2021   10:07:34   (  -0.02,-127.67) (  -0.43,-125.75)  217.54                80
 12/18/2021   22:27:25   (   0.04,-127.61) (  -0.76,-131.19)  408.39                80
 12/19/2021   22:11:42   (   0.03,-127.57) (   0.24,-126.74)   94.25                80
 12/22/2021   10:13:00   (  -0.03,-127.45) (   0.03,-127.68)   26.14                80
 12/23/2021   09:57:18   (  -0.03,-127.40) (  -0.97,-123.23)  475.84                80
 12/24/2021   22:17:08   (   0.04,-127.33) (  -0.26,-128.66)  151.19                80
 12/25/2021   22:01:26   (   0.04,-127.29) (   0.74,-124.21)  350.78                80