Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 12 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/05/2021   10:25:25   (  -0.01,-128.07) (   0.63,-130.80)  311.50                80
 12/06/2021   10:09:42   (   0.01,-128.04) (  -0.36,-126.35)  192.30                80
 12/07/2021   22:29:34   (   0.02,-128.00) (  -0.85,-131.79)  431.90                80
 12/08/2021   22:13:51   (   0.01,-127.97) (   0.14,-127.34)   71.88                80
 12/11/2021   10:15:10   (  -0.02,-127.89) (   0.06,-128.29)   45.21                80
 12/12/2021   09:59:28   (  -0.01,-127.86) (  -0.93,-123.84)  458.47                80
 12/13/2021   22:19:19   (   0.03,-127.82) (  -0.28,-129.28)  165.86                80
 12/14/2021   22:03:37   (   0.02,-127.78) (   0.71,-124.83)  337.81                80
 12/16/2021   10:23:17   (  -0.04,-127.73) (   0.55,-130.21)  283.42                80
 12/17/2021   10:07:34   (  -0.03,-127.69) (  -0.44,-125.76)  219.73                80
 12/18/2021   22:27:26   (   0.04,-127.64) (  -0.75,-131.20)  405.85                80