Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/27/2021   22:16:04   (  -0.02,-128.26) (   0.06,-127.96)   34.73                80
 11/30/2021   10:17:27   (   0.01,-128.20) (   0.15,-128.92)   81.80                80
 12/01/2021   10:01:46   (   0.03,-128.17) (  -0.79,-124.47)  421.93                80
 12/02/2021   22:21:40   (  -0.00,-128.14) (  -0.42,-129.92)  202.88                80
 12/03/2021   22:05:59   (  -0.02,-128.11) (   0.56,-125.48)  300.25                80
 12/05/2021   10:25:45   (  -0.01,-128.06) (   0.64,-130.89)  322.35                80
 12/06/2021   10:10:05   (   0.01,-128.03) (  -0.37,-126.46)  179.93                80
 12/07/2021   22:30:01   (   0.02,-127.98) (  -0.85,-131.90)  447.12                80
 12/08/2021   22:14:21   (   0.01,-127.95) (   0.13,-127.47)   54.99                80
 12/11/2021   10:15:48   (  -0.02,-127.86) (   0.12,-128.44)   66.49                80