Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 11 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/28/2020   22:14:44   (   0.01,-127.87) (  -0.50,-130.06)  249.85                80
 11/29/2020   21:53:08   (   0.03,-127.90) (   0.55,-125.48)  275.05                80
 12/01/2020   10:17:17   (   0.01,-127.94) (   0.62,-130.66)  310.88                80
 12/02/2020   09:55:40   (  -0.01,-127.96) (  -0.43,-126.08)  213.75                80
 12/03/2020   22:19:57   (  -0.02,-127.99) (  -0.79,-131.29)  376.66                80
 12/04/2020   21:58:21   (  -0.00,-128.01) (   0.32,-126.73)  147.33                80
 12/06/2020   10:22:30   (   0.03,-128.04) (   0.91,-131.90)  440.18                80
 12/07/2020   10:00:53   (   0.01,-128.06) (  -0.14,-127.32)   83.78                80
 12/09/2020   22:03:33   (  -0.03,-128.10) (  -0.02,-127.95)   16.80                80
 12/12/2020   10:08:46   (   0.05,-128.13) (   0.14,-128.56)   48.56                80