Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 11 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/18/2020   22:02:54   (   0.06,-127.52) (   0.07,-127.58)    7.08                 4
 11/21/2020   10:06:51   (  -0.05,-127.64) (   0.04,-128.19)   62.14                80
 11/22/2020   09:45:14   (  -0.07,-127.69) (  -1.00,-123.61)  464.60                80
 11/23/2020   22:09:32   (   0.04,-127.74) (  -0.19,-128.83)  123.97                80
 11/24/2020   21:47:55   (   0.06,-127.78) (   0.86,-124.25)  402.33                80
 11/26/2020   10:12:05   (  -0.03,-127.85) (   0.31,-129.44)  180.25                80
 11/27/2020   09:50:28   (  -0.05,-127.89) (  -0.73,-124.86)  346.18                80
 11/28/2020   22:14:45   (   0.01,-127.94) (  -0.44,-130.08)  242.43                80
 11/29/2020   21:53:09   (   0.03,-127.98) (   0.61,-125.50)  283.29                80
 12/01/2020   10:17:17   (   0.01,-128.04) (   0.62,-130.67)  301.01                80