Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/02/2020   22:06:40   (   0.01,-128.06) (  -0.16,-128.73)   76.20                80
 06/03/2020   21:45:04   (   0.02,-128.04) (   0.90,-124.15)  443.30                80
 06/05/2020   10:09:13   (  -0.00,-128.03) (   0.28,-129.34)  149.57                80
 06/06/2020   09:47:37   (  -0.02,-128.00) (  -0.73,-124.76)  369.11                80
 06/07/2020   22:11:56   (  -0.00,-127.94) (  -0.43,-129.99)  233.48                80
 06/08/2020   21:50:20   (   0.01,-127.91) (   0.57,-125.41)  285.55                80
 06/10/2020   10:14:29   (   0.01,-127.90) (   0.61,-130.59)  307.25                80
 06/11/2020   09:52:53   (  -0.00,-127.87) (  -0.40,-126.01)  211.29                80
 06/12/2020   22:17:11   (  -0.02,-127.79) (  -0.82,-131.23)  392.16                80
 06/13/2020   21:56:43   (  -0.01,-127.77) (   0.25,-126.66)  126.74                12