Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/17/2020   22:09:47   (   0.05,-128.29) (  -0.24,-129.54)  142.88                80
 05/18/2020   21:48:12   (   0.07,-128.29) (   0.82,-124.97)  378.38                80
 05/20/2020   10:12:21   (  -0.04,-128.28) (   0.38,-130.15)  213.06                80
 05/21/2020   09:50:45   (  -0.06,-128.27) (  -0.68,-125.58)  307.36                80
 05/22/2020   22:15:04   (   0.04,-128.25) (  -0.53,-130.80)  290.96                80
 05/23/2020   21:53:28   (   0.05,-128.24) (   0.53,-126.23)  229.49                80
 05/25/2020   10:17:38   (  -0.03,-128.23) (   0.67,-131.41)  362.72                80
 05/26/2020   09:56:01   (  -0.04,-128.21) (  -0.34,-126.83)  156.83                80
 05/27/2020   22:20:19   (   0.02,-128.16) (  -0.87,-132.05)  443.53                80
 05/28/2020   21:58:44   (   0.03,-128.15) (   0.19,-127.48)   76.21                80