Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/20/2020   10:12:21   (  -0.04,-128.28) (   0.37,-130.15)  213.06                80
 05/21/2020   09:50:46   (  -0.06,-128.27) (  -0.69,-125.58)  307.35                80
 05/22/2020   22:15:04   (   0.04,-128.25) (  -0.52,-130.80)  291.00                80
 05/23/2020   21:53:27   (   0.05,-128.24) (   0.48,-126.22)  229.41                80
 05/25/2020   10:17:38   (  -0.03,-128.23) (   0.66,-131.42)  362.89                80
 05/26/2020   09:56:01   (  -0.04,-128.21) (  -0.35,-126.83)  156.63                80
 05/27/2020   22:20:20   (   0.02,-128.16) (  -0.87,-132.05)  443.72                80
 05/28/2020   21:58:44   (   0.03,-128.14) (   0.19,-127.48)   75.98                80
 05/31/2020   10:03:57   (  -0.02,-128.11) (  -0.01,-128.08)    3.05                80