Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 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)
 12/19/2019   10:07:15   (  -0.03,-127.99) (   0.36,-129.83)  208.54                80
 12/20/2019   09:51:00   (  -0.02,-128.03) (  -0.66,-125.25)  316.68                80
 12/21/2019   22:09:59   (   0.04,-128.04) (  -0.50,-130.49)  279.22                80
 12/22/2019   21:53:44   (   0.03,-128.07) (   0.52,-125.91)  245.67                80
 12/24/2019   10:12:36   (  -0.04,-128.15) (   0.60,-131.12)  338.76                80
 12/25/2019   09:56:19   (  -0.03,-128.17) (  -0.36,-126.54)  185.94                80
 12/26/2019   22:15:20   (   0.04,-128.18) (  -0.74,-131.78)  410.69                80
 12/27/2019   21:59:04   (   0.03,-128.20) (   0.28,-127.21)  113.66                80
 12/29/2019   10:17:56   (  -0.04,-128.27) (   0.89,-132.41)  471.63                80
 12/30/2019   10:01:40   (  -0.03,-128.30) (  -0.13,-127.83)   52.63                80
 01/01/2020   22:01:44   (   0.04,-128.32) (  -0.01,-128.49)   20.26                80