Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2019   10:01:55   (  -0.01,-128.03) (   0.11,-128.54)   57.41                80
 12/15/2019   09:45:39   (  -0.00,-128.00) (  -0.91,-123.96)  460.44                80
 12/16/2019   22:04:39   (   0.02,-127.92) (  -0.25,-129.20)  145.52                80
 12/17/2019   21:48:22   (   0.01,-127.88) (   0.72,-124.61)  372.18                80
 12/19/2019   10:07:15   (  -0.03,-127.85) (   0.41,-129.82)  224.40                80
 12/20/2019   09:50:59   (  -0.02,-127.81) (  -0.61,-125.25)  293.07                80
 12/21/2019   22:09:57   (   0.04,-127.72) (  -0.61,-130.47)  313.51                80
 12/22/2019   21:53:42   (   0.03,-127.68) (   0.42,-125.89)  203.81                80
 12/24/2019   10:12:33   (  -0.04,-127.65) (   0.76,-131.09)  393.30                80
 12/25/2019   09:56:18   (  -0.03,-127.60) (  -0.26,-126.52)  123.64                80
 12/26/2019   22:15:17   (   0.04,-127.50) (  -0.90,-131.75)  483.86                80