Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 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)
 07/13/2020   09:46:39   (   0.03,-128.37) (  -0.84,-124.42)  449.14                80
 07/14/2020   22:08:17   (  -0.03,-128.33) (  -0.34,-129.65)  150.22                80
 07/15/2020   21:52:02   (  -0.02,-128.34) (   0.73,-125.08)  372.72                80
 07/17/2020   10:13:32   (   0.02,-128.40) (   0.42,-130.27)  212.54                80
 07/18/2020   09:51:56   (   0.01,-128.41) (  -0.59,-125.69)  309.59                80
 07/19/2020   22:13:34   (   0.00,-128.36) (  -0.58,-130.92)  291.66                80
 07/20/2020   21:57:17   (   0.01,-128.36) (   0.43,-126.33)  230.31                80
 07/22/2020   10:18:49   (  -0.02,-128.41) (   0.66,-131.54)  355.97                80
 07/23/2020   09:57:12   (  -0.02,-128.41) (  -0.35,-126.96)  165.72                80
 07/24/2020   22:18:50   (   0.02,-128.35) (  -0.86,-132.17)  436.31                80
 07/25/2020   22:02:34   (   0.02,-128.35) (   0.21,-127.60)   85.45                80