Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/15/2020   22:17:16   (   0.11,-128.19) (  -0.50,-131.00)  319.93                80
 09/16/2020   21:55:40   (   0.11,-128.21) (   0.52,-126.42)  204.42                80
 09/18/2020   10:17:09   (  -0.11,-128.28) (   0.66,-131.60)  379.73                80
 09/19/2020   10:00:53   (  -0.11,-128.30) (  -0.37,-127.02)  144.62                80
 09/20/2020   22:22:31   (   0.11,-128.29) (  -0.80,-132.25)  452.13                80
 09/21/2020   22:00:55   (   0.11,-128.30) (   0.22,-127.67)   71.59                80
 09/24/2020   10:06:09   (  -0.12,-128.37) (  -0.14,-128.29)    9.41                80
 09/26/2020   22:08:50   (   0.13,-128.36) (  -0.00,-128.93)   64.95                80
 09/27/2020   21:47:14   (   0.13,-128.37) (   1.02,-124.35)  458.14                80