Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/10/2020   10:14:29   (   0.01,-127.88) (   0.64,-130.59)  308.82                80
 06/11/2020   09:52:53   (   0.00,-127.85) (  -0.43,-126.01)  209.38                80
 06/12/2020   22:14:31   (  -0.02,-127.78) (  -0.80,-131.23)  393.64                80
 06/13/2020   21:58:15   (  -0.01,-127.75) (   0.21,-126.65)  125.02                80
 06/15/2020   10:19:44   (   0.03,-127.73) (   0.97,-131.84)  468.88                80
 06/16/2020   09:58:09   (   0.02,-127.69) (  -0.09,-127.26)   48.95                80
 06/18/2020   22:00:52   (  -0.02,-127.58) (  -0.07,-127.91)   37.92                80
 06/19/2020   21:44:35   (  -0.01,-127.54) (   0.94,-123.33)  479.89                80
 06/21/2020   10:06:04   (   0.02,-127.50) (   0.25,-128.52)  115.34                80
 06/22/2020   09:44:28   (   0.01,-127.46) (  -0.76,-123.93)  401.44                80