Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/23/2020   22:08:49   (  -0.02,-127.89) (  -0.28,-129.18)  146.48                80
 06/24/2020   21:47:12   (  -0.02,-127.92) (   0.73,-124.60)  378.70                80
 06/26/2020   10:11:21   (   0.03,-128.02) (   0.45,-129.79)  202.17                80
 06/27/2020   09:49:46   (   0.02,-128.05) (  -0.62,-125.22)  322.52                80
 06/28/2020   22:14:04   (  -0.03,-128.03) (  -0.59,-130.44)  274.66                80
 06/29/2020   21:52:29   (  -0.03,-128.06) (   0.48,-125.87)  250.04                80
 07/01/2020   10:16:38   (   0.03,-128.15) (   0.70,-131.05)  331.48                80
 07/02/2020   09:55:03   (   0.02,-128.17) (  -0.36,-126.48)  192.52                80
 07/03/2020   22:19:21   (  -0.03,-128.14) (  -0.83,-131.71)  406.18                80
 07/04/2020   21:57:46   (  -0.02,-128.16) (   0.24,-127.14)  117.80                80
 07/06/2020   10:21:55   (   0.02,-128.25) (   0.95,-132.32)  464.42                80