Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/18/2020   09:51:55   (   0.03,-128.41) (  -0.56,-125.68)  310.32                80
 07/19/2020   22:13:33   (  -0.02,-128.36) (  -0.61,-130.91)  290.28                80
 07/20/2020   21:57:18   (  -0.02,-128.37) (   0.46,-126.34)  231.87                80
 07/22/2020   10:18:48   (   0.02,-128.42) (   0.69,-131.53)  354.42                80
 07/23/2020   09:57:12   (   0.03,-128.41) (  -0.32,-126.95)  167.55                80
 07/24/2020   22:18:49   (  -0.03,-128.36) (  -0.90,-132.16)  433.90                80
 07/25/2020   22:02:33   (  -0.03,-128.36) (   0.17,-127.59)   87.93                80
 07/27/2020   10:24:04   (   0.03,-128.40) (   0.99,-132.79)  499.08                80
 07/28/2020   10:02:27   (   0.02,-128.40) (  -0.02,-128.20)   22.18                80
 07/30/2020   22:05:09   (   0.02,-128.32) (  -0.12,-128.85)   60.30                80
 07/31/2020   21:48:53   (   0.01,-128.31) (   0.90,-124.27)  460.76                80