Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/19/2020   22:13:33   (  -0.03,-128.36) (  -0.62,-130.90)  289.95                80
 07/20/2020   21:57:18   (  -0.03,-128.37) (   0.45,-126.33)  232.30                80
 07/22/2020   10:18:47   (   0.03,-128.42) (   0.76,-131.52)  353.95                80
 07/23/2020   09:57:11   (   0.03,-128.42) (  -0.31,-126.95)  167.99                80
 07/24/2020   22:18:49   (  -0.03,-128.36) (  -0.91,-132.16)  433.36                80
 07/25/2020   22:02:33   (  -0.03,-128.36) (   0.16,-127.59)   88.52                80
 07/27/2020   10:24:04   (   0.03,-128.41) (   0.99,-132.79)  498.42                80
 07/28/2020   10:02:27   (   0.03,-128.40) (  -0.02,-128.20)   22.91                80
 07/30/2020   22:05:09   (   0.02,-128.33) (  -0.12,-128.85)   59.50                80
 07/31/2020   21:48:52   (   0.02,-128.32) (   0.90,-124.27)  461.51                80