Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 2 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/17/2020   22:11:50   (   0.37,-128.41) (  -0.18,-130.92)  286.24                80
 02/18/2020   21:55:34   (   0.36,-128.42) (   0.80,-126.34)  236.82                80
 02/20/2020   10:14:24   (  -0.36,-128.41) (   0.36,-131.53)  356.33                80
 02/21/2020   09:58:09   (  -0.36,-128.42) (  -0.67,-126.96)  166.39                80
 02/22/2020   22:17:09   (   0.36,-128.45) (  -0.46,-132.20)  426.68                80
 02/23/2020   22:00:53   (   0.36,-128.46) (   0.52,-127.62)   96.09                80
 02/25/2020   10:22:23   (  -0.36,-128.46) (   0.64,-132.81)  497.08                80
 02/26/2020   10:00:47   (  -0.36,-128.46) (  -0.39,-128.24)   25.31                80
 02/28/2020   22:03:31   (   0.36,-128.49) (   0.25,-128.90)   46.19                80
 02/29/2020   21:47:16   (   0.35,-128.50) (   1.30,-124.32)  475.88                80