Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/25/2020   10:06:41   (  -0.04,-128.37) (   0.25,-129.66)  147.27                80
 01/26/2020   09:50:25   (  -0.04,-128.35) (  -0.79,-125.08)  372.43                80
 01/27/2020   22:12:05   (   0.04,-128.32) (  -0.42,-130.31)  226.88                80
 01/28/2020   21:50:29   (   0.04,-128.30) (   0.61,-125.74)  292.51                80
 01/30/2020   10:11:59   (  -0.04,-128.27) (   0.56,-130.93)  304.00                80
 01/31/2020   09:55:44   (  -0.04,-128.25) (  -0.47,-126.36)  215.35                80
 02/01/2020   22:17:23   (   0.04,-128.22) (  -0.74,-131.58)  384.24                80
 02/02/2020   21:55:48   (   0.03,-128.19) (   0.29,-127.01)  134.58                80
 02/04/2020   10:17:18   (  -0.03,-128.14) (   0.88,-132.21)  463.33                80
 02/05/2020   10:01:03   (  -0.03,-128.11) (  -0.16,-127.63)   55.23                80
 02/07/2020   22:03:45   (  -0.01,-128.04) (  -0.08,-128.27)   26.78                80