Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 8 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)
 08/25/2020   22:12:29   (   0.05,-127.64) (  -0.56,-130.53)  328.20                80
 08/26/2020   21:56:13   (   0.05,-127.60) (   0.45,-125.95)  189.30                80
 08/28/2020   10:15:02   (  -0.06,-127.58) (   0.76,-131.13)  405.35                80
 08/29/2020   09:58:46   (  -0.06,-127.53) (  -0.26,-126.55)  111.85                80
 08/30/2020   22:17:44   (   0.07,-127.42) (  -0.89,-131.78)  496.24                80
 08/31/2020   22:01:27   (   0.07,-127.37) (   0.13,-127.19)   21.06                80
 09/03/2020   10:01:20   (  -0.08,-127.30) (   0.06,-127.79)   56.59                80
 09/04/2020   09:45:04   (  -0.07,-127.26) (  -0.96,-123.21)  460.56                80
 09/05/2020   22:04:02   (   0.08,-127.14) (  -0.18,-128.44)  147.87                80
 09/06/2020   21:47:45   (   0.08,-127.09) (   0.78,-123.85)  369.03                80