Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 11 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/13/2020   21:57:40   (   0.09,-127.64) (   0.35,-126.34)  147.11                 5
 11/15/2020   10:20:33   (  -0.06,-127.56) (   0.86,-131.52)  452.10                80
 11/16/2020   09:58:57   (  -0.08,-127.52) (  -0.18,-126.94)   65.46                80
 11/18/2020   22:04:17   (   0.06,-127.42) (   0.03,-127.58)   17.36                80
 11/19/2020   21:42:41   (   0.08,-127.38) (   1.07,-123.00)  499.49                80
 11/21/2020   10:06:49   (  -0.05,-127.29) (   0.15,-128.17)  100.78                80
 11/22/2020   09:45:13   (  -0.07,-127.24) (  -0.89,-123.59)  416.22                80
 11/23/2020   22:09:29   (   0.04,-127.19) (  -0.35,-128.80)  183.63                80
 11/24/2020   21:47:53   (   0.06,-127.14) (   0.70,-124.22)  333.20                80
 11/26/2020   10:12:02   (  -0.03,-127.05) (   0.47,-129.40)  267.59                80
 11/27/2020   09:50:24   (  -0.05,-127.00) (  -0.51,-124.81)  249.19                80