Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 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)
 02/18/2021   10:19:31   (  -0.19,-127.96) (   0.43,-130.82)  325.78                80
 02/19/2021   09:57:54   (  -0.19,-127.99) (  -0.58,-126.23)  199.95                80
 02/20/2021   22:19:32   (   0.18,-128.07) (  -0.55,-131.46)  386.14                80
 02/21/2021   22:03:15   (   0.18,-128.10) (   0.46,-126.87)  139.65                80
 02/23/2021   10:24:42   (  -0.17,-128.10) (   0.74,-132.04)  449.80                80
 02/24/2021   10:03:06   (  -0.17,-128.12) (  -0.33,-127.47)   75.10                80
 02/26/2021   22:08:25   (   0.16,-128.21) (   0.16,-128.09)   12.77                80
 03/01/2021   10:10:57   (  -0.16,-128.23) (  -0.08,-128.70)   52.95                80
 03/02/2021   09:49:20   (  -0.16,-128.24) (  -1.09,-124.11)  471.31                80