Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/13/2021   10:14:20   (  -0.20,-127.93) (   0.20,-129.59)  189.78                80
 02/14/2021   09:52:43   (  -0.20,-128.03) (  -0.87,-125.01)  344.42                80
 02/15/2021   22:14:21   (   0.19,-128.22) (  -0.26,-130.24)  230.75                80
 02/16/2021   21:58:05   (   0.19,-128.32) (   0.81,-125.66)  303.67                80
 02/18/2021   10:19:33   (  -0.19,-128.47) (   0.33,-130.85)  270.46                80
 02/19/2021   09:57:56   (  -0.19,-128.57) (  -0.68,-126.26)  263.18                80
 02/20/2021   22:19:34   (   0.18,-128.74) (  -0.44,-131.49)  313.53                80
 02/21/2021   22:03:18   (   0.18,-128.84) (   0.62,-126.91)  220.12                80
 02/23/2021   10:24:46   (  -0.17,-128.98) (   0.51,-132.09)  354.67                80
 02/24/2021   10:03:08   (  -0.17,-129.07) (  -0.49,-127.50)  178.14                80
 02/25/2021   22:27:27   (   0.16,-129.22) (  -0.62,-132.73)  400.20                80