Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 5 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/21/2021   22:12:29   (  -0.07,-128.25) (  -0.26,-129.15)  102.06                80
 05/22/2021   21:56:11   (  -0.07,-128.28) (   0.78,-124.56)  423.41                80
 05/24/2021   10:17:39   (   0.07,-128.38) (   0.40,-129.74)  155.78                80
 05/25/2021   09:56:01   (   0.07,-128.39) (  -0.64,-125.15)  368.71                80
 05/26/2021   22:17:37   (  -0.07,-128.34) (  -0.53,-130.36)  231.13                80
 05/27/2021   22:01:20   (  -0.07,-128.35) (   0.51,-125.78)  293.42                80
 05/29/2021   10:22:47   (   0.07,-128.45) (   0.66,-130.95)  286.21                80
 05/30/2021   10:01:10   (   0.07,-128.45) (  -0.38,-126.36)  237.74                80
 05/31/2021   22:22:46   (  -0.07,-128.39) (  -0.78,-131.57)  363.49                80
 06/01/2021   22:06:29   (  -0.07,-128.40) (   0.26,-126.99)  160.94                80
 06/03/2021   10:27:56   (   0.07,-128.50) (   0.90,-132.16)  418.00                80