Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 7 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/24/2021   22:00:54   (   0.12,-127.59) (   0.65,-125.26)  265.78                80
 07/26/2021   10:19:43   (  -0.14,-127.76) (   0.45,-130.45)  306.30                80
 07/27/2021   10:03:24   (  -0.13,-127.80) (  -0.55,-125.85)  220.93                80
 07/28/2021   22:22:21   (   0.15,-127.73) (  -0.60,-131.07)  379.98                80
 07/29/2021   22:06:02   (   0.14,-127.77) (   0.40,-126.47)  147.14                80
 07/31/2021   10:24:50   (  -0.16,-127.93) (   0.71,-131.66)  425.44                80
 08/01/2021   10:08:33   (  -0.15,-127.96) (  -0.35,-127.07)  101.35                80
 08/03/2021   22:11:11   (   0.17,-127.92) (   0.21,-127.69)   25.89                80
 08/06/2021   10:11:02   (  -0.18,-128.10) (  -0.15,-128.29)   22.19                80