Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 8 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/30/2021   21:56:00   (  -0.44,-128.23) (   0.40,-124.39)  437.73                80
 09/01/2021   10:17:29   (   0.44,-128.28) (   0.72,-129.57)  146.74                80
 09/02/2021   10:01:10   (   0.43,-128.27) (  -0.29,-124.97)  375.79                80
 09/03/2021   22:20:05   (  -0.43,-128.20) (  -0.87,-130.18)  225.43                80
 09/04/2021   22:03:47   (  -0.43,-128.19) (   0.13,-125.59)  296.79                80
 09/06/2021   10:22:35   (   0.42,-128.24) (   0.98,-130.77)  288.82                80
 09/07/2021   10:06:17   (   0.42,-128.23) (  -0.02,-126.17)  233.38                80
 09/08/2021   22:25:12   (  -0.41,-128.15) (  -1.14,-131.38)  368.30                80
 09/09/2021   22:08:54   (  -0.42,-128.14) (  -0.13,-126.79)  153.54                80
 09/11/2021   10:27:42   (   0.40,-128.17) (   1.24,-131.97)  433.31                80
 09/12/2021   10:11:23   (   0.41,-128.15) (   0.24,-127.38)   88.14                80