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   21:56:01   (  -0.44,-128.23) (   0.42,-124.39)  437.85                80
 09/01/2021   10:17:28   (   0.44,-128.28) (   0.76,-129.56)  146.78                80
 09/02/2021   10:01:10   (   0.44,-128.27) (  -0.31,-124.98)  375.77                80
 09/03/2021   22:20:06   (  -0.43,-128.20) (  -0.85,-130.19)  225.33                80
 09/04/2021   22:03:47   (  -0.43,-128.20) (   0.15,-125.59)  296.88                80
 09/06/2021   10:22:36   (   0.42,-128.24) (   0.97,-130.77)  288.87                80
 09/07/2021   10:06:17   (   0.42,-128.22) (  -0.04,-126.18)  233.33                80
 09/08/2021   22:25:12   (  -0.41,-128.15) (  -1.12,-131.39)  368.22                80
 09/09/2021   22:08:54   (  -0.42,-128.14) (  -0.12,-126.79)  153.60                80
 09/11/2021   10:27:41   (   0.40,-128.17) (   1.29,-131.96)  433.39                80
 09/12/2021   10:11:24   (   0.41,-128.15) (   0.22,-127.38)   88.07                80