Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 8 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/29/2021   22:17:39   (  -0.45,-128.23) (  -0.60,-128.98)   85.31                80
 08/30/2021   21:56:00   (  -0.44,-128.23) (   0.41,-124.39)  437.54                80
 09/01/2021   10:17:29   (   0.44,-128.28) (   0.71,-129.57)  146.70                80
 09/02/2021   10:01:10   (   0.43,-128.28) (  -0.29,-124.98)  375.84                80
 09/03/2021   22:20:05   (  -0.43,-128.20) (  -0.87,-130.18)  225.59                80
 09/04/2021   22:03:47   (  -0.43,-128.19) (   0.14,-125.59)  296.63                80
 09/06/2021   10:22:35   (   0.42,-128.24) (   0.98,-130.77)  288.75                80
 09/07/2021   10:06:17   (   0.42,-128.23) (  -0.03,-126.18)  233.46                80
 09/08/2021   22:25:12   (  -0.41,-128.15) (  -1.13,-131.38)  368.42                80
 09/09/2021   22:08:54   (  -0.42,-128.14) (  -0.12,-126.79)  153.42                80
 09/11/2021   10:27:42   (   0.40,-128.17) (   1.24,-131.97)  433.21                80