Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/24/2020   10:06:09   (  -0.12,-128.38) (  -0.16,-128.29)   11.30                80
 09/26/2020   22:08:51   (   0.13,-128.37) (   0.00,-128.93)   64.09                80
 09/27/2020   21:47:14   (   0.13,-128.38) (   1.02,-124.35)  458.98                80
 09/29/2020   10:08:44   (  -0.13,-128.43) (   0.14,-129.54)  126.26                80
 09/30/2020   09:52:28   (  -0.13,-128.44) (  -0.94,-124.97)  397.07                80
 10/01/2020   22:14:06   (   0.13,-128.42) (  -0.24,-130.19)  201.31                80
 10/02/2020   21:52:30   (   0.13,-128.43) (   0.78,-125.61)  321.57                80
 10/04/2020   10:13:59   (  -0.13,-128.48) (   0.38,-130.80)  264.58                80
 10/05/2020   09:57:43   (  -0.13,-128.48) (  -0.64,-126.22)  258.17                80
 10/06/2020   22:19:21   (   0.13,-128.45) (  -0.54,-131.44)  340.87                80