Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 10 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)
 10/23/2020   21:54:29   (   0.14,-128.26) (   0.63,-126.00)  257.54                80
 10/25/2020   10:18:39   (  -0.13,-128.24) (   0.51,-131.19)  335.33                80
 10/26/2020   09:57:02   (  -0.14,-128.22) (  -0.52,-126.61)  184.75                80
 10/27/2020   22:21:20   (   0.12,-128.18) (  -0.71,-131.82)  414.73                80
 10/28/2020   21:59:43   (   0.13,-128.16) (   0.32,-127.24)  104.97                80
 10/30/2020   10:23:51   (  -0.11,-128.14) (   0.87,-132.42)  488.57                80
 10/31/2020   10:04:55   (  -0.12,-128.12) (  -0.16,-127.84)   31.27                80
 11/02/2020   22:07:37   (   0.11,-128.04) (   0.03,-128.48)   49.53                80
 11/03/2020   21:46:00   (   0.12,-128.01) (   1.07,-123.90)  469.27                80
 11/05/2020   10:10:09   (  -0.10,-127.97) (   0.14,-129.08)  125.98                80