Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 10 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/27/2020   22:21:20   (   0.12,-128.18) (  -0.67,-131.83)  415.09                80
 10/28/2020   21:59:43   (   0.13,-128.16) (   0.31,-127.23)  104.48                80
 10/30/2020   10:23:52   (  -0.11,-128.13) (   0.83,-132.43)  489.63                80
 10/31/2020   10:02:16   (  -0.12,-128.10) (  -0.21,-127.85)   30.00                80
 11/02/2020   22:07:36   (   0.11,-128.03) (   0.02,-128.48)   51.04                80
 11/03/2020   21:46:00   (   0.12,-128.00) (   1.06,-123.90)  467.56                80
 11/05/2020   10:10:08   (  -0.10,-127.95) (   0.14,-129.08)  128.20                80
 11/06/2020   09:48:32   (  -0.12,-127.92) (  -0.89,-124.50)  390.14                80
 11/07/2020   22:12:49   (   0.10,-127.86) (  -0.31,-129.71)  210.94                80
 11/08/2020   21:51:13   (   0.11,-127.82) (   0.73,-125.13)  306.83                80