Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 10 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/12/2019   09:57:10   (   0.24,-128.00) (  -0.04,-126.72)  145.61                80
 10/13/2019   22:16:11   (  -0.22,-127.99) (  -1.09,-131.97)  453.06                80
 10/14/2019   21:59:56   (  -0.23,-128.02) (  -0.08,-127.39)   71.91                80
 10/17/2019   09:59:52   (   0.23,-128.15) (   0.23,-128.02)   14.20                80
 10/19/2019   22:02:37   (  -0.21,-128.15) (  -0.34,-128.70)   62.59                80
 10/20/2019   21:46:22   (  -0.22,-128.17) (   0.67,-124.12)  461.13                80
 10/22/2019   10:05:14   (   0.19,-128.26) (   0.43,-129.34)  123.00                80
 10/23/2019   09:48:59   (   0.20,-128.28) (  -0.57,-124.76)  400.25                80
 10/24/2019   22:07:59   (  -0.18,-128.24) (  -0.60,-130.00)  201.47                80
 10/25/2019   21:51:44   (  -0.19,-128.26) (   0.41,-125.43)  321.91                80