Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/17/2019   10:08:51   (  -0.05,-128.25) (   0.38,-130.14)  215.54                80
 06/18/2019   09:52:37   (  -0.04,-128.23) (  -0.67,-125.57)  303.17                80
 06/19/2019   22:11:38   (   0.07,-128.19) (  -0.50,-130.82)  299.07                80
 06/20/2019   21:55:23   (   0.06,-128.17) (   0.49,-126.24)  219.87                80
 06/22/2019   10:14:15   (  -0.08,-128.14) (   0.64,-131.45)  377.48                80
 06/23/2019   09:57:59   (  -0.07,-128.11) (  -0.34,-126.87)  140.95                80
 06/24/2019   22:17:01   (   0.09,-128.06) (  -0.81,-132.12)  462.40                80
 06/25/2019   22:00:45   (   0.08,-128.04) (   0.17,-127.54)   56.18                80
 06/28/2019   10:03:23   (  -0.09,-127.98) (  -0.07,-128.19)   23.68                80
 06/29/2019   09:44:28   (  -0.08,-127.94) (  -1.06,-123.61)  494.12                80
 06/30/2019   22:03:29   (   0.11,-127.88) (  -0.08,-128.86)  110.99                80