Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/22/2019   21:49:51   (   0.20,-128.02) (   0.89,-124.96)  348.89                80
 07/24/2019   10:08:44   (  -0.22,-128.09) (   0.22,-130.18)  237.82                80
 07/25/2019   09:52:29   (  -0.21,-128.11) (  -0.77,-125.60)  286.17                80
 07/26/2019   22:11:29   (   0.24,-128.12) (  -0.38,-130.84)  310.89                80
 07/27/2019   21:55:15   (   0.23,-128.14) (   0.67,-126.28)  212.80                80
 07/29/2019   10:14:08   (  -0.26,-128.20) (   0.45,-131.50)  375.04                80
 07/30/2019   09:57:52   (  -0.25,-128.22) (  -0.54,-126.92)  147.92                80
 07/31/2019   22:16:53   (   0.27,-128.21) (  -0.61,-132.16)  450.90                80
 08/01/2019   22:00:37   (   0.27,-128.22) (   0.39,-127.58)   72.01                80
 08/04/2019   10:03:16   (  -0.28,-128.29) (  -0.32,-128.24)    7.01                80