Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2019   09:51:00   (  -0.02,-128.03) (  -0.67,-125.25)  316.61                80
 12/21/2019   22:09:59   (   0.04,-128.04) (  -0.49,-130.49)  279.19                80
 12/22/2019   21:53:44   (   0.03,-128.07) (   0.53,-125.91)  245.70                80
 12/24/2019   10:12:35   (  -0.04,-128.14) (   0.65,-131.11)  338.89                80
 12/25/2019   09:56:20   (  -0.03,-128.17) (  -0.38,-126.54)  185.78                80
 12/26/2019   22:15:19   (   0.04,-128.17) (  -0.79,-131.77)  410.70                80
 12/27/2019   21:59:03   (   0.03,-128.20) (   0.23,-127.20)  113.60                80
 12/29/2019   10:17:56   (  -0.04,-128.27) (   0.88,-132.41)  471.82                80
 12/30/2019   10:01:40   (  -0.03,-128.29) (  -0.14,-127.84)   52.43                80
 01/01/2020   22:01:44   (   0.04,-128.32) (   0.00,-128.50)   20.27                80