Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 2 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/07/2020   22:03:46   (   0.02,-128.03) (  -0.03,-128.28)   27.54                80
 02/08/2020   21:42:09   (  -0.00,-128.00) (   0.95,-123.69)  490.83                80
 02/10/2020   10:03:40   (   0.00,-127.93) (   0.20,-128.89)  108.35                80
 02/11/2020   09:47:23   (  -0.00,-127.90) (  -0.78,-124.30)  409.35                80
 02/12/2020   22:09:03   (   0.00,-127.85) (  -0.37,-129.54)  192.17                80
 02/13/2020   21:47:28   (   0.01,-127.82) (   0.67,-124.97)  325.30                80
 02/15/2020   10:08:57   (  -0.00,-127.74) (   0.53,-130.15)  274.65                80
 02/16/2020   09:52:41   (   0.00,-127.70) (  -0.45,-125.57)  242.74                80
 02/17/2020   22:14:21   (  -0.01,-127.65) (  -0.69,-130.81)  359.27                80
 02/18/2020   21:52:45   (  -0.01,-127.61) (   0.30,-126.22)  157.66                80