Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 7 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/21/2018   07:29:38   (   0.02,-135.51) (   0.10,-135.10)   46.31                80
 07/23/2018   07:17:27   (   0.02,-135.51) (   0.75,-132.15)  383.09                80
 07/23/2018   19:41:22   (   0.01,-135.54) (   0.39,-137.29)  199.65                80
 07/25/2018   19:26:31   (   0.00,-135.54) (  -0.25,-134.34)  136.24                80
 07/26/2018   07:50:34   (  -0.04,-135.52) (  -0.92,-139.52)  456.07                80
 07/27/2018   19:14:20   (  -0.01,-135.54) (  -0.89,-131.39)  471.60                80
 07/28/2018   07:38:23   (  -0.03,-135.51) (  -0.28,-136.57)  120.81                80
 07/30/2018   07:23:32   (  -0.02,-135.50) (   0.36,-133.62)  213.93                80
 07/30/2018   19:47:28   (   0.06,-135.53) (   0.73,-138.78)  369.22                80
 08/01/2018   19:35:17   (   0.05,-135.51) (   0.09,-135.82)   35.13                80