Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 7 21.  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,-135.49) (   0.11,-135.10)   45.25                80
 07/23/2018   07:17:26   (   0.02,-135.50) (   0.71,-132.14)  381.60                80
 07/23/2018   19:41:22   (   0.01,-135.53) (   0.37,-137.30)  200.73                80
 07/25/2018   19:26:30   (   0.00,-135.52) (  -0.23,-134.34)  134.79                80
 07/26/2018   07:50:34   (  -0.04,-135.49) (  -0.87,-139.53)  458.12                80
 07/27/2018   19:14:19   (  -0.01,-135.52) (  -0.89,-131.39)  469.79                80
 07/28/2018   07:38:22   (  -0.03,-135.48) (  -0.27,-136.56)  123.21                80
 07/30/2018   07:23:31   (  -0.02,-135.47) (   0.39,-133.62)  211.16                80
 07/30/2018   19:47:26   (   0.06,-135.50) (   0.74,-138.76)  371.61                80
 08/01/2018   19:35:14   (   0.05,-135.48) (   0.14,-135.80)   37.82                80
 08/03/2018   19:20:23   (   0.04,-135.45) (  -0.53,-132.85)  295.45                80