Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 9 8.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2018   19:13:28   ( -68.46,  70.22) 09/10/2018   19:14:36  ( -68.45,  70.26)    2.13                68
 09/10/2018   20:04:11   (  68.29,-122.25) 09/10/2018   20:04:04  (  68.28,-122.29)    1.75                 7
 09/10/2018   20:54:49   ( -67.98,  45.46) 09/10/2018   20:53:36  ( -68.06,  45.07)   18.23                73
 09/13/2018   11:30:23   ( -68.37,-173.90) 09/13/2018   11:31:05  ( -68.39,-173.93)    2.21                42
 09/13/2018   12:21:07   (  68.26,  -6.44) 09/13/2018   12:20:32  (  68.28,  -6.42)    2.51                35
 09/16/2018   02:56:47   (  68.98, 133.74) 09/16/2018   02:57:57  (  68.82, 134.85)   47.52                70
 09/16/2018   03:47:19   ( -68.34, -58.09) 09/16/2018   03:47:34  ( -68.33, -58.12)    2.15                15
 09/16/2018   04:38:03   (  68.23, 109.36) 09/16/2018   04:37:01  (  68.21, 109.38)    2.03                62
 09/18/2018   19:13:32   (  68.41,-109.73) 09/18/2018   19:14:31  (  68.42,-109.76)    1.45                59
 09/18/2018   20:04:14   ( -68.31,  57.71) 09/18/2018   20:04:01  ( -68.32,  57.74)    1.24                13
 09/18/2018   20:54:47   (  67.61,-134.10) 09/18/2018   20:53:37  (  67.69,-135.34)   53.34                70
 09/21/2018   11:30:28   (  68.39,   6.07) 09/21/2018   11:30:59  (  68.40,   6.10)    1.89                31
 09/21/2018   12:21:09   ( -68.23, 173.59) 09/21/2018   12:20:30  ( -68.24, 173.54)    2.33                39