Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 6 26.  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)
 06/28/2018   03:46:45   ( -68.37, -58.08) 06/28/2018   03:47:48  ( -68.37, -58.07)    0.31                63
 06/28/2018   04:37:29   (  68.23, 109.41) 06/28/2018   04:37:15  (  68.26, 109.43)    2.91                14
 06/28/2018   05:28:03   ( -67.73, -82.65) 06/28/2018   05:26:51  ( -67.82, -83.45)   34.85                72
 06/30/2018   20:03:39   ( -68.33,  57.75) 06/30/2018   20:04:18  ( -68.34,  57.76)    0.48                39
 06/30/2018   20:54:23   (  68.20,-134.77) 06/30/2018   20:53:45  (  68.21,-134.74)    2.46                38
 07/03/2018   11:30:00   (  68.91,   5.44) 07/03/2018   11:31:10  (  68.77,   6.54)   46.49                70
 07/03/2018   12:20:32   ( -68.29, 173.57) 07/03/2018   12:20:47  ( -68.29, 173.58)    0.79                15
 07/03/2018   13:11:16   (  68.16, -18.95) 07/03/2018   13:10:14  (  68.16, -18.92)    1.15                62
 07/06/2018   03:46:45   (  68.39, 121.91) 07/06/2018   03:47:46  (  68.38, 121.93)    1.70                61
 07/06/2018   04:37:26   ( -68.26, -70.60) 07/06/2018   04:37:17  ( -68.23, -70.61)    3.06                 9
 07/06/2018   05:28:02   (  67.69,  97.41) 07/06/2018   05:26:51  (  67.71,  96.43)   41.24                71
 07/08/2018   20:03:38   (  68.30,-122.21) 07/08/2018   20:04:16  (  68.31,-122.27)    2.61                38
 07/08/2018   20:54:20   ( -68.22,  45.22) 07/08/2018   20:53:46  ( -68.22,  45.25)    1.48                34