Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 6 27.  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   ( -68.39, -58.10) 06/28/2018   03:47:48  ( -68.37, -58.08)    2.38                63
 06/28/2018   04:37:29   (  68.24, 109.39) 06/28/2018   04:37:15  (  68.25, 109.43)    1.62                14
 06/28/2018   05:28:03   ( -67.75, -82.66) 06/28/2018   05:26:51  ( -67.81, -83.45)   33.93                72
 06/30/2018   20:03:39   ( -68.35,  57.73) 06/30/2018   20:04:18  ( -68.34,  57.76)    1.59                39
 06/30/2018   20:54:23   (  68.21,-134.78) 06/30/2018   20:53:45  (  68.22,-134.73)    2.52                38
 07/03/2018   11:30:01   (  68.92,   5.43) 07/03/2018   11:31:11  (  68.79,   6.57)   47.72                70
 07/03/2018   12:20:33   ( -68.31, 173.56) 07/03/2018   12:20:48  ( -68.31, 173.60)    1.85                15
 07/03/2018   13:11:17   (  68.17, -18.96) 07/03/2018   13:10:15  (  68.18, -18.90)    3.09                62
 07/06/2018   03:46:44   (  68.35, 121.96) 07/06/2018   03:47:47  (  68.37, 121.92)    2.69                63
 07/06/2018   04:37:26   ( -68.27, -70.62) 07/06/2018   04:37:17  ( -68.27, -70.56)    2.35                 9
 07/06/2018   05:28:02   (  67.71,  97.39) 07/06/2018   05:26:51  (  67.75,  96.48)   38.89                71
 07/08/2018   20:03:38   (  68.32,-122.22) 07/08/2018   20:04:17  (  68.32,-122.25)    1.63                39
 07/08/2018   20:54:20   ( -68.23,  45.20) 07/08/2018   20:53:47  ( -68.23,  45.27)    2.79                33
 07/11/2018   11:30:01   ( -69.10,-174.81) 07/11/2018   11:31:10  ( -68.96,-173.23)   64.58                69
 07/11/2018   12:20:32   (  68.29,  -6.41) 07/11/2018   12:20:47  (  68.28,  -6.43)    1.00                15
 07/11/2018   13:11:13   ( -68.15, 161.09) 07/11/2018   13:10:18  ( -68.13, 161.03)    2.81                55