Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 4 25.  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)
 04/25/2018   04:37:29   (  68.19, 109.41) 04/25/2018   04:36:44  (  68.18, 109.48)    2.87                45
 04/27/2018   19:13:03   (  68.69,-110.09) 04/27/2018   19:14:14  (  68.59,-109.44)   28.54                71
 04/27/2018   20:03:39   ( -68.27,  57.77) 04/27/2018   20:03:48  ( -68.26,  57.79)    1.48                 9
 04/27/2018   20:54:22   (  68.10,-134.70) 04/27/2018   20:53:16  (  68.10,-134.75)    2.19                66
 04/30/2018   11:29:52   (  68.33,   6.15) 04/30/2018   11:30:50  (  68.34,   6.13)    1.38                58
 04/30/2018   12:20:34   ( -68.23, 173.59) 04/30/2018   12:20:20  ( -68.23, 173.63)    1.59                14
 04/30/2018   13:11:07   (  67.52, -18.22) 04/30/2018   13:09:57  (  67.56, -19.50)   54.38                70
 05/03/2018   03:46:47   (  68.30, 121.96) 05/03/2018   03:47:22  (  68.31, 121.96)    1.24                35
 05/03/2018   04:37:29   ( -68.20, -70.59) 05/03/2018   04:36:52  ( -68.20, -70.53)    2.54                37
 05/05/2018   19:13:09   ( -68.96,  69.54) 05/05/2018   19:14:19  ( -68.83,  70.83)   53.38                70
 05/05/2018   20:03:42   (  68.27,-122.23) 05/05/2018   20:03:54  (  68.28,-122.21)    1.27                12
 05/05/2018   20:54:23   ( -68.11,  45.29) 05/05/2018   20:53:25  ( -68.12,  45.23)    2.42                58
 05/08/2018   11:29:52   ( -68.34,-173.87) 05/08/2018   11:30:58  ( -68.36,-173.89)    1.91                66
 05/08/2018   12:20:36   (  68.24,  -6.42) 05/08/2018   12:20:25  (  68.24,  -6.38)    1.60                11
 05/08/2018   13:11:12   ( -67.81, 161.43) 05/08/2018   13:10:00  ( -67.86, 160.80)   27.02                72