Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 4 14.  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)
 04/14/2018   11:29:49   (  68.33,   6.16) 04/14/2018   11:30:35  (  68.33,   6.19)    1.36                46
 04/14/2018   12:20:30   ( -68.18, 173.66) 04/14/2018   12:20:06  ( -68.17, 173.63)    2.25                24
 04/14/2018   13:10:56   (  67.09, -17.70) 04/14/2018   13:09:49  (  67.16, -19.87)   94.01                67
 04/17/2018   02:56:18   ( -69.36, -46.78) 04/17/2018   02:57:25  ( -69.27, -44.41)   93.60                67
 04/17/2018   03:46:44   (  68.28, 121.99) 04/17/2018   03:47:08  (  68.27, 121.99)    1.45                24
 04/17/2018   04:37:25   ( -68.13, -70.51) 04/17/2018   04:36:39  ( -68.11, -70.57)    3.47                46
 04/19/2018   19:12:59   ( -68.56,  70.08) 04/19/2018   19:14:11  ( -68.49,  70.48)   17.94                72
 04/19/2018   20:03:39   (  68.24,-122.19) 04/19/2018   20:03:41  (  68.21,-122.22)    3.22                 2
 04/19/2018   20:54:20   ( -68.09,  45.32) 04/19/2018   20:53:11  ( -68.11,  45.30)    3.07                69
 04/22/2018   11:29:49   ( -68.30,-173.81) 04/22/2018   11:30:45  ( -68.32,-173.86)    3.14                56
 04/22/2018   12:20:33   (  68.19,  -6.36) 04/22/2018   12:20:12  (  68.21,  -6.35)    1.38                21
 04/22/2018   13:11:03   ( -67.45, 161.88) 04/22/2018   13:09:53  ( -67.49, 160.46)   60.89                70
 04/25/2018   03:46:45   ( -68.31, -58.05) 04/25/2018   03:47:17  ( -68.32, -58.00)    2.10                32
 04/25/2018   04:37:28   (  68.15, 109.46) 04/25/2018   04:36:45  (  68.14, 109.44)    1.34                43
 04/27/2018   19:13:04   (  68.70,-110.10) 04/27/2018   19:14:15  (  68.63,-109.38)   29.99                71
 04/27/2018   20:03:40   ( -68.26,  57.78) 04/27/2018   20:03:50  ( -68.25,  57.79)    1.49                10
 04/27/2018   20:54:23   (  68.11,-134.71) 04/27/2018   20:53:17  (  68.13,-134.70)    2.83                66