Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 4 13.  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   (  68.31,   6.18) 04/14/2018   11:30:36  (  68.29,   6.14)    3.21                47
 04/14/2018   12:20:30   ( -68.17, 173.68) 04/14/2018   12:20:06  ( -68.19, 173.65)    2.54                24
 04/14/2018   13:10:56   (  67.07, -17.68) 04/14/2018   13:09:50  (  67.12, -19.91)   96.75                66
 04/17/2018   02:56:19   ( -69.39, -46.82) 04/17/2018   02:57:25  ( -69.28, -44.39)   96.32                66
 04/17/2018   03:46:44   (  68.27, 122.01) 04/17/2018   03:47:08  (  68.28, 122.00)    1.43                24
 04/17/2018   04:37:26   ( -68.17, -70.55) 04/17/2018   04:36:38  ( -68.18, -70.49)    2.77                48
 04/19/2018   19:12:58   ( -68.55,  70.11) 04/19/2018   19:14:10  ( -68.49,  70.48)   16.36                72
 04/19/2018   20:03:38   (  68.22,-122.17) 04/19/2018   20:03:40  (  68.21,-122.22)    2.67                 2
 04/19/2018   20:54:20   ( -68.12,  45.28) 04/19/2018   20:53:10  ( -68.11,  45.30)    1.60                70
 04/22/2018   11:29:50   ( -68.34,-173.86) 04/22/2018   11:30:44  ( -68.36,-173.81)    2.90                54
 04/22/2018   12:20:33   (  68.18,  -6.34) 04/22/2018   12:20:12  (  68.19,  -6.37)    1.62                21
 04/22/2018   13:11:03   ( -67.43, 161.90) 04/22/2018   13:09:53  ( -67.47, 160.44)   62.48                70
 04/25/2018   03:46:45   ( -68.29, -58.03) 04/25/2018   03:47:17  ( -68.28, -58.04)    1.94                32
 04/25/2018   04:37:28   (  68.14, 109.48) 04/25/2018   04:36:44  (  68.16, 109.46)    2.57                44