Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 4 12.  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   11:30:35  (  68.34,   6.20)    3.29                46
 04/14/2018   12:20:30   ( -68.17, 173.68) 04/14/2018   12:20:06  ( -68.18, 173.65)    2.45                24
 04/14/2018   13:10:56   (  67.07, -17.68) 04/14/2018   13:09:50  (  67.12, -19.92)   96.83                66
 04/17/2018   02:56:19   ( -69.39, -46.83) 04/17/2018   02:57:25  ( -69.27, -44.40)   96.20                66
 04/17/2018   03:46:44   (  68.27, 122.01) 04/17/2018   03:47:08  (  68.27, 121.99)    0.87                24
 04/17/2018   04:37:26   ( -68.17, -70.55) 04/17/2018   04:36:38  ( -68.17, -70.49)    2.44                48
 04/19/2018   19:12:58   ( -68.55,  70.10) 04/19/2018   19:14:10  ( -68.48,  70.47)   16.60                72
 04/19/2018   20:03:38   (  68.23,-122.17) 04/19/2018   20:03:39  (  68.26,-122.16)    3.47                 1
 04/19/2018   20:54:20   ( -68.12,  45.27) 04/19/2018   20:53:10  ( -68.10,  45.29)    2.56                70
 04/22/2018   11:29:50   ( -68.34,-173.86) 04/22/2018   11:30:44  ( -68.35,-173.83)    1.61                54
 04/22/2018   12:20:33   (  68.19,  -6.35) 04/22/2018   12:20:12  (  68.18,  -6.39)    1.87                21
 04/22/2018   13:11:02   ( -67.38, 161.96) 04/22/2018   13:09:53  ( -67.46, 160.43)   65.99                69
 04/25/2018   03:46:45   ( -68.30, -58.04) 04/25/2018   03:47:16  ( -68.32, -57.99)    2.59                31
 04/25/2018   04:37:28   (  68.15, 109.47) 04/25/2018   04:36:44  (  68.14, 109.45)    1.01                44