Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 3 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)
 03/26/2018   19:12:48   (  68.33,-109.59) 03/26/2018   19:13:44  (  68.33,-109.60)    0.38                56
 03/26/2018   20:03:29   ( -68.19,  57.90) 03/26/2018   20:03:15  ( -68.17,  57.84)    3.46                14
 03/26/2018   20:54:01   (  67.42,-133.83) 03/26/2018   20:52:52  (  67.50,-135.29)   62.61                69
 03/29/2018   11:29:44   (  68.32,   6.18) 03/29/2018   11:30:17  (  68.30,   6.23)    3.22                33
 03/29/2018   12:20:25   ( -68.18, 173.68) 03/29/2018   12:19:47  ( -68.20, 173.74)    3.16                38
 04/01/2018   02:56:05   ( -68.92, -46.14) 04/01/2018   02:57:15  ( -68.82, -44.90)   50.71                70
 04/01/2018   03:46:39   (  68.26, 122.03) 04/01/2018   03:46:50  (  68.27, 122.06)    1.16                11
 04/01/2018   04:37:20   ( -68.12, -70.47) 04/01/2018   04:36:21  ( -68.11, -70.49)    1.35                59
 04/03/2018   19:12:50   ( -68.32,  70.41) 04/03/2018   19:13:56  ( -68.34,  70.37)    2.98                66
 04/03/2018   20:03:34   (  68.21,-122.13) 04/03/2018   20:03:23  (  68.23,-122.12)    2.05                11
 04/03/2018   20:54:10   ( -67.79,  45.71) 04/03/2018   20:52:58  ( -67.85,  45.07)   27.87                72
 04/06/2018   11:29:45   ( -68.32,-173.81) 04/06/2018   11:30:28  ( -68.30,-173.81)    1.91                43
 04/06/2018   12:20:28   (  68.15,  -6.30) 04/06/2018   12:19:55  (  68.18,  -6.31)    3.15                33