Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 1 27.  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)
 01/29/2018   18:22:35   (  69.36, -98.33) 01/29/2018   18:23:41  (  69.27, -96.00)   91.88                66
 01/29/2018   19:12:59   ( -68.32,  70.40) 01/29/2018   19:13:26  ( -68.34,  70.45)    2.58                27
 01/29/2018   20:03:43   (  68.19,-122.13) 01/29/2018   20:02:54  (  68.17,-122.11)    3.01                49
 02/01/2018   10:39:13   (  68.54,  18.57) 02/01/2018   10:40:24  (  68.50,  18.89)   14.24                71
 02/01/2018   11:29:51   ( -68.25,-173.74) 02/01/2018   11:29:56  ( -68.28,-173.74)    3.33                 5
 02/01/2018   12:20:35   (  68.12,  -6.26) 02/01/2018   12:19:24  (  68.11,  -6.30)    1.99                71
 02/04/2018   02:56:01   (  68.32, 134.64) 02/04/2018   02:56:55  (  68.33, 134.57)    3.37                54
 02/04/2018   03:46:43   ( -68.24, -57.94) 02/04/2018   03:46:25  ( -68.24, -57.91)    1.18                18
 02/04/2018   04:37:13   (  67.35, 110.46) 02/04/2018   04:36:05  (  67.39, 108.76)   72.82                68
 02/06/2018   19:12:54   (  68.31,-109.57) 02/06/2018   19:13:25  (  68.29,-109.60)    2.11                31
 02/06/2018   20:03:35   ( -68.17,  57.92) 02/06/2018   20:02:55  ( -68.20,  57.92)    2.50                40
 02/09/2018   10:39:11   ( -68.85,-161.82) 02/09/2018   10:40:22  ( -68.71,-160.86)   41.72                71
 02/09/2018   11:29:46   (  68.25,   6.29) 02/09/2018   11:29:55  (  68.26,   6.23)    2.38                 9
 02/09/2018   12:20:28   ( -68.16, 173.71) 02/09/2018   12:19:25  ( -68.16, 173.75)    1.86                63