Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2019 1 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)
 01/14/2019   02:56:27   ( -68.33, -45.47) 01/14/2019   02:56:59  ( -68.34, -45.45)    0.79                32
 01/14/2019   03:47:10   (  68.16, 122.06) 01/14/2019   03:46:27  (  68.17, 122.00)    2.82                43
 01/16/2019   18:22:44   (  68.67, -97.46) 01/16/2019   18:23:55  (  68.60, -96.88)   24.84                71
 01/16/2019   19:13:20   ( -68.26,  70.40) 01/16/2019   19:13:29  ( -68.27,  70.35)    2.41                 9
 01/16/2019   20:04:04   (  68.14,-122.14) 01/16/2019   20:02:56  (  68.16,-122.13)    2.19                68
 01/19/2019   10:39:33   (  68.39,  18.69) 01/19/2019   10:40:28  (  68.37,  18.72)    2.37                55
 01/19/2019   11:30:14   ( -68.24,-173.80) 01/19/2019   11:29:58  ( -68.26,-173.78)    2.87                16
 01/19/2019   12:20:46   (  67.48,  -5.55) 01/19/2019   12:19:36  (  67.53,  -6.97)   60.83                70
 01/22/2019   02:56:26   (  68.32, 134.55) 01/22/2019   02:56:58  (  68.31, 134.52)    1.66                32
 01/22/2019   03:47:08   ( -68.22, -58.01) 01/22/2019   03:46:28  ( -68.20, -57.97)    2.94                40
 01/24/2019   18:22:43   ( -68.85,  82.31) 01/24/2019   18:23:53  ( -68.76,  83.31)   41.21                70
 01/24/2019   19:13:18   (  68.26,-109.60) 01/24/2019   19:13:27  (  68.25,-109.67)    2.85                 9
 01/24/2019   20:04:00   ( -68.16,  57.84) 01/24/2019   20:02:57  ( -68.15,  57.85)    1.09                63