Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 1 17.  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)
 01/19/2018   02:56:13   (  68.32, 134.60) 01/19/2018   02:56:57  (  68.34, 134.58)    2.48                44
 01/19/2018   03:46:55   ( -68.24, -57.98) 01/19/2018   03:46:27  ( -68.24, -57.91)    2.69                28
 01/21/2018   18:22:37   ( -69.27,  81.78) 01/21/2018   18:23:45  ( -69.16,  83.84)   82.12                68
 01/21/2018   19:13:05   (  68.30,-109.59) 01/21/2018   19:13:26  (  68.27,-109.62)    2.96                21
 01/21/2018   20:03:46   ( -68.16,  57.90) 01/21/2018   20:02:56  ( -68.17,  57.89)    1.14                50
 01/24/2018   10:39:15   ( -68.45,-161.32) 01/24/2018   10:40:27  ( -68.42,-161.20)    5.47                72
 01/24/2018   11:29:58   (  68.27,   6.21) 01/24/2018   11:29:55  (  68.25,   6.23)    2.46                 3
 01/24/2018   12:20:39   ( -68.13, 173.71) 01/24/2018   12:19:25  ( -68.15, 173.74)    2.23                74
 01/27/2018   02:56:06   ( -68.32, -45.38) 01/27/2018   02:56:57  ( -68.34, -45.42)    3.31                51
 01/27/2018   03:46:50   (  68.20, 122.09) 01/27/2018   03:46:24  (  68.22, 122.08)    3.07                26
 01/27/2018   04:37:16   ( -67.25, -69.44) 01/27/2018   04:36:08  ( -67.34, -71.30)   80.53                68
 01/29/2018   18:22:35   (  69.35, -98.31) 01/29/2018   18:23:41  (  69.25, -96.04)   90.09                66
 01/29/2018   19:12:59   ( -68.30,  70.43) 01/29/2018   19:13:26  ( -68.31,  70.42)    1.58                27
 01/29/2018   20:03:43   (  68.18,-122.11) 01/29/2018   20:02:53  (  68.19,-122.07)    2.19                50