Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 1 19.  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)
 01/21/2018   18:22:37   ( -69.27,  81.79) 01/21/2018   18:23:45  ( -69.17,  83.84)   81.95                68
 01/21/2018   19:13:05   (  68.29,-109.58) 01/21/2018   19:13:26  (  68.27,-109.62)    2.34                21
 01/21/2018   20:03:46   ( -68.16,  57.90) 01/21/2018   20:02:56  ( -68.17,  57.89)    1.78                50
 01/24/2018   10:39:15   ( -68.45,-161.32) 01/24/2018   10:40:27  ( -68.42,-161.21)    5.22                72
 01/24/2018   11:29:58   (  68.26,   6.22) 01/24/2018   11:29:55  (  68.25,   6.23)    2.02                 3
 01/24/2018   12:20:39   ( -68.13, 173.71) 01/24/2018   12:19:25  ( -68.15, 173.74)    2.03                74
 01/27/2018   02:56:06   ( -68.32, -45.37) 01/27/2018   02:56:57  ( -68.33, -45.43)    3.04                51
 01/27/2018   03:46:50   (  68.19, 122.10) 01/27/2018   03:46:24  (  68.21, 122.07)    2.66                26
 01/27/2018   04:37:16   ( -67.25, -69.43) 01/27/2018   04:36:08  ( -67.33, -71.31)   81.00                68
 01/29/2018   18:22:34   (  69.29, -98.23) 01/29/2018   18:23:41  (  69.22, -96.06)   85.56                67
 01/29/2018   19:12:59   ( -68.30,  70.43) 01/29/2018   19:13:26  ( -68.29,  70.40)    1.22                27
 01/29/2018   20:03:43   (  68.17,-122.10) 01/29/2018   20:02:53  (  68.17,-122.10)    0.40                50
 02/01/2018   10:39:11   (  68.47,  18.66) 02/01/2018   10:40:22  (  68.45,  18.85)    7.84                71
 02/01/2018   11:29:50   ( -68.23,-173.70) 02/01/2018   11:29:54  ( -68.24,-173.77)    3.43                 4
 02/01/2018   12:20:34   (  68.10,  -6.24) 02/01/2018   12:19:21  (  68.12,  -6.27)    2.31                73