Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 3 18.  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)
 03/18/2018   19:12:44   ( -68.33,  70.43) 03/18/2018   19:13:36  ( -68.31,  70.41)    2.02                52
 03/18/2018   20:03:28   (  68.19,-122.09) 03/18/2018   20:03:03  (  68.20,-122.08)    1.04                25
 03/18/2018   20:53:55   ( -67.31,  46.31) 03/18/2018   20:52:46  ( -67.37,  44.61)   73.48                69
 03/21/2018   11:29:40   ( -68.31,-173.78) 03/21/2018   11:30:11  ( -68.31,-173.74)    1.58                31
 03/21/2018   12:20:23   (  68.12,  -6.23) 03/21/2018   12:19:39  (  68.14,  -6.29)    3.10                44
 03/24/2018   02:56:02   (  68.86, 133.95) 03/24/2018   02:57:12  (  68.72, 134.98)   44.31                70
 03/24/2018   03:46:34   ( -68.23, -57.92) 03/24/2018   03:46:49  ( -68.23, -57.98)    2.77                15
 03/24/2018   04:37:18   (  68.11, 109.55) 03/24/2018   04:36:16  (  68.12, 109.53)    1.70                62
 03/26/2018   19:12:49   (  68.36,-109.63) 03/26/2018   19:13:59  (  68.34,-109.65)    2.16                70
 03/26/2018   20:03:31   ( -68.27,  57.80) 03/26/2018   20:03:29  ( -68.25,  57.87)    3.51                 2
 03/26/2018   20:54:11   (  67.93,-134.46) 03/26/2018   20:52:59  (  67.97,-134.81)   15.09                72
 03/29/2018   11:29:45   (  68.35,   6.15) 03/29/2018   11:30:42  (  68.34,   6.17)    1.31                57
 03/29/2018   12:20:26   ( -68.20, 173.66) 03/29/2018   12:20:13  ( -68.20, 173.63)    1.15                13
 03/29/2018   13:10:59   (  67.49, -18.15) 03/29/2018   13:09:49  (  67.58, -19.43)   55.33                70
 04/01/2018   03:46:41   (  68.34, 121.93) 04/01/2018   03:47:28  (  68.33, 121.96)    2.29                47