Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 9 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)
 09/18/2018   19:13:33   (  68.42,-109.74) 09/18/2018   19:14:32  (  68.43,-109.76)    1.45                59
 09/18/2018   20:04:15   ( -68.33,  57.70) 09/18/2018   20:04:02  ( -68.31,  57.74)    2.32                13
 09/18/2018   20:54:47   (  67.61,-134.10) 09/18/2018   20:53:37  (  67.70,-135.33)   53.15                70
 09/21/2018   11:30:28   (  68.39,   6.06) 09/21/2018   11:31:00  (  68.37,   6.05)    2.23                32
 09/21/2018   12:21:09   ( -68.25, 173.57) 09/21/2018   12:20:30  ( -68.26, 173.56)    1.71                39
 09/24/2018   02:56:46   ( -68.81, -46.03) 09/24/2018   02:57:57  ( -68.72, -45.29)   31.58                71
 09/24/2018   03:47:23   (  68.32, 121.93) 09/24/2018   03:47:29  (  68.33, 121.88)    2.34                 6
 09/24/2018   04:38:05   ( -68.23, -70.63) 09/24/2018   04:36:59  ( -68.22, -70.61)    0.97                66
 09/26/2018   19:13:35   ( -68.42,  70.26) 09/26/2018   19:14:31  ( -68.41,  70.21)    2.34                56
 09/26/2018   20:04:19   (  68.30,-122.28) 09/26/2018   20:03:58  (  68.29,-122.28)    0.86                21
 09/26/2018   20:54:48   ( -67.51,  46.03) 09/26/2018   20:53:39  ( -67.58,  44.52)   64.61                69
 09/29/2018   10:40:08   (  69.51,  17.21) 09/29/2018   10:41:14  (  69.37,  19.68)   97.39                66
 09/29/2018   11:30:31   ( -68.40,-173.94) 09/29/2018   11:31:00  ( -68.38,-173.94)    1.80                29
 09/29/2018   12:21:14   (  68.28,  -6.49) 09/29/2018   12:20:26  (  68.26,  -6.44)    2.93                48
 10/02/2018   02:56:46   (  68.59, 134.26) 10/02/2018   02:57:56  (  68.58, 134.54)   11.42                70
 10/02/2018   03:47:25   ( -68.33, -58.09) 10/02/2018   03:47:29  ( -68.31, -58.15)    3.53                 4
 10/02/2018   04:38:09   (  68.22, 109.37) 10/02/2018   04:36:56  (  68.19, 109.35)    3.20                73