Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 9 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)
 09/18/2018   19:13:32   (  68.41,-109.73) 09/18/2018   19:14:31  (  68.43,-109.76)    2.61                59
 09/18/2018   20:04:14   ( -68.32,  57.71) 09/18/2018   20:04:01  ( -68.32,  57.74)    1.46                13
 09/18/2018   20:54:47   (  67.60,-134.09) 09/18/2018   20:53:37  (  67.70,-135.33)   53.65                70
 09/21/2018   11:30:28   (  68.38,   6.07) 09/21/2018   11:31:00  (  68.36,   6.04)    3.05                32
 09/21/2018   12:21:09   ( -68.24, 173.58) 09/21/2018   12:20:30  ( -68.25, 173.55)    1.96                39
 09/24/2018   02:56:46   ( -68.80, -46.02) 09/24/2018   02:57:57  ( -68.68, -45.33)   30.79                71
 09/24/2018   03:47:24   (  68.36, 121.87) 09/24/2018   03:47:28  (  68.34, 121.90)    2.50                 4
 09/24/2018   04:38:05   ( -68.22, -70.62) 09/24/2018   04:36:58  ( -68.24, -70.59)    3.01                67
 09/26/2018   19:13:36   ( -68.46,  70.20) 09/26/2018   19:14:29  ( -68.45,  70.26)    2.91                53
 09/26/2018   20:04:19   (  68.29,-122.27) 09/26/2018   20:03:57  (  68.27,-122.30)    2.78                22
 09/26/2018   20:54:48   ( -67.50,  46.04) 09/26/2018   20:53:38  ( -67.56,  44.50)   65.63                70
 09/29/2018   10:40:05   (  69.40,  17.38) 09/29/2018   10:41:12  (  69.31,  19.60)   87.52                67
 09/29/2018   11:30:30   ( -68.39,-173.93) 09/29/2018   11:30:57  ( -68.37,-173.95)    2.10                27
 09/29/2018   12:21:14   (  68.28,  -6.48) 09/29/2018   12:20:24  (  68.25,  -6.45)    3.09                50