Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 8 31.  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)
 08/31/2018   04:37:55   (  68.25, 109.35) 08/31/2018   04:37:07  (  68.24, 109.41)    2.99                48
 09/02/2018   19:13:26   (  68.53,-109.87) 09/02/2018   19:14:36  (  68.53,-109.64)    9.51                70
 09/02/2018   20:04:06   ( -68.33,  57.71) 09/02/2018   20:04:08  ( -68.30,  57.72)    3.36                 2
 09/02/2018   20:54:49   (  68.16,-134.76) 09/02/2018   20:53:36  (  68.14,-134.83)    3.45                73
 09/05/2018   11:30:20   (  68.39,   6.08) 09/05/2018   11:31:07  (  68.37,   6.05)    2.22                47
 09/05/2018   12:21:01   ( -68.23, 173.60) 09/05/2018   12:20:37  ( -68.26, 173.55)    3.30                24
 09/05/2018   13:11:27   (  67.15, -17.76) 09/05/2018   13:10:21  (  67.20, -20.02)   97.30                66
 09/08/2018   02:56:48   ( -69.31, -46.71) 09/08/2018   02:57:55  ( -69.21, -44.66)   81.64                67
 09/08/2018   03:47:16   (  68.35, 121.90) 09/08/2018   03:47:36  (  68.33, 121.88)    2.82                20
 09/08/2018   04:37:57   ( -68.19, -70.58) 09/08/2018   04:37:06  ( -68.21, -70.62)    2.70                51
 09/10/2018   19:13:28   ( -68.42,  70.26) 09/10/2018   19:14:37  ( -68.45,  70.26)    2.76                69
 09/10/2018   20:04:12   (  68.31,-122.29) 09/10/2018   20:04:04  (  68.34,-122.23)    3.37                 8
 09/10/2018   20:54:50   ( -68.00,  45.43) 09/10/2018   20:53:37  ( -68.06,  45.08)   16.49                73
 09/13/2018   11:30:23   ( -68.39,-173.92) 09/13/2018   11:31:05  ( -68.40,-173.91)    1.86                42
 09/13/2018   12:21:06   (  68.23,  -6.41) 09/13/2018   12:20:33  (  68.23,  -6.47)    2.70                33