Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 8 15.  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)
 08/15/2018   03:47:01   ( -68.35, -58.07) 08/15/2018   03:47:44  ( -68.34, -58.12)    2.71                43
 08/15/2018   04:37:45   (  68.23, 109.40) 08/15/2018   04:37:11  (  68.23, 109.40)    0.42                34
 08/17/2018   19:13:25   (  68.98,-110.46) 08/17/2018   19:14:34  (  68.90,-109.19)   51.85                69
 08/17/2018   20:03:57   ( -68.35,  57.70) 08/17/2018   20:04:12  ( -68.34,  57.76)    3.03                15
 08/17/2018   20:54:40   (  68.18,-134.77) 08/17/2018   20:53:40  (  68.17,-134.79)    1.00                60
 08/20/2018   11:30:11   (  68.40,   6.09) 08/20/2018   11:31:12  (  68.40,   6.08)    0.49                61
 08/20/2018   12:20:53   ( -68.30, 173.53) 08/20/2018   12:20:42  ( -68.29, 173.58)    2.21                11
 08/20/2018   13:11:28   (  67.70, -18.41) 08/20/2018   13:10:17  (  67.73, -19.43)   43.24                71
 08/23/2018   03:47:07   (  68.35, 121.92) 08/23/2018   03:47:42  (  68.36, 121.90)    0.88                35
 08/23/2018   04:37:49   ( -68.25, -70.63) 08/23/2018   04:37:12  ( -68.25, -70.59)    1.77                37
 08/25/2018   19:13:28   ( -68.89,  69.66) 08/25/2018   19:14:39  ( -68.77,  70.64)   41.81                71
 08/25/2018   20:04:03   (  68.31,-122.26) 08/25/2018   20:04:12  (  68.32,-122.26)    2.11                 9
 08/25/2018   20:54:45   ( -68.20,  45.20) 08/25/2018   20:53:42  ( -68.22,  45.25)    3.13                63
 08/28/2018   11:30:15   ( -68.42,-173.94) 08/28/2018   11:31:14  ( -68.42,-173.92)    1.04                59
 08/28/2018   12:20:58   (  68.26,  -6.43) 08/28/2018   12:20:42  (  68.24,  -6.48)    2.68                16
 08/28/2018   13:11:31   ( -67.67, 161.62) 08/28/2018   13:10:20  ( -67.70, 160.51)   46.97                71