Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 8 12.  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)
 08/12/2017   04:37:30   (  67.74, 110.02) 08/12/2017   04:36:19  (  67.78, 109.09)   39.86                71
 08/14/2017   19:13:08   (  68.36,-109.62) 08/14/2017   19:13:45  (  68.34,-109.67)    2.98                37
 08/14/2017   20:03:49   ( -68.21,  57.89) 08/14/2017   20:03:15  ( -68.23,  57.83)    3.41                34
 08/17/2017   10:39:31   ( -68.98,-161.99) 08/17/2017   10:40:41  ( -68.84,-160.82)   49.38                70
 08/17/2017   11:30:05   (  68.33,   6.18) 08/17/2017   11:30:15  (  68.34,   6.21)    1.67                10
 08/17/2017   12:20:46   ( -68.18, 173.69) 08/17/2017   12:19:46  ( -68.18, 173.65)    1.75                60
 08/20/2017   02:56:18   ( -68.42, -45.48) 08/20/2017   02:57:19  ( -68.41, -45.48)    1.86                61
 08/20/2017   03:47:02   (  68.31, 121.97) 08/20/2017   03:46:46  (  68.29, 122.03)    3.16                16
 08/20/2017   04:37:35   ( -67.73, -69.98) 08/20/2017   04:36:24  ( -67.74, -70.99)   42.55                71
 08/22/2017   19:13:14   ( -68.35,  70.38) 08/22/2017   19:13:50  ( -68.36,  70.34)    2.59                36
 08/22/2017   20:03:58   (  68.24,-122.17) 08/22/2017   20:03:17  (  68.25,-122.15)    1.25                41
 08/25/2017   10:39:35   (  68.81,  18.22) 08/25/2017   10:40:45  (  68.70,  18.99)   33.44                70
 08/25/2017   11:30:10   ( -68.32,-173.83) 08/25/2017   11:30:20  ( -68.32,-173.84)    0.62                10
 08/25/2017   12:20:54   (  68.22,  -6.38) 08/25/2017   12:19:47  (  68.21,  -6.33)    2.70                67