Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 8 13.  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)
 08/14/2017   19:13:08   (  68.34,-109.59) 08/14/2017   19:13:45  (  68.35,-109.65)    2.64                37
 08/14/2017   20:03:50   ( -68.25,  57.85) 08/14/2017   20:03:15  ( -68.24,  57.85)    0.38                35
 08/17/2017   10:39:31   ( -68.97,-161.97) 08/17/2017   10:40:41  ( -68.85,-160.80)   48.42                70
 08/17/2017   11:30:05   (  68.32,   6.20) 08/17/2017   11:30:16  (  68.30,   6.16)    2.72                11
 08/17/2017   12:20:47   ( -68.22, 173.64) 08/17/2017   12:19:46  ( -68.19, 173.67)    3.24                61
 08/20/2017   02:56:18   ( -68.41, -45.46) 08/20/2017   02:57:19  ( -68.42, -45.47)    0.68                61
 08/20/2017   03:47:02   (  68.30, 121.99) 08/20/2017   03:46:46  (  68.30, 122.04)    2.05                16
 08/20/2017   04:37:34   ( -67.71, -69.96) 08/20/2017   04:36:23  ( -67.75, -70.97)   42.87                71
 08/22/2017   19:13:14   ( -68.39,  70.33) 08/22/2017   19:13:49  ( -68.37,  70.34)    2.62                35
 08/22/2017   20:03:57   (  68.23,-122.16) 08/22/2017   20:03:16  (  68.25,-122.15)    2.68                41
 08/25/2017   10:39:35   (  68.80,  18.23) 08/25/2017   10:40:45  (  68.70,  18.99)   32.75                70
 08/25/2017   11:30:10   ( -68.32,-173.82) 08/25/2017   11:30:20  ( -68.32,-173.84)    0.82                10
 08/25/2017   12:20:54   (  68.21,  -6.37) 08/25/2017   12:19:47  (  68.20,  -6.33)    1.95                67