Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 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)
 09/13/2017   02:56:36   (  68.40, 134.49) 09/13/2017   02:57:18  (  68.40, 134.49)    0.42                42
 09/13/2017   03:47:17   ( -68.26, -58.01) 09/13/2017   03:46:48  ( -68.29, -58.01)    2.93                29
 09/15/2017   18:23:01   ( -69.17,  81.91) 09/15/2017   18:24:10  ( -69.06,  83.55)   65.94                69
 09/15/2017   19:13:32   (  68.35,-109.67) 09/15/2017   19:13:48  (  68.34,-109.70)    1.83                16
 09/15/2017   20:04:13   ( -68.21,  57.82) 09/15/2017   20:03:18  ( -68.23,  57.80)    2.54                55
 09/18/2017   10:39:44   ( -68.43,-161.32) 09/18/2017   10:40:50  ( -68.45,-161.33)    2.86                66
 09/18/2017   11:30:28   (  68.30,   6.15) 09/18/2017   11:30:18  (  68.28,   6.10)    3.21                10
 09/18/2017   12:21:04   ( -67.89, 173.99) 09/18/2017   12:19:52  ( -67.95, 173.35)   27.42                72
 09/21/2017   02:56:40   ( -68.38, -45.49) 09/21/2017   02:57:20  ( -68.40, -45.52)    2.35                40
 09/21/2017   03:47:24   (  68.26, 121.98) 09/21/2017   03:46:47  (  68.28, 121.98)    2.53                37
 09/23/2017   18:23:02   (  68.91, -97.74) 09/23/2017   18:24:12  (  68.83, -96.74)   41.14                70
 09/23/2017   19:13:35   ( -68.34,  70.33) 09/23/2017   19:13:49  ( -68.35,  70.29)    1.92                14
 09/23/2017   20:04:19   (  68.21,-122.20) 09/23/2017   20:03:16  (  68.23,-122.21)    1.18                63