Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 30.  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)
 10/01/2017   18:23:01   ( -68.74,  82.58) 10/01/2017   18:24:12  ( -68.69,  83.07)   20.56                71
 10/01/2017   19:13:41   (  68.39,-109.65) 10/01/2017   19:13:42  (  68.41,-109.63)    2.46                 1
 10/01/2017   20:04:22   ( -68.26,  57.83) 10/01/2017   20:03:13  ( -68.25,  57.81)    1.51                69
 10/04/2017   10:39:50   ( -68.44,-161.27) 10/04/2017   10:40:43  ( -68.46,-161.33)    3.43                53
 10/04/2017   11:30:35   (  68.36,   6.14) 10/04/2017   11:30:10  (  68.34,   6.18)    2.33                25
 10/04/2017   12:21:02   ( -67.48, 174.56) 10/04/2017   12:19:53  ( -67.51, 172.85)   72.97                69
 10/07/2017   02:06:20   (  69.40, 145.87) 10/07/2017   02:07:27  (  69.32, 148.01)   84.53                67
 10/07/2017   02:56:45   ( -68.41, -45.47) 10/07/2017   02:57:11  ( -68.44, -45.46)    3.48                26
 10/07/2017   03:47:29   (  68.28, 122.01) 10/07/2017   03:46:39  (  68.27, 121.97)    2.14                50
 10/09/2017   18:22:59   (  68.52, -97.17) 10/09/2017   18:24:09  (  68.52, -97.12)    1.95                70
 10/09/2017   19:13:40   ( -68.39,  70.33) 10/09/2017   19:13:40  ( -68.36,  70.32)    2.93                 0
 10/09/2017   20:04:21   (  68.10,-122.00) 10/09/2017   20:03:09  (  68.13,-122.31)   13.51                72
 10/12/2017   10:39:53   (  68.45,  18.69) 10/12/2017   10:40:38  (  68.43,  18.65)    3.23                45
 10/12/2017   11:30:34   ( -68.32,-173.82) 10/12/2017   11:30:08  ( -68.33,-173.84)    1.70                26