Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 7 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)
 07/13/2017   19:12:47   (  68.36,-109.56) 07/13/2017   19:13:31  (  68.34,-109.60)    3.02                44
 07/13/2017   20:03:28   ( -68.23,  57.93) 07/13/2017   20:03:01  ( -68.24,  57.92)    1.43                27
 07/16/2017   10:39:13   ( -69.36,-162.45) 07/16/2017   10:40:20  ( -69.22,-160.26)   87.50                67
 07/16/2017   11:29:40   (  68.33,   6.25) 07/16/2017   11:30:01  (  68.33,   6.26)    1.08                21
 07/16/2017   12:20:21   ( -68.20, 173.75) 07/16/2017   12:19:32  ( -68.17, 173.71)    2.96                49
 07/19/2017   02:55:52   ( -68.54, -45.54) 07/19/2017   02:57:04  ( -68.49, -45.32)   10.66                72
 07/19/2017   03:46:34   (  68.31, 122.06) 07/19/2017   03:46:32  (  68.31, 122.11)    2.22                 2
 07/19/2017   04:37:15   ( -68.17, -70.44) 07/19/2017   04:36:03  ( -68.16, -70.43)    0.90                72
 07/21/2017   19:12:44   ( -68.40,  70.41) 07/21/2017   19:13:36  ( -68.41,  70.46)    2.69                52
 07/21/2017   20:03:27   (  68.24,-122.07) 07/21/2017   20:03:04  (  68.23,-122.11)    1.52                23
 07/21/2017   20:53:55   ( -67.39,  46.29) 07/21/2017   20:52:46  ( -67.47,  44.65)   70.92                69
 07/24/2017   11:29:37   ( -68.33,-173.72) 07/24/2017   11:30:08  ( -68.34,-173.76)    2.08                31
 07/24/2017   12:20:21   (  68.22,  -6.27) 07/24/2017   12:19:35  (  68.21,  -6.26)    0.69                46
 07/27/2017   02:55:53   (  68.68, 134.28) 07/27/2017   02:57:05  (  68.57, 134.77)   23.04                72
 07/27/2017   03:46:30   ( -68.30, -57.91) 07/27/2017   03:46:38  ( -68.31, -57.91)    0.96                 8
 07/27/2017   04:37:14   (  68.20, 109.53) 07/27/2017   04:36:05  (  68.19, 109.58)    2.70                69