Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 7 9.  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)
 07/11/2017   02:55:53   (  68.38, 134.65) 07/11/2017   02:57:00  (  68.38, 134.58)    2.56                67
 07/11/2017   03:46:35   ( -68.30, -57.93) 07/11/2017   03:46:30  ( -68.27, -57.91)    3.04                 5
 07/11/2017   04:37:13   (  67.84, 109.95) 07/11/2017   04:36:01  (  67.94, 109.34)   27.43                72
 07/13/2017   19:12:46   (  68.35,-109.54) 07/13/2017   19:13:31  (  68.35,-109.57)    1.56                45
 07/13/2017   20:03:28   ( -68.26,  57.88) 07/13/2017   20:03:01  ( -68.25,  57.94)    2.46                27
 07/16/2017   10:39:14   ( -69.40,-162.50) 07/16/2017   10:40:21  ( -69.30,-160.16)   92.46                67
 07/16/2017   11:29:40   (  68.32,   6.27) 07/16/2017   11:30:04  (  68.30,   6.22)    3.30                24
 07/16/2017   12:20:21   ( -68.18, 173.77) 07/16/2017   12:19:34  ( -68.20, 173.74)    2.59                47
 07/19/2017   02:55:55   ( -68.68, -45.73) 07/19/2017   02:57:06  ( -68.60, -45.19)   23.61                71
 07/19/2017   03:46:34   (  68.30, 122.08) 07/19/2017   03:46:36  (  68.31, 122.11)    2.56                 2
 07/19/2017   04:37:15   ( -68.15, -70.42) 07/19/2017   04:36:07  ( -68.16, -70.44)    2.04                68
 07/21/2017   19:12:44   ( -68.38,  70.43) 07/21/2017   19:13:43  ( -68.36,  70.39)    2.67                59
 07/21/2017   20:03:28   (  68.27,-122.12) 07/21/2017   20:03:10  (  68.24,-122.11)    3.27                18
 07/21/2017   20:53:59   ( -67.58,  46.06) 07/21/2017   20:52:49  ( -67.65,  44.83)   52.69                70