Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 6 14.  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)
 06/17/2017   02:55:56   ( -68.41, -45.42) 06/17/2017   02:56:57  ( -68.39, -45.40)    2.00                61
 06/17/2017   03:46:40   (  68.26, 122.06) 06/17/2017   03:46:24  (  68.28, 122.11)    2.42                16
 06/17/2017   04:37:13   ( -67.71, -69.93) 06/17/2017   04:36:02  ( -67.73, -70.90)   41.12                71
 06/19/2017   19:12:50   ( -68.36,  70.41) 06/19/2017   19:13:27  ( -68.33,  70.41)    2.99                37
 06/19/2017   20:03:34   (  68.22,-122.10) 06/19/2017   20:02:54  (  68.21,-122.09)    0.99                40
 06/22/2017   10:39:10   (  68.82,  18.26) 06/22/2017   10:40:21  (  68.70,  19.11)   36.45                71
 06/22/2017   11:29:44   ( -68.31,-173.75) 06/22/2017   11:29:56  ( -68.32,-173.73)    1.43                12
 06/22/2017   12:20:28   (  68.18,  -6.27) 06/22/2017   12:19:23  (  68.20,  -6.22)    3.30                65
 06/25/2017   02:55:56   (  68.40, 134.59) 06/25/2017   02:56:54  (  68.40, 134.62)    1.27                58
 06/25/2017   03:46:37   ( -68.27, -57.92) 06/25/2017   03:46:25  ( -68.24, -57.93)    2.58                12
 06/25/2017   04:37:11   (  67.60, 110.22) 06/25/2017   04:36:01  (  67.62, 108.98)   52.43                70
 06/27/2017   19:12:50   (  68.36,-109.59) 06/27/2017   19:13:23  (  68.37,-109.54)    2.32                33
 06/27/2017   20:03:31   ( -68.22,  57.91) 06/27/2017   20:02:54  ( -68.22,  57.92)    0.86                37