Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 6 20.  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)
 06/22/2017   10:39:10   (  68.84,  18.22) 06/22/2017   10:40:20  (  68.74,  19.15)   39.29                70
 06/22/2017   11:29:43   ( -68.29,-173.73) 06/22/2017   11:29:56  ( -68.31,-173.74)    1.67                13
 06/22/2017   12:20:27   (  68.15,  -6.24) 06/22/2017   12:19:24  (  68.13,  -6.31)    3.51                63
 06/25/2017   02:55:56   (  68.37, 134.62) 06/25/2017   02:56:55  (  68.41, 134.62)    3.53                59
 06/25/2017   03:46:37   ( -68.25, -57.90) 06/25/2017   03:46:26  ( -68.26, -57.93)    1.34                11
 06/25/2017   04:37:12   (  67.63, 110.19) 06/25/2017   04:36:01  (  67.68, 109.05)   48.31                71
 06/27/2017   19:12:50   (  68.34,-109.55) 06/27/2017   19:13:25  (  68.35,-109.57)    1.79                35
 06/27/2017   20:03:31   ( -68.21,  57.93) 06/27/2017   20:02:56  ( -68.20,  57.89)    1.83                35
 06/30/2017   10:39:10   ( -68.96,-161.92) 06/30/2017   10:40:20  ( -68.87,-160.70)   49.89                70
 06/30/2017   11:29:44   (  68.30,   6.27) 06/30/2017   11:29:55  (  68.30,   6.25)    0.88                11
 06/30/2017   12:20:25   ( -68.16, 173.76) 06/30/2017   12:19:26  ( -68.15, 173.70)    2.86                59
 07/03/2017   02:55:53   ( -68.38, -45.38) 07/03/2017   02:56:57  ( -68.37, -45.43)    2.92                64
 07/03/2017   03:46:37   (  68.26, 122.09) 07/03/2017   03:46:24  (  68.24, 122.06)    2.53                13
 07/03/2017   04:37:11   ( -67.75, -69.95) 07/03/2017   04:36:00  ( -67.82, -70.81)   36.99                71