Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 5 12.  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)
 05/13/2017   10:39:11   ( -68.84,-161.80) 05/13/2017   10:40:21  ( -68.74,-160.84)   40.55                70
 05/13/2017   11:29:47   (  68.29,   6.24) 05/13/2017   11:29:54  (  68.30,   6.27)    2.30                 7
 05/13/2017   12:20:28   ( -68.15, 173.73) 05/13/2017   12:19:25  ( -68.13, 173.70)    2.83                63
 05/16/2017   02:55:56   ( -68.34, -45.36) 05/16/2017   02:56:56  ( -68.35, -45.43)    3.12                60
 05/16/2017   03:46:41   (  68.26, 122.04) 05/16/2017   03:46:23  (  68.25, 122.09)    2.67                18
 05/16/2017   04:37:12   ( -67.59, -69.80) 05/16/2017   04:36:02  ( -67.63, -70.99)   50.65                70
 05/18/2017   19:12:51   ( -68.32,  70.44) 05/18/2017   19:13:26  ( -68.29,  70.38)    3.49                35
 05/18/2017   20:03:35   (  68.19,-122.09) 05/18/2017   20:02:53  (  68.18,-122.11)    0.85                42
 05/21/2017   10:39:10   (  68.70,  18.38) 05/21/2017   10:40:21  (  68.61,  19.02)   27.55                71
 05/21/2017   11:29:46   ( -68.30,-173.77) 05/21/2017   11:29:55  ( -68.29,-173.75)    1.62                 9
 05/21/2017   12:20:30   (  68.17,  -6.30) 05/21/2017   12:19:22  (  68.17,  -6.24)    2.39                68
 05/24/2017   02:55:59   (  68.36, 134.60) 05/24/2017   02:56:54  (  68.37, 134.61)    0.83                55
 05/24/2017   03:46:40   ( -68.23, -57.90) 05/24/2017   03:46:25  ( -68.22, -57.95)    2.32                15
 05/24/2017   04:37:12   (  67.45, 110.36) 05/24/2017   04:36:03  (  67.48, 108.85)   64.60                69
 05/26/2017   19:12:53   (  68.35,-109.61) 05/26/2017   19:13:22  (  68.35,-109.54)    2.83                29