Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 5 15.  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)
 05/16/2017   02:55:57   ( -68.39, -45.42) 05/16/2017   02:56:56  ( -68.37, -45.42)    2.12                59
 05/16/2017   03:46:41   (  68.25, 122.06) 05/16/2017   03:46:23  (  68.26, 122.09)    1.68                18
 05/16/2017   04:37:12   ( -67.58, -69.79) 05/16/2017   04:36:02  ( -67.65, -70.98)   50.88                70
 05/18/2017   19:12:51   ( -68.31,  70.45) 05/18/2017   19:13:26  ( -68.31,  70.39)    2.22                35
 05/18/2017   20:03:35   (  68.18,-122.08) 05/18/2017   20:02:53  (  68.20,-122.10)    2.09                42
 05/21/2017   10:39:10   (  68.69,  18.39) 05/21/2017   10:40:22  (  68.57,  18.96)   26.59                72
 05/21/2017   11:29:46   ( -68.29,-173.76) 05/21/2017   11:29:55  ( -68.30,-173.74)    1.30                 9
 05/21/2017   12:20:30   (  68.16,  -6.29) 05/21/2017   12:19:22  (  68.19,  -6.23)    3.44                68
 05/24/2017   02:55:58   (  68.36, 134.61) 05/24/2017   02:56:53  (  68.39, 134.62)    3.29                55
 05/24/2017   03:46:39   ( -68.22, -57.90) 05/24/2017   03:46:24  ( -68.23, -57.94)    1.83                15
 05/24/2017   04:37:11   (  67.45, 110.37) 05/24/2017   04:36:02  (  67.50, 108.86)   64.69                69
 05/26/2017   19:12:52   (  68.29,-109.54) 05/26/2017   19:13:23  (  68.31,-109.60)    3.06                31
 05/26/2017   20:03:34   ( -68.21,  57.89) 05/26/2017   20:02:53  ( -68.21,  57.92)    1.25                41
 05/29/2017   10:39:09   ( -68.73,-161.65) 05/29/2017   10:40:21  ( -68.63,-160.98)   29.59                72
 05/29/2017   11:29:47   (  68.29,   6.25) 05/29/2017   11:29:52  (  68.28,   6.25)    0.59                 5
 05/29/2017   12:20:28   ( -68.15, 173.74) 05/29/2017   12:19:23  ( -68.13, 173.70)    2.67                65