Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 4 20.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 04/21/2013   19:12:32   ( -68.29,  70.22) ( -68.26,  70.19)    2.87                71
 04/21/2013   20:03:16   (  68.14,-122.28) (  68.16,-122.30)    1.58                 6
 04/21/2013   20:53:55   ( -67.91,  45.32) ( -67.93,  45.08)   10.49                73
 04/24/2013   11:29:28   ( -68.24,-173.95) ( -68.26,-173.94)    1.56                43
 04/24/2013   12:20:12   (  68.10,  -6.46) (  68.09,  -6.49)    1.90                33
 04/27/2013   02:55:52   (  68.81, 133.76) (  68.73, 134.89)   46.48                70
 04/27/2013   03:46:24   ( -68.20, -58.12) ( -68.18, -58.14)    2.56                16
 04/27/2013   04:37:08   (  68.06, 109.36) (  68.06, 109.36)    0.45                61
 04/29/2013   19:12:38   (  68.28,-109.78) (  68.30,-109.74)    2.40                58
 04/29/2013   20:03:19   ( -68.16,  57.70) ( -68.14,  57.70)    1.81                12
 04/29/2013   20:53:53   (  67.48,-134.15) (  67.52,-135.37)   52.06                70
 05/02/2013   11:29:34   (  68.25,   6.03) (  68.25,   6.08)    2.06                30
 05/02/2013   12:20:15   ( -68.12, 173.52) ( -68.10, 173.53)    2.97                40