Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 4 19.  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   ( -68.27,  70.24) ( -68.27,  70.19)    2.06                71
 04/21/2013   20:03:16   (  68.13,-122.27) (  68.16,-122.29)    3.19                 6
 04/21/2013   20:53:55   ( -67.90,  45.34) ( -67.94,  45.08)   11.66                73
 04/24/2013   11:29:28   ( -68.23,-173.93) ( -68.25,-173.95)    2.48                43
 04/24/2013   12:20:12   (  68.09,  -6.45) (  68.08,  -6.50)    2.55                33
 04/27/2013   02:55:51   (  68.80, 133.77) (  68.71, 134.87)   45.27                70
 04/27/2013   03:46:23   ( -68.19, -58.11) ( -68.21, -58.10)    2.80                15
 04/27/2013   04:37:07   (  68.05, 109.37) (  68.04, 109.34)    2.00                61
 04/29/2013   19:12:38   (  68.28,-109.77) (  68.26,-109.79)    2.42                58
 04/29/2013   20:03:19   ( -68.15,  57.71) ( -68.16,  57.72)    0.98                13
 04/29/2013   20:53:52   (  67.42,-134.08) (  67.47,-135.42)   57.46                69
 05/02/2013   11:29:34   (  68.25,   6.04) (  68.24,   6.07)    1.55                29
 05/02/2013   12:20:15   ( -68.11, 173.53) ( -68.09, 173.52)    3.23                41