Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2012 4 10.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 04/10/2012   19:12:19   (  68.32,-109.67) (  68.30,-109.67)    1.68                40
 04/10/2012   20:03:00   ( -68.20,  57.81) ( -68.20,  57.84)    1.22                31
 04/13/2012   10:38:44   ( -69.26,-162.47) ( -69.14,-160.41)   82.58                67
 04/13/2012   11:29:12   (  68.27,   6.17) (  68.25,   6.14)    2.39                20
 04/13/2012   12:19:53   ( -68.15, 173.65) ( -68.15, 173.65)    0.08                51
 04/16/2012   02:55:23   ( -68.53, -45.70) ( -68.46, -45.38)   14.66                71
 04/16/2012   03:46:04   (  68.23, 121.99) (  68.24, 121.99)    1.17                 1
 04/16/2012   04:36:45   ( -68.10, -70.53) ( -68.08, -70.56)    2.78                71
 04/18/2012   19:12:13   ( -68.34,  70.32) ( -68.33,  70.33)    0.59                55
 04/18/2012   20:02:57   (  68.20,-122.20) (  68.21,-122.17)    2.01                22
 04/18/2012   20:53:26   ( -67.43,  46.07) ( -67.50,  44.64)   61.31                70
 04/21/2012   11:29:06   ( -68.32,-173.88) ( -68.30,-173.85)    2.88                34
 04/21/2012   12:19:50   (  68.18,  -6.41) (  68.18,  -6.34)    2.75                43
 04/24/2012   02:55:25   (  68.82, 133.92) (  68.73, 134.93)   41.75                70