Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2011 12 18.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2011   18:22:30   ( -68.56,  82.80) ( -68.53,  82.88)    5.03                72
 12/20/2011   19:13:13   (  68.37,-109.64) (  68.37,-109.67)    1.51                 3
 12/20/2011   20:03:53   ( -68.20,  57.90) ( -68.20,  57.76)    5.63                72
 12/23/2011   10:39:19   ( -68.50,-161.34) ( -68.49,-161.30)    2.44                53
 12/23/2011   11:30:02   (  68.31,   6.22) (  68.32,   6.15)    3.17                22
 12/23/2011   12:20:31   ( -67.55, 174.48) ( -67.60, 172.94)   65.64                70
 12/26/2011   02:56:09   ( -68.44, -45.48) ( -68.43, -45.49)    1.70                34
 12/26/2011   03:46:53   (  68.30, 122.00) (  68.31, 122.02)    1.14                43
 12/28/2011   18:22:26   (  68.93, -97.67) (  68.83, -96.74)   38.91                71
 12/28/2011   19:12:59   ( -68.38,  70.38) ( -68.40,  70.35)    2.31                14
 12/28/2011   20:03:43   (  68.24,-122.14) (  68.23,-122.21)    3.42                62
 12/31/2011   10:39:09   (  68.50,  18.68) (  68.51,  18.73)    2.06                63
 12/31/2011   11:29:50   ( -68.37,-173.84) ( -68.35,-173.82)    2.53                 7
 12/31/2011   12:20:27   (  67.86,  -5.88) (  67.89,  -6.72)   35.09                71