Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2012 12 12.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2012   20:01:46   (  68.22,-122.15) (  68.23,-122.10)    2.54                48
 12/14/2012   20:52:27   ( -68.09,  45.33) ( -68.06,  45.34)    3.20                22
 12/14/2012   21:42:54   (  67.03,-146.09) (  67.11,-148.09)   87.14                67
 12/17/2012   11:28:14   ( -69.28,-175.11) ( -69.21,-172.64)   97.84                66
 12/17/2012   12:18:39   (  68.13,  -6.27) (  68.15,  -6.30)    3.12                25
 12/17/2012   13:09:21   ( -68.06, 161.15) ( -68.05, 161.20)    2.62                47
 12/20/2012   03:44:52   ( -68.39, -58.14) ( -68.35, -57.83)   13.47                72
 12/20/2012   04:35:33   (  68.10, 109.55) (  68.13, 109.55)    3.06                 0
 12/20/2012   05:26:14   ( -67.97, -82.97) ( -67.97, -83.01)    1.48                70
 12/22/2012   20:01:42   ( -68.20,  57.88) ( -68.21,  57.89)    0.57                52
 12/22/2012   20:52:26   (  68.07,-134.64) (  68.09,-134.61)    2.48                25
 12/22/2012   21:42:53   ( -67.19,  33.75) ( -67.26,  32.08)   72.33                69
 12/25/2012   11:28:12   (  69.22,   4.98) (  69.10,   7.25)   90.72                66
 12/25/2012   12:18:36   ( -68.18, 173.69) ( -68.17, 173.72)    1.82                27
 12/25/2012   13:09:20   (  68.05, -18.84) (  68.05, -18.78)    2.50                50