Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2011 12 16.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/18/2011   02:05:51   ( -69.24, -33.90) ( -69.13, -32.23)   67.16                69
 12/18/2011   02:56:22   (  68.41, 134.53) (  68.42, 134.52)    1.66                16
 12/18/2011   03:47:03   ( -68.29, -58.00) ( -68.31, -57.98)    1.92                55
 12/20/2011   18:22:29   ( -68.57,  82.79) ( -68.55,  82.91)    5.21                72
 12/20/2011   19:13:12   (  68.37,-109.64) (  68.39,-109.64)    1.38                 3
 12/20/2011   20:03:53   ( -68.26,  57.82) ( -68.28,  57.86)    2.57                74
 12/23/2011   10:39:18   ( -68.50,-161.33) ( -68.49,-161.28)    2.00                54
 12/23/2011   11:30:02   (  68.36,   6.16) (  68.33,   6.16)    3.50                22
 12/23/2011   12:20:30   ( -67.54, 174.49) ( -67.61, 172.96)   65.58                69
 12/26/2011   02:56:06   ( -68.44, -45.47) ( -68.47, -45.44)    3.22                35
 12/26/2011   03:46:50   (  68.30, 122.01) (  68.29, 122.00)    0.98                41
 12/28/2011   18:22:24   (  69.05, -97.82) (  68.96, -96.58)   50.85                69
 12/28/2011   19:12:55   ( -68.40,  70.37) ( -68.41,  70.38)    1.60                16
 12/28/2011   20:03:39   (  68.26,-122.15) (  68.24,-122.19)    3.28                60