Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2012 9 17.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/17/2012   20:01:42   ( -68.27,  57.83) ( -68.24,  57.82)    3.43                50
 09/17/2012   20:52:26   (  68.14,-134.69) (  68.13,-134.67)    1.18                27
 09/17/2012   21:42:51   ( -67.15,  33.83) ( -67.24,  31.95)   81.45                68
 09/20/2012   11:28:09   (  69.18,   5.08) (  69.11,   7.14)   82.11                67
 09/20/2012   12:18:35   ( -68.24, 173.64) ( -68.22, 173.68)    2.66                25
 09/20/2012   13:09:18   (  68.06, -18.81) (  68.05, -18.88)    2.83                50
 09/23/2012   03:44:46   (  68.30, 122.02) (  68.29, 122.01)    1.09                72
 09/23/2012   04:35:27   ( -68.17, -70.49) ( -68.19, -70.48)    2.41                 1
 09/23/2012   05:26:09   (  67.93,  97.12) (  67.96,  96.90)    9.50                72
 09/25/2012   20:01:37   (  68.25,-122.13) (  68.25,-122.15)    1.19                48
 09/25/2012   20:52:19   ( -68.16,  45.30) ( -68.15,  45.36)    2.82                24
 09/25/2012   21:42:45   (  67.06,-146.07) (  67.13,-148.15)   90.47                67
 09/28/2012   11:28:04   ( -69.33,-175.12) ( -69.21,-172.72)   95.35                66
 09/28/2012   12:18:29   (  68.20,  -6.29) (  68.20,  -6.33)    1.69                24
 09/28/2012   13:09:11   ( -68.11, 161.14) ( -68.10, 161.18)    2.37                48
 10/01/2012   03:44:40   ( -68.44, -58.13) ( -68.37, -57.88)   12.66                72
 10/01/2012   04:35:21   (  68.17, 109.53) (  68.19, 109.55)    2.69                 1
 10/01/2012   05:26:02   ( -68.02, -82.97) ( -68.04, -83.00)    2.41                71