Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2012 7 19.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/21/2012   03:45:01   (  68.30, 122.03) (  68.31, 122.05)    1.31                64
 07/21/2012   04:35:42   ( -68.16, -70.47) ( -68.14, -70.51)    2.81                 6
 07/21/2012   05:26:20   (  67.71,  97.40) (  67.75,  96.68)   30.53                72
 07/23/2012   20:01:56   (  68.26,-122.15) (  68.23,-122.15)    3.02                38
 07/23/2012   20:52:37   ( -68.12,  45.35) ( -68.12,  45.35)    0.67                33
 07/26/2012   11:28:17   ( -68.88,-174.51) ( -68.75,-173.28)   51.36                70
 07/26/2012   12:18:51   (  68.22,  -6.34) (  68.19,  -6.31)    3.15                11
 07/26/2012   13:09:32   ( -68.08, 161.16) ( -68.09, 161.20)    1.83                60
 07/29/2012   03:45:02   ( -68.30, -57.98) ( -68.31, -57.93)    2.18                60
 07/29/2012   04:35:45   (  68.12, 109.55) (  68.13, 109.50)    2.13                15
 07/29/2012   05:26:18   ( -67.55, -82.43) ( -67.64, -83.43)   43.86                71
 07/31/2012   20:01:56   ( -68.26,  57.84) ( -68.23,  57.86)    2.97                33
 07/31/2012   20:52:39   (  68.08,-134.63) (  68.11,-134.64)    2.86                43