Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2015 5 11.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 05/13/2015   15:55:01   ( -68.94, 120.49) 05/13/2015   15:56:02  ( -68.96, 120.51)    3.07                61
 05/13/2015   16:45:45   (  68.80, -72.02) 05/13/2015   16:45:30  (  68.80, -72.04)    0.96                15
 05/13/2015   17:36:18   ( -68.25,  96.02) 05/13/2015   17:35:07  ( -68.30,  94.98)   43.44                71
 05/16/2015   08:11:55   ( -68.87,-123.67) 05/16/2015   08:12:35  ( -68.88,-123.73)    2.33                40
 05/16/2015   09:02:39   (  68.79,  43.75) 05/16/2015   09:02:01  (  68.77,  43.78)    3.29                38
 05/18/2015   23:38:18   (  69.54,-176.15) 05/18/2015   23:39:27  (  69.42,-174.78)   55.09                69
 05/19/2015   00:28:49   ( -68.87,  -7.91) 05/19/2015   00:29:05  ( -68.88,  -7.85)    2.09                16
 05/19/2015   01:19:32   (  68.69, 159.65) 05/19/2015   01:18:33  (  68.71, 159.58)    3.53                59
 05/21/2015   15:55:02   (  68.96, -59.58) 05/21/2015   15:56:06  (  68.95, -59.51)    2.71                64
 05/21/2015   16:45:43   ( -68.83, 107.92) 05/21/2015   16:45:37  ( -68.80, 107.92)    3.43                 6
 05/21/2015   17:36:20   (  68.32, -84.11) 05/21/2015   17:35:09  (  68.40, -84.92)   34.43                71
 05/24/2015   08:11:56   (  68.92,  56.23) 05/24/2015   08:12:37  (  68.90,  56.30)    3.47                41
 05/24/2015   09:02:36   ( -68.74,-136.19) 05/24/2015   09:02:08  ( -68.75,-136.26)    3.13                28