Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2016 9 17.  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)
 09/18/2016   02:56:30   ( -68.42, -45.40) 09/18/2016   02:57:02  ( -68.42, -45.38)    0.93                32
 09/18/2016   03:47:14   (  68.28, 122.09) 09/18/2016   03:46:30  (  68.27, 122.08)    1.74                44
 09/20/2016   18:22:52   (  68.82, -97.48) 09/20/2016   18:24:02  (  68.72, -96.78)   30.07                70
 09/20/2016   19:13:27   ( -68.37,  70.43) 09/20/2016   19:13:36  ( -68.39,  70.44)    2.00                 9
 09/20/2016   20:04:11   (  68.23,-122.08) 09/20/2016   20:03:04  (  68.23,-122.10)    0.96                67
 09/23/2016   10:39:43   (  68.44,  18.77) 09/23/2016   10:40:44  (  68.45,  18.72)    2.02                61
 09/23/2016   11:30:24   ( -68.31,-173.74) 09/23/2016   11:30:14  ( -68.34,-173.77)    3.14                10
 09/23/2016   12:21:00   (  67.74,  -5.72) 09/23/2016   12:19:49  (  67.79,  -6.77)   44.54                71
 09/26/2016   02:56:41   (  68.45, 134.52) 09/26/2016   02:57:25  (  68.44, 134.54)    1.44                44
 09/26/2016   03:47:22   ( -68.32, -57.99) 09/26/2016   03:46:55  ( -68.34, -57.95)    2.86                27
 09/28/2016   19:13:37   (  68.40,-109.66) 09/28/2016   19:14:09  (  68.42,-109.67)    1.47                32
 09/28/2016   20:04:18   ( -68.27,  57.83) 09/28/2016   20:03:40  ( -68.27,  57.78)    2.02                38