Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2016 9 18.  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   ( -68.40, -45.37) 09/18/2016   02:57:03  ( -68.39, -45.42)    2.09                33
 09/18/2016   03:47:15   (  68.31, 122.05) 09/18/2016   03:46:30  (  68.29, 122.11)    3.27                45
 09/20/2016   18:22:52   (  68.79, -97.45) 09/20/2016   18:24:03  (  68.70, -96.82)   27.70                71
 09/20/2016   19:13:27   ( -68.34,  70.46) 09/20/2016   19:13:37  ( -68.37,  70.41)    3.22                10
 09/20/2016   20:04:12   (  68.26,-122.12) 09/20/2016   20:03:04  (  68.26,-122.07)    2.35                68
 09/23/2016   10:39:44   (  68.47,  18.73) 09/23/2016   10:40:44  (  68.49,  18.77)    2.41                60
 09/23/2016   11:30:25   ( -68.34,-173.78) 09/23/2016   11:30:15  ( -68.33,-173.79)    1.27                10
 09/23/2016   12:20:59   (  67.72,  -5.69) 09/23/2016   12:19:49  (  67.78,  -6.79)   46.71                70
 09/26/2016   02:56:40   (  68.42, 134.55) 09/26/2016   02:57:25  (  68.44, 134.54)    2.09                45
 09/26/2016   03:47:21   ( -68.29, -57.96) 09/26/2016   03:46:56  ( -68.29, -58.01)    1.94                25
 09/26/2016   04:37:47   (  67.18, 110.71) 09/26/2016   04:36:40  (  67.23, 108.43)   98.42                67
 09/28/2016   19:13:38   (  68.43,-109.70) 09/28/2016   19:14:10  (  68.45,-109.64)    2.77                32
 09/28/2016   20:04:19   ( -68.30,  57.79) 09/28/2016   20:03:41  ( -68.30,  57.82)    1.08                38
 10/01/2016   10:40:10   ( -69.53,-162.76) 10/01/2016   10:41:16  ( -69.43,-160.24)   98.99                66
 10/01/2016   11:30:35   (  68.39,   6.11) 10/01/2016   11:31:00  (  68.39,   6.08)    1.37                25
 10/01/2016   12:21:16   ( -68.26, 173.61) 10/01/2016   12:20:31  ( -68.25, 173.55)    2.49                45