Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2016 9 20.  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)
 09/20/2016   18:22:50   (  68.67, -97.29) 09/20/2016   18:24:01  (  68.60, -96.91)   17.21                71
 09/20/2016   19:13:28   ( -68.39,  70.40) 09/20/2016   19:13:33  ( -68.39,  70.46)    2.52                 5
 09/20/2016   20:04:12   (  68.24,-122.11) 09/20/2016   20:03:01  (  68.22,-122.10)    2.87                71
 09/23/2016   10:39:43   (  68.46,  18.75) 09/23/2016   10:40:33  (  68.46,  18.78)    1.32                50
 09/23/2016   11:30:24   ( -68.33,-173.77) 09/23/2016   11:30:04  ( -68.30,-173.77)    3.10                20
 09/23/2016   12:20:53   (  67.38,  -5.28) 09/23/2016   12:19:45  (  67.40,  -7.17)   80.64                68
 09/26/2016   02:56:40   (  68.41, 134.57) 09/26/2016   02:57:05  (  68.39, 134.57)    2.08                25
 09/26/2016   03:47:21   ( -68.28, -57.94) 09/26/2016   03:46:35  ( -68.30, -57.91)    2.33                46
 09/28/2016   18:22:56   ( -68.66,  82.70) 09/28/2016   18:24:08  ( -68.58,  83.03)   15.77                72
 09/28/2016   19:13:37   (  68.36,-109.61) 09/28/2016   19:13:37  (  68.35,-109.61)    1.37                 0
 09/28/2016   20:04:18   ( -68.23,  57.88) 09/28/2016   20:03:08  ( -68.20,  57.85)    3.36                70
 10/01/2016   10:39:50   ( -68.45,-161.27) 10/01/2016   10:40:42  ( -68.46,-161.25)    1.13                52
 10/01/2016   11:30:34   (  68.32,   6.21) 10/01/2016   11:30:09  (  68.33,   6.24)    2.18                25
 10/01/2016   12:21:01   ( -67.43, 174.63) 10/01/2016   12:19:52  ( -67.52, 172.93)   73.16                69
 10/04/2016   02:06:22   (  69.45, 145.80) 10/04/2016   02:07:29  (  69.33, 148.09)   90.29                67