Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 9 22.  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)
 09/24/2018   02:56:45   ( -68.78, -45.98) 09/24/2018   02:57:57  ( -68.65, -45.37)   28.99                72
 09/24/2018   03:47:23   (  68.33, 121.91) 09/24/2018   03:47:28  (  68.31, 121.88)    2.52                 5
 09/24/2018   04:38:04   ( -68.19, -70.59) 09/24/2018   04:36:58  ( -68.20, -70.62)    1.75                66
 09/26/2018   19:13:35   ( -68.43,  70.24) 09/26/2018   19:14:29  ( -68.42,  70.24)    1.81                54
 09/26/2018   20:04:19   (  68.31,-122.29) 09/26/2018   20:03:56  (  68.31,-122.25)    1.80                23
 09/26/2018   20:54:47   ( -67.47,  46.07) 09/26/2018   20:53:38  ( -67.53,  44.48)   68.01                69
 09/29/2018   10:40:06   (  69.41,  17.35) 09/29/2018   10:41:13  (  69.30,  19.60)   88.88                67
 09/29/2018   11:30:30   ( -68.36,-173.89) 09/29/2018   11:30:58  ( -68.36,-173.95)    2.30                28
 09/29/2018   12:21:14   (  68.24,  -6.43) 09/29/2018   12:20:25  (  68.24,  -6.44)    0.87                49
 10/02/2018   02:56:45   (  68.49, 134.39) 10/02/2018   02:57:56  (  68.46, 134.42)    2.78                71
 10/02/2018   03:47:26   ( -68.34, -58.10) 10/02/2018   03:47:26  ( -68.36, -58.07)    2.76                 0
 10/02/2018   04:38:08   (  68.11, 109.50) 10/02/2018   04:36:55  (  68.13, 109.30)    8.40                73
 10/04/2018   19:13:39   (  68.42,-109.75) 10/04/2018   19:14:24  (  68.41,-109.76)    0.97                45
 10/04/2018   20:04:21   ( -68.33,  57.69) 10/04/2018   20:03:54  ( -68.31,  57.75)    2.85                27