Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 12 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)
 12/23/2017   10:39:33   ( -68.39,-161.29) 12/23/2017   10:40:27  ( -68.39,-161.25)    1.77                54
 12/23/2017   11:30:16   (  68.22,   6.24) 12/23/2017   11:29:55  (  68.22,   6.20)    1.53                21
 12/23/2017   12:20:45   ( -67.43, 174.53) 12/23/2017   12:19:36  ( -67.50, 173.00)   65.73                69
 12/26/2017   02:56:26   ( -68.34, -45.45) 12/26/2017   02:56:58  ( -68.31, -45.46)    2.84                32
 12/26/2017   03:47:10   (  68.22, 122.00) 12/26/2017   03:46:25  (  68.20, 122.06)    3.41                45
 12/28/2017   18:22:42   (  68.71, -97.48) 12/28/2017   18:23:53  (  68.61, -96.84)   27.97                71
 12/28/2017   19:13:18   ( -68.29,  70.38) 12/28/2017   19:13:27  ( -68.29,  70.39)    0.59                 9
 12/28/2017   20:04:02   (  68.18,-122.17) 12/28/2017   20:02:54  (  68.17,-122.10)    2.86                68
 12/31/2017   10:39:29   (  68.34,  18.77) 12/31/2017   10:40:27  (  68.35,  18.72)    2.35                58
 12/31/2017   11:30:11   ( -68.25,-173.79) 12/31/2017   11:29:57  ( -68.25,-173.77)    0.98                14
 12/31/2017   12:20:44   (  67.54,  -5.60) 12/31/2017   12:19:34  (  67.57,  -6.91)   55.54                70
 01/03/2018   02:56:22   (  68.30, 134.60) 01/03/2018   02:56:57  (  68.31, 134.55)    2.12                35
 01/03/2018   03:47:04   ( -68.20, -57.96) 01/03/2018   03:46:27  ( -68.21, -57.94)    1.13                37