Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2015 8 18.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/18/2015   12:13:13   ( -70.50, 173.67) 08/18/2015   12:12:30  ( -70.50, 173.61)    2.33                43
 08/18/2015   13:02:41   (  70.35, -18.91) 08/18/2015   13:03:13  (  70.34, -18.83)    3.38                32
 08/21/2015   03:40:01   (  71.28, 123.13) 08/21/2015   03:38:54  (  71.30, 120.73)   85.48                67
 08/21/2015   04:29:44   ( -70.46, -70.51) 08/21/2015   04:29:22  ( -70.48, -70.58)    3.45                22
 08/21/2015   05:19:12   (  70.30,  96.91) 08/21/2015   05:20:05  (  70.31,  96.98)    3.12                53
 08/23/2015   19:56:45   (  70.52,-122.18) 08/23/2015   19:55:32  (  70.55,-122.24)    4.54                73
 08/23/2015   20:46:15   ( -70.41,  45.29) 08/23/2015   20:46:13  ( -70.41,  45.30)    0.38                 2
 08/23/2015   21:35:43   (  70.25,-147.29) 08/23/2015   21:36:56  (  70.24,-147.13)    5.99                73
 08/26/2015   12:13:14   (  70.51,  -6.31) 08/26/2015   12:12:22  (  70.48,  -6.36)    3.22                52
 08/26/2015   13:02:44   ( -70.40, 161.17) 08/26/2015   13:03:04  ( -70.39, 161.10)    2.69                20
 08/26/2015   13:52:26   (  69.47, -32.50) 08/26/2015   13:53:32  (  69.43, -30.15)   91.70                66
 08/29/2015   04:29:45   (  70.43, 109.46) 08/29/2015   04:29:13  (  70.42, 109.52)    2.60                32
 08/29/2015   05:19:15   ( -70.33, -83.06) 08/29/2015   05:19:55  ( -70.32, -83.02)    1.54                40
 08/31/2015   19:56:40   ( -70.95,  58.49) 08/31/2015   19:55:30  ( -70.98,  57.06)   51.86                70
 08/31/2015   20:46:15   (  70.40,-134.70) 08/31/2015   20:46:05  (  70.41,-134.69)    0.65                10
 08/31/2015   21:35:45   ( -70.30,  32.79) 08/31/2015   21:36:47  ( -70.31,  32.77)    1.26                62