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   ( -70.51, 173.68) 08/18/2015   12:12:30  ( -70.49, 173.62)    2.82                43
 08/18/2015   13:02:41   (  70.36, -18.90) 08/18/2015   13:03:14  (  70.38, -18.90)    2.95                33
 08/21/2015   03:40:02   (  71.23, 123.05) 08/21/2015   03:38:54  (  71.29, 120.74)   82.73                68
 08/21/2015   04:29:44   ( -70.47, -70.50) 08/21/2015   04:29:22  ( -70.47, -70.57)    2.67                22
 08/21/2015   05:19:12   (  70.31,  96.92) 08/21/2015   05:20:05  (  70.31,  96.99)    2.83                53
 08/23/2015   19:56:45   (  70.52,-122.17) 08/23/2015   19:55:32  (  70.54,-122.23)    3.22                73
 08/23/2015   20:46:14   ( -70.42,  45.31) 08/23/2015   20:46:12  ( -70.40,  45.32)    2.09                 2
 08/23/2015   21:35:42   (  70.26,-147.28) 08/23/2015   21:36:55  (  70.24,-147.12)    6.37                73
 08/26/2015   12:13:15   (  70.46,  -6.38) 08/26/2015   12:12:22  (  70.47,  -6.35)    2.07                53
 08/26/2015   13:02:45   ( -70.35, 161.10) 08/26/2015   13:03:04  ( -70.38, 161.12)    2.92                19
 08/26/2015   13:52:27   (  69.42, -32.57) 08/26/2015   13:53:32  (  69.42, -30.14)   94.73                65
 08/29/2015   04:29:45   (  70.44, 109.47) 08/29/2015   04:29:14  (  70.46, 109.45)    2.44                31
 08/29/2015   05:19:15   ( -70.34, -83.05) 08/29/2015   05:19:55  ( -70.31, -83.00)    3.28                40
 08/31/2015   19:56:41   ( -70.91,  58.41) 08/31/2015   19:55:30  ( -70.97,  57.08)   48.92                71
 08/31/2015   20:46:15   (  70.41,-134.69) 08/31/2015   20:46:05  (  70.40,-134.68)    1.65                10
 08/31/2015   21:35:45   ( -70.31,  32.80) 08/31/2015   21:36:47  ( -70.30,  32.79)    1.26                62