Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2015 8 20.  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)
 08/21/2015   03:40:01   (  71.26, 123.09) 08/21/2015   03:38:54  (  71.33, 120.69)   86.04                67
 08/21/2015   04:29:44   ( -70.43, -70.55) 08/21/2015   04:29:21  ( -70.45, -70.55)    2.26                23
 08/21/2015   05:19:11   (  70.34,  96.95) 08/21/2015   05:20:05  (  70.34,  96.94)    0.70                54
 08/23/2015   19:56:44   (  70.55,-122.12) 08/23/2015   19:55:32  (  70.58,-122.29)    6.65                72
 08/23/2015   20:46:15   ( -70.39,  45.27) 08/23/2015   20:46:12  ( -70.38,  45.34)    2.78                 3
 08/23/2015   21:35:43   (  70.23,-147.32) 08/23/2015   21:36:55  (  70.22,-147.10)    8.52                72
 08/26/2015   12:13:15   (  70.50,  -6.33) 08/26/2015   12:12:23  (  70.51,  -6.41)    3.53                52
 08/26/2015   13:02:45   ( -70.39, 161.15) 08/26/2015   13:03:04  ( -70.37, 161.13)    2.35                19
 08/26/2015   13:52:27   (  69.46, -32.51) 08/26/2015   13:53:33  (  69.46, -30.20)   90.37                66
 08/29/2015   04:29:46   (  70.44, 109.46) 08/29/2015   04:29:14  (  70.45, 109.46)    1.91                32
 08/29/2015   05:19:16   ( -70.33, -83.06) 08/29/2015   05:19:56  ( -70.36, -83.08)    3.41                40
 08/31/2015   19:56:40   ( -70.97,  58.51) 08/31/2015   19:55:30  ( -71.03,  56.99)   55.29                70
 08/31/2015   20:46:15   (  70.42,-134.68) 08/31/2015   20:46:04  (  70.40,-134.67)    2.68                11
 08/31/2015   21:35:45   ( -70.32,  32.81) 08/31/2015   21:36:46  ( -70.30,  32.79)    1.83                61
 09/03/2015   12:13:18   ( -70.51, 173.69) 09/03/2015   12:12:12  ( -70.50, 173.62)    2.84                66
 09/03/2015   13:02:45   (  70.40, -18.83) 09/03/2015   13:02:56  (  70.40, -18.90)    2.57                11
 09/03/2015   13:52:21   ( -69.97, 148.19) 09/03/2015   13:53:32  ( -69.99, 149.05)   32.81                71