Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2015 6 16.  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)
 06/18/2015   02:50:09   ( -71.27, -44.53) 06/18/2015   02:49:01  ( -71.34, -46.66)   76.08                68
 06/18/2015   03:39:47   (  70.57, 122.03) 06/18/2015   03:39:32  (  70.55, 121.98)    3.35                15
 06/18/2015   04:29:17   ( -70.46, -70.51) 06/18/2015   04:30:14  ( -70.46, -70.57)    2.29                57
 06/20/2015   19:06:50   ( -70.60,  70.31) 06/20/2015   19:05:40  ( -70.62,  70.33)    1.74                70
 06/20/2015   19:56:17   (  70.50,-122.20) 06/20/2015   19:56:24  (  70.50,-122.18)    0.96                 7
 06/20/2015   20:45:50   ( -70.23,  45.03) 06/20/2015   20:47:02  ( -70.21,  45.60)   21.58                72
 06/23/2015   11:23:20   ( -70.57,-173.86) 06/23/2015   11:22:33  ( -70.58,-173.84)    1.02                47
 06/23/2015   12:12:47   (  70.46,  -6.37) 06/23/2015   12:13:17  (  70.47,  -6.36)    0.96                30
 06/26/2015   02:50:06   (  71.38, 135.67) 06/26/2015   02:48:59  (  71.42, 133.19)   88.00                67
 06/26/2015   03:39:50   ( -70.52, -58.05) 06/26/2015   03:39:26  ( -70.54, -58.01)    2.89                24
 06/26/2015   04:29:16   (  70.46, 109.51) 06/26/2015   04:30:10  (  70.44, 109.46)    3.24                54
 06/28/2015   19:06:49   (  70.60,-109.67) 06/28/2015   19:05:37  (  70.61,-109.68)    1.28                72
 06/28/2015   19:56:19   ( -70.50,  57.81) 06/28/2015   19:56:19  ( -70.51,  57.80)    0.97                 0
 06/28/2015   20:45:48   (  70.28,-134.87) 06/28/2015   20:47:00  (  70.25,-134.48)   14.90                72