Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2015 3 25.  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)
 03/27/2015   10:34:01   ( -70.76,-161.35) 03/27/2015   10:33:00  ( -70.77,-161.41)    2.44                61
 03/27/2015   11:23:28   (  70.66,   6.14) 03/27/2015   11:23:44  (  70.67,   6.07)    3.04                16
 03/27/2015   12:13:07   ( -70.05, 172.89) 03/27/2015   12:14:16  ( -70.05, 174.36)   55.91                69
 03/30/2015   02:50:29   ( -70.71, -45.55) 03/30/2015   02:49:51  ( -70.73, -45.57)    2.99                38
 03/30/2015   03:39:56   (  70.61, 121.94) 03/30/2015   03:40:34  (  70.58, 121.98)    3.11                38
 04/01/2015   18:17:19   (  71.20, -96.54) 04/01/2015   18:16:09  (  71.28, -98.03)   53.80                70
 04/01/2015   19:06:56   ( -70.70,  70.32) 04/01/2015   19:06:42  ( -70.70,  70.25)    2.54                14
 04/01/2015   19:56:24   (  70.54,-122.27) 04/01/2015   19:57:25  (  70.55,-122.20)    2.86                61
 04/04/2015   10:33:53   (  70.74,  18.63) 04/04/2015   10:32:49  (  70.73,  18.66)    1.69                64
 04/04/2015   11:23:23   ( -70.63,-173.90) 04/04/2015   11:23:31  ( -70.63,-173.85)    2.05                 8
 04/04/2015   12:12:58   (  70.09,  -7.05) 04/04/2015   12:14:07  (  70.11,  -5.73)   50.15                69
 04/07/2015   02:50:20   (  70.71, 134.47) 04/07/2015   02:49:40  (  70.72, 134.46)    0.39                40
 04/07/2015   03:39:50   ( -70.60, -58.06) 04/07/2015   03:40:22  ( -70.61, -58.05)    1.00                32