Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 9 15.  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)
 09/16/2017   14:42:03   ( -70.11, 136.00) 09/16/2017   14:41:18  ( -70.12, 136.02)    1.19                45
 09/16/2017   15:31:30   (  70.01, -56.49) 09/16/2017   15:32:02  (  70.00, -56.48)    1.60                32
 09/19/2017   06:08:53   (  70.80,  85.27) 09/19/2017   06:07:45  (  70.84,  83.32)   71.35                68
 09/19/2017   06:58:34   ( -70.09,-108.15) 09/19/2017   06:58:14  ( -70.07,-108.14)    1.94                20
 09/19/2017   07:48:01   (  69.99,  59.35) 09/19/2017   07:48:59  (  70.00,  59.28)    3.40                58
 09/21/2017   22:25:34   (  70.17,-159.80) 09/21/2017   22:24:28  (  70.17,-159.83)    1.36                66
 09/21/2017   23:15:04   ( -70.06,   7.68) 09/21/2017   23:15:10  ( -70.08,   7.62)    3.13                 6
 09/22/2017   00:04:37   (  69.62, 174.72) 09/22/2017   00:05:47  (  69.59, 175.66)   36.69                70
 09/24/2017   14:42:05   (  70.13, -43.97) 09/24/2017   14:41:24  (  70.13, -44.00)    1.19                41
 09/24/2017   15:31:35   ( -70.03, 123.51) 09/24/2017   15:32:06  ( -70.04, 123.45)    2.40                31
 09/27/2017   06:08:57   ( -70.86, -94.67) 09/27/2017   06:07:49  ( -70.88, -96.75)   76.19                68
 09/27/2017   06:58:36   (  70.09,  71.84) 09/27/2017   06:58:20  (  70.09,  71.83)    0.78                16
 09/27/2017   07:48:06   ( -69.99,-120.67) 09/27/2017   07:49:02  ( -70.00,-120.72)    2.06                56