Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 10 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)
 10/15/2017   22:25:43   ( -70.21,  20.23) 10/15/2017   22:24:33  ( -70.20,  20.17)    2.39                70
 10/15/2017   23:15:11   (  70.06,-172.35) 10/15/2017   23:15:17  (  70.07,-172.33)    1.70                 6
 10/16/2017   00:04:43   ( -69.83,  -5.03) 10/16/2017   00:05:55  ( -69.79,  -4.58)   18.05                72
 10/18/2017   14:42:13   ( -70.13, 135.98) 10/18/2017   14:41:26  ( -70.14, 136.03)    2.30                47
 10/18/2017   15:31:40   (  70.02, -56.52) 10/18/2017   15:32:10  (  70.01, -56.47)    2.59                30
 10/21/2017   06:09:01   (  70.86,  85.31) 10/21/2017   06:07:53  (  70.94,  83.19)   77.95                68
 10/21/2017   06:58:42   ( -70.14,-108.11) 10/21/2017   06:58:21  ( -70.13,-108.19)    3.46                21
 10/21/2017   07:48:10   (  69.99,  59.31) 10/21/2017   07:49:05  (  70.00,  59.31)    1.84                55
 10/23/2017   22:25:43   (  70.16,-159.85) 10/23/2017   22:24:33  (  70.15,-159.77)    2.94                70
 10/23/2017   23:15:13   ( -70.05,   7.63) 10/23/2017   23:15:15  ( -70.07,   7.67)    2.46                 2
 10/24/2017   00:04:44   (  69.72, 174.82) 10/24/2017   00:05:55  (  69.73, 175.48)   25.59                71
 10/26/2017   14:42:12   (  70.16, -43.96) 10/26/2017   14:41:28  (  70.15, -44.00)    2.16                44
 10/26/2017   15:31:42   ( -70.06, 123.52) 10/26/2017   15:32:10  ( -70.06, 123.45)    2.80                28
 10/29/2017   06:09:00   ( -70.98, -94.50) 10/29/2017   06:07:53  ( -71.04, -96.99)   90.45                67
 10/29/2017   06:58:41   (  70.10,  71.84) 10/29/2017   06:58:21  (  70.09,  71.84)    1.23                20
 10/29/2017   07:48:11   ( -70.00,-120.67) 10/29/2017   07:49:03  ( -70.00,-120.70)    1.05                52