Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 12 27.  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)
 12/29/2017   14:42:04   (  70.12, -44.05) 12/29/2017   14:41:07  (  70.14, -44.02)    2.38                57
 12/29/2017   15:31:33   ( -70.06, 123.50) 12/29/2017   15:31:49  ( -70.04, 123.45)    2.93                16
 12/29/2017   16:21:13   (  69.24, -69.97) 12/29/2017   16:22:20  (  69.24, -68.08)   74.59                67
 01/01/2018   06:58:33   (  70.07,  71.77) 01/01/2018   06:58:00  (  70.10,  71.82)    3.36                33
 01/01/2018   07:48:02   ( -70.01,-120.68) 01/01/2018   07:48:42  ( -70.00,-120.71)    2.40                40
 01/03/2018   22:25:28   ( -70.51,  20.64) 01/03/2018   22:24:17  ( -70.58,  19.52)   42.25                71
 01/03/2018   23:15:01   (  70.07,-172.34) 01/03/2018   23:14:53  (  70.06,-172.35)    1.71                 8
 01/04/2018   00:04:31   ( -69.97,  -4.86) 01/04/2018   00:05:35  ( -69.96,  -4.88)    1.05                64
 01/06/2018   14:42:02   ( -70.13, 135.97) 01/06/2018   14:41:01  ( -70.12, 136.01)    1.76                61
 01/06/2018   15:31:29   (  70.02, -56.54) 01/06/2018   15:31:45  (  70.02, -56.52)    1.17                16
 01/06/2018   16:21:08   ( -69.42, 110.27) 01/06/2018   16:22:17  ( -69.39, 111.72)   57.06                69
 01/09/2018   06:58:30   ( -70.12,-108.16) 01/09/2018   06:57:54  ( -70.09,-108.16)    3.30                36
 01/09/2018   07:47:57   (  70.01,  59.33) 01/09/2018   07:48:38  (  69.99,  59.30)    2.07                41