Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 1 14.  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)
 01/14/2018   15:31:27   ( -70.04, 123.49) 01/14/2018   15:31:40  ( -70.04, 123.46)    0.92                13
 01/14/2018   16:21:05   (  69.34, -69.84) 01/14/2018   16:22:13  (  69.34, -68.20)   64.24                68
 01/17/2018   06:58:26   (  70.09,  71.80) 01/17/2018   06:57:51  (  70.10,  71.83)    2.02                35
 01/17/2018   07:47:55   ( -70.03,-120.65) 01/17/2018   07:48:33  ( -70.01,-120.72)    2.83                38
 01/19/2018   22:25:18   ( -70.60,  20.79) 01/19/2018   22:24:08  ( -70.66,  19.42)   51.12                70
 01/19/2018   23:14:53   (  70.06,-172.35) 01/19/2018   23:14:43  (  70.08,-172.35)    1.38                10
 01/20/2018   00:04:23   ( -69.95,  -4.88) 01/20/2018   00:05:24  ( -69.93,  -4.82)    2.90                61
 01/22/2018   14:41:54   ( -70.14, 136.00) 01/22/2018   14:40:52  ( -70.16, 135.98)    2.59                62
 01/22/2018   15:31:21   (  70.03, -56.51) 01/22/2018   15:31:36  (  70.05, -56.54)    2.27                15
 01/22/2018   16:20:59   ( -69.48, 110.37) 01/22/2018   16:22:09  ( -69.49, 111.62)   48.70                70
 01/25/2018   06:58:22   ( -70.11,-108.17) 01/25/2018   06:57:44  ( -70.09,-108.13)    2.78                38
 01/25/2018   07:47:49   (  70.00,  59.32) 01/25/2018   07:48:28  (  69.98,  59.35)    2.64                39
 01/27/2018   22:25:14   (  70.50,-159.34) 01/27/2018   22:24:03  (  70.58,-160.44)   41.67                71
 01/27/2018   23:14:50   ( -70.07,   7.66) 01/27/2018   23:14:37  ( -70.07,   7.68)    0.86                13
 01/28/2018   00:04:17   (  69.96, 175.15) 01/28/2018   00:05:21  (  69.96, 175.16)    0.39                64