Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 1 17.  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)
 01/19/2018   22:25:19   ( -70.60,  20.78) 01/19/2018   22:24:09  ( -70.67,  19.40)   51.49                70
 01/19/2018   23:14:54   (  70.06,-172.36) 01/19/2018   23:14:44  (  70.08,-172.36)    1.90                10
 01/20/2018   00:04:23   ( -69.95,  -4.89) 01/20/2018   00:05:24  ( -69.94,  -4.83)    2.07                61
 01/22/2018   14:41:54   ( -70.14, 135.99) 01/22/2018   14:40:51  ( -70.12, 136.05)    3.34                63
 01/22/2018   15:31:21   (  70.04, -56.51) 01/22/2018   15:31:36  (  70.05, -56.55)    2.40                15
 01/22/2018   16:20:59   ( -69.49, 110.36) 01/22/2018   16:22:09  ( -69.49, 111.61)   48.37                70
 01/25/2018   06:58:22   ( -70.12,-108.16) 01/25/2018   06:57:44  ( -70.09,-108.14)    2.55                38
 01/25/2018   07:47:49   (  70.01,  59.33) 01/25/2018   07:48:28  (  69.98,  59.35)    3.17                39
 01/27/2018   22:25:14   (  70.52,-159.32) 01/27/2018   22:24:03  (  70.58,-160.44)   42.07                71
 01/27/2018   23:14:50   ( -70.08,   7.68) 01/27/2018   23:14:37  ( -70.07,   7.68)    1.41                13
 01/28/2018   00:04:17   (  69.97, 175.16) 01/28/2018   00:05:21  (  69.96, 175.16)    1.67                64
 01/30/2018   14:41:48   (  70.15, -43.98) 01/30/2018   14:40:48  (  70.14, -43.97)    1.12                60
 01/30/2018   15:31:18   ( -70.05, 123.51) 01/30/2018   15:31:30  ( -70.05, 123.48)    0.97                12
 01/30/2018   16:20:54   (  69.38, -69.76) 01/30/2018   16:22:02  (  69.35, -68.18)   61.87                68