Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 1 21.  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)
 01/22/2018   14:41:54   ( -70.14, 135.99) 01/22/2018   14:40:51  ( -70.12, 136.05)    3.22                63
 01/22/2018   15:31:21   (  70.04, -56.51) 01/22/2018   15:31:36  (  70.05, -56.54)    1.71                15
 01/22/2018   16:20:59   ( -69.48, 110.36) 01/22/2018   16:22:09  ( -69.49, 111.60)   48.57                70
 01/25/2018   06:58:22   ( -70.11,-108.17) 01/25/2018   06:57:44  ( -70.10,-108.14)    1.87                38
 01/25/2018   07:47:49   (  70.01,  59.33) 01/25/2018   07:48:28  (  69.98,  59.35)    3.34                39
 01/27/2018   22:25:14   (  70.51,-159.33) 01/27/2018   22:24:03  (  70.58,-160.45)   41.95                71
 01/27/2018   23:14:50   ( -70.07,   7.66) 01/27/2018   23:14:37  ( -70.08,   7.67)    0.39                13
 01/28/2018   00:04:17   (  69.97, 175.15) 01/28/2018   00:05:21  (  69.96, 175.15)    0.84                64
 01/30/2018   14:41:47   (  70.14, -43.99) 01/30/2018   14:40:47  (  70.15, -43.98)    0.94                60
 01/30/2018   15:31:17   ( -70.03, 123.49) 01/30/2018   15:31:29  ( -70.06, 123.47)    3.18                12
 01/30/2018   16:20:54   (  69.37, -69.78) 01/30/2018   16:22:02  (  69.36, -68.19)   62.10                68
 02/02/2018   06:58:15   (  70.09,  71.82) 02/02/2018   06:57:39  (  70.08,  71.89)    2.98                36
 02/02/2018   07:47:45   ( -69.98,-120.70) 02/02/2018   07:48:21  ( -69.99,-120.65)    1.92                36