Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 3 25.  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)
 03/27/2018   14:41:24   ( -70.16, 135.98) 03/27/2018   14:40:35  ( -70.14, 136.05)    2.92                49
 03/27/2018   15:30:51   (  70.05, -56.52) 03/27/2018   15:31:20  (  70.08, -56.54)    3.10                29
 03/30/2018   06:08:11   (  70.86,  85.27) 03/30/2018   06:07:03  (  70.96,  83.18)   76.88                68
 03/30/2018   06:57:52   ( -70.15,-108.15) 03/30/2018   06:57:31  ( -70.13,-108.17)    1.97                21
 03/30/2018   07:47:19   (  70.04,  59.34) 03/30/2018   07:48:15  (  70.02,  59.31)    2.72                56
 04/01/2018   22:24:51   (  70.19,-159.85) 04/01/2018   22:23:44  (  70.17,-159.77)    3.43                67
 04/01/2018   23:14:20   ( -70.08,   7.63) 04/01/2018   23:14:25  ( -70.07,   7.70)    2.66                 5
 04/02/2018   00:03:53   (  69.64, 174.67) 04/02/2018   00:05:03  (  69.65, 175.64)   37.70                70
 04/04/2018   14:41:18   (  70.17, -44.00) 04/04/2018   14:40:39  (  70.17, -44.00)    0.30                39
 04/04/2018   15:30:48   ( -70.06, 123.49) 04/04/2018   15:31:21  ( -70.07, 123.47)    0.59                33
 04/07/2018   06:08:11   ( -70.70, -94.99) 04/07/2018   06:07:01  ( -70.79, -96.54)   57.83                70
 04/07/2018   06:57:46   (  70.14,  71.85) 04/07/2018   06:57:34  (  70.12,  71.84)    2.95                12
 04/07/2018   07:47:17   ( -69.99,-120.74) 04/07/2018   07:48:16  ( -70.01,-120.68)    3.57                59