Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 7 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)
 07/27/2017   22:25:07   ( -70.95,  21.38) 07/27/2017   22:24:00  ( -71.03,  18.91)   89.97                67
 07/27/2017   23:14:48   (  70.08,-172.26) 07/27/2017   23:14:28  (  70.08,-172.25)    0.68                20
 07/28/2017   00:04:18   ( -69.97,  -4.79) 07/28/2017   00:05:10  ( -69.98,  -4.79)    1.30                52
 07/30/2017   14:41:52   ( -70.15, 136.06) 07/30/2017   14:40:41  ( -70.15, 136.09)    0.97                71
 07/30/2017   15:31:19   (  70.04, -56.44) 07/30/2017   15:31:25  (  70.04, -56.44)    0.07                 6
 07/30/2017   16:20:52   ( -69.77, 110.81) 07/30/2017   16:22:04  ( -69.79, 111.27)   17.59                72
 08/02/2017   06:58:23   ( -70.11,-108.11) 08/02/2017   06:57:38  ( -70.12,-108.10)    1.10                45
 08/02/2017   07:47:50   (  70.00,  59.38) 08/02/2017   07:48:22  (  70.01,  59.37)    1.26                32
 08/04/2017   22:25:13   (  70.77,-158.89) 08/04/2017   22:24:05  (  70.82,-160.77)   69.05                68
 08/04/2017   23:14:54   ( -70.07,   7.70) 08/04/2017   23:14:35  ( -70.08,   7.72)    1.94                19
 08/05/2017   00:04:21   (  69.95, 175.19) 08/05/2017   00:05:19  (  69.98, 175.18)    3.09                58
 08/07/2017   14:41:53   (  70.17, -43.90) 08/07/2017   14:40:49  (  70.16, -43.96)    2.42                64
 08/07/2017   15:31:23   ( -70.07, 123.59) 08/07/2017   15:31:31  ( -70.05, 123.53)    3.50                 8
 08/07/2017   16:20:57   (  69.57, -69.46) 08/07/2017   16:22:07  (  69.53, -68.38)   42.07                70
 08/10/2017   06:58:24   (  70.12,  71.90) 08/10/2017   06:57:46  (  70.14,  71.85)    2.76                38
 08/10/2017   07:47:54   ( -70.02,-120.60) 08/10/2017   07:48:28  ( -70.02,-120.66)    2.29                34