Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 6 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)
 06/25/2017   22:25:02   ( -70.68,  20.97) 06/25/2017   22:23:52  ( -70.71,  19.43)   56.81                70
 06/25/2017   23:14:38   (  70.09,-172.25) 06/25/2017   23:14:27  (  70.11,-172.31)    2.77                11
 06/26/2017   00:04:08   ( -69.98,  -4.78) 06/26/2017   00:05:08  ( -69.98,  -4.80)    0.78                60
 06/28/2017   14:41:42   ( -70.12, 136.03) 06/28/2017   14:40:36  ( -70.14, 136.10)    3.39                66
 06/28/2017   15:31:09   (  70.02, -56.47) 06/28/2017   15:31:20  (  70.01, -56.40)    2.81                11
 06/28/2017   16:20:45   ( -69.58, 110.55) 06/28/2017   16:21:55  ( -69.57, 111.59)   40.21                70
 07/01/2017   06:58:11   ( -70.10,-108.11) 07/01/2017   06:57:29  ( -70.10,-108.06)    2.13                42
 07/01/2017   07:47:38   (  70.00,  59.38) 07/01/2017   07:48:13  (  69.98,  59.43)    3.16                35
 07/03/2017   22:25:02   (  70.68,-159.02) 07/03/2017   22:23:52  (  70.73,-160.60)   58.36                70
 07/03/2017   23:14:41   ( -70.08,   7.74) 07/03/2017   23:14:23  ( -70.06,   7.78)    3.07                18
 07/04/2017   00:04:08   (  69.97, 175.23) 07/04/2017   00:05:08  (  69.99, 175.18)    2.91                60
 07/06/2017   14:41:41   (  70.16, -43.90) 07/06/2017   14:40:36  (  70.17, -43.93)    1.28                65
 07/06/2017   15:31:11   ( -70.06, 123.58) 07/06/2017   15:31:18  ( -70.07, 123.53)    2.68                 7
 07/06/2017   16:20:45   (  69.56, -69.46) 07/06/2017   16:21:55  (  69.59, -68.44)   39.82                70
 07/09/2017   06:58:11   (  70.13,  71.93) 07/09/2017   06:57:30  (  70.13,  71.89)    1.65                41
 07/09/2017   07:47:41   ( -70.03,-120.58) 07/09/2017   07:48:12  ( -70.04,-120.64)    2.52                31