Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 12 24.  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)
 12/24/2017   06:58:36   ( -70.11,-108.18) 12/24/2017   06:58:03  ( -70.09,-108.18)    2.05                33
 12/24/2017   07:48:03   (  70.01,  59.32) 12/24/2017   07:48:47  (  69.98,  59.29)    3.30                44
 12/26/2017   22:25:32   (  70.36,-159.58) 12/26/2017   22:24:20  (  70.46,-160.30)   29.19                72
 12/26/2017   23:15:05   ( -70.08,   7.66) 12/26/2017   23:14:57  ( -70.10,   7.58)    3.37                 8
 12/27/2017   00:04:33   (  69.92, 175.08) 12/27/2017   00:05:40  (  69.94, 175.13)    2.69                67
 12/29/2017   14:42:04   (  70.16, -43.99) 12/29/2017   14:41:08  (  70.15, -44.05)    2.17                56
 12/29/2017   15:31:33   ( -70.05, 123.49) 12/29/2017   15:31:49  ( -70.05, 123.43)    2.49                16
 12/29/2017   16:21:12   (  69.28, -69.92) 12/29/2017   16:22:20  (  69.26, -68.10)   71.44                68
 01/01/2018   06:58:32   (  70.11,  71.83) 01/01/2018   06:58:00  (  70.11,  71.79)    1.50                32
 01/01/2018   07:48:02   ( -70.01,-120.69) 01/01/2018   07:48:42  ( -70.01,-120.74)    1.93                40
 01/03/2018   22:25:28   ( -70.50,  20.63) 01/03/2018   22:24:17  ( -70.59,  19.50)   43.25                71
 01/03/2018   23:15:01   (  70.06,-172.36) 01/03/2018   23:14:53  (  70.08,-172.38)    1.46                 8
 01/04/2018   00:04:31   ( -69.96,  -4.87) 01/04/2018   00:05:35  ( -69.97,  -4.90)    1.84                64
 01/06/2018   14:42:03   ( -70.12, 135.96) 01/06/2018   14:41:02  ( -70.14, 135.99)    1.92                61
 01/06/2018   15:31:30   (  70.01, -56.55) 01/06/2018   15:31:46  (  70.04, -56.55)    3.31                16
 01/06/2018   16:21:09   ( -69.41, 110.26) 01/06/2018   16:22:18  ( -69.41, 111.70)   56.30                69