Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 3 11.  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)
 03/11/2018   14:41:31   ( -70.18, 136.03) 03/11/2018   14:40:29  ( -70.17, 136.04)    1.22                62
 03/11/2018   15:30:58   (  70.07, -56.47) 03/11/2018   15:31:14  (  70.09, -56.53)    3.07                16
 03/11/2018   16:20:37   ( -69.46, 110.32) 03/11/2018   16:21:46  ( -69.48, 111.69)   53.37                69
 03/14/2018   06:57:59   ( -70.14,-108.14) 03/14/2018   06:57:25  ( -70.14,-108.15)    0.43                34
 03/14/2018   07:47:26   (  70.04,  59.36) 03/14/2018   07:48:09  (  70.02,  59.34)    2.09                43
 03/16/2018   22:24:54   (  70.32,-159.63) 03/16/2018   22:23:41  (  70.37,-160.05)   16.41                73
 03/16/2018   23:14:26   ( -70.11,   7.69) 03/16/2018   23:14:20  ( -70.12,   7.65)    2.01                 6
 03/17/2018   00:03:53   (  70.00, 175.18) 03/17/2018   00:05:04  (  70.00, 175.14)    1.57                71
 03/19/2018   14:41:24   (  70.17, -43.97) 03/19/2018   14:40:34  (  70.19, -44.01)    2.93                50
 03/19/2018   15:30:54   ( -70.06, 123.51) 03/19/2018   15:31:15  ( -70.05, 123.53)    2.18                21
 03/19/2018   16:20:37   (  69.07, -70.19) 03/19/2018   16:21:42  (  69.03, -67.69)   99.64                65
 03/22/2018   06:57:52   (  70.12,  71.84) 03/22/2018   06:57:29  (  70.13,  71.85)    0.83                23
 03/22/2018   07:47:22   ( -70.02,-120.67) 03/22/2018   07:48:11  ( -70.03,-120.68)    1.08                49
 03/24/2018   22:24:52   ( -70.24,  20.25) 03/24/2018   22:23:41  ( -70.22,  20.17)    3.70                71
 03/24/2018   23:14:20   (  70.07,-172.35) 03/24/2018   23:14:24  (  70.06,-172.28)    2.88                 4
 03/25/2018   00:03:52   ( -69.86,  -5.02) 03/25/2018   00:05:04  ( -69.85,  -4.65)   14.04                72