Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 12 8.  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)
 12/08/2018   14:41:49   ( -70.13, 136.01) 12/08/2018   14:41:17  ( -70.12, 136.00)    0.37                32
 12/08/2018   15:31:16   (  70.02, -56.50) 12/08/2018   15:32:01  (  70.01, -56.52)    1.44                45
 12/11/2018   06:08:46   (  70.32,  84.53) 12/11/2018   06:07:33  (  70.37,  84.06)   18.81                73
 12/11/2018   06:58:18   ( -70.10,-108.15) 12/11/2018   06:58:11  ( -70.07,-108.15)    3.38                 7
 12/11/2018   07:47:46   (  69.94,  59.27) 12/11/2018   07:48:55  (  69.96,  59.33)    3.42                69
 12/13/2018   22:25:16   (  70.18,-159.79) 12/13/2018   22:24:23  (  70.17,-159.85)    2.59                53
 12/13/2018   23:14:47   ( -70.02,   7.62) 12/13/2018   23:15:04  ( -70.02,   7.69)    2.85                17
 12/14/2018   00:04:28   (  69.13, 174.06) 12/14/2018   00:05:34  (  69.17, 176.24)   86.34                66
 12/16/2018   14:41:45   (  70.14, -43.95) 12/16/2018   14:41:17  (  70.13, -44.02)    3.29                28
 12/16/2018   15:31:16   ( -69.99, 123.46) 12/16/2018   15:31:58  ( -69.97, 123.54)    3.52                42
 12/19/2018   06:08:44   ( -70.39, -95.36) 12/19/2018   06:07:32  ( -70.44, -96.05)   26.62                72
 12/19/2018   06:58:15   (  70.06,  71.80) 12/19/2018   06:58:11  (  70.08,  71.82)    3.01                 4
 12/19/2018   07:47:45   ( -69.96,-120.70) 12/19/2018   07:48:53  ( -69.98,-120.70)    2.30                68
 12/21/2018   22:25:17   ( -70.14,  20.16) 12/21/2018   22:24:21  ( -70.14,  20.19)    1.35                56
 12/21/2018   23:14:44   (  70.02,-172.36) 12/21/2018   23:15:05  (  70.04,-172.35)    2.50                21