Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 5 10.  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)
 05/11/2018   22:24:28   ( -70.21,  20.15) 05/11/2018   22:23:51  ( -70.22,  20.13)    0.90                37
 05/11/2018   23:13:55   (  70.11,-172.35) 05/11/2018   23:14:35  (  70.11,-172.39)    1.61                40
 05/14/2018   13:51:21   (  70.56, -31.10) 05/14/2018   13:50:10  (  70.61, -32.03)   35.01                71
 05/14/2018   14:40:56   ( -70.18, 135.97) 05/14/2018   14:40:46  ( -70.20, 135.94)    2.53                10
 05/14/2018   15:30:23   (  70.07, -56.53) 05/14/2018   15:31:30  (  70.09, -56.59)    2.75                67
 05/17/2018   06:07:54   (  70.24,  84.31) 05/17/2018   06:06:58  (  70.22,  84.35)    2.95                56
 05/17/2018   06:57:24   ( -70.13,-108.21) 05/17/2018   06:57:40  ( -70.12,-108.18)    1.89                16
 05/17/2018   07:47:04   (  69.31,  58.31) 05/17/2018   07:48:11  (  69.32,  60.31)   78.82                67
 05/19/2018   22:24:22   (  70.19,-159.88) 05/19/2018   22:23:53  (  70.20,-159.84)    1.50                29
 05/19/2018   23:13:52   ( -70.09,   7.61) 05/19/2018   23:14:35  ( -70.10,   7.63)    1.66                43
 05/22/2018   13:51:19   ( -70.42, 148.69) 05/22/2018   13:50:06  ( -70.45, 148.23)   17.03                73
 05/22/2018   14:40:48   (  70.20, -43.99) 05/22/2018   14:40:47  (  70.19, -44.05)    2.36                 1
 05/22/2018   15:30:18   ( -70.09, 123.49) 05/22/2018   15:31:29  ( -70.08, 123.43)    2.78                71