Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 5 21.  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)
 05/22/2018   13:51:19   ( -70.40, 148.66) 05/22/2018   13:50:06  ( -70.45, 148.23)   17.10                73
 05/22/2018   14:40:48   (  70.19, -44.00) 05/22/2018   14:40:47  (  70.18, -44.04)    2.05                 1
 05/22/2018   15:30:18   ( -70.07, 123.47) 05/22/2018   15:31:29  ( -70.09, 123.42)    2.53                71
 05/25/2018   06:07:49   ( -70.23, -95.70) 05/25/2018   06:06:57  ( -70.23, -95.65)    2.14                52
 05/25/2018   06:57:16   (  70.13,  71.79) 05/25/2018   06:57:41  (  70.11,  71.84)    2.55                25
 05/25/2018   07:47:01   ( -69.19,-121.85) 05/25/2018   07:48:07  ( -69.18,-119.47)   94.04                66
 05/27/2018   21:34:32   (  71.10,-146.15) 05/27/2018   21:33:26  (  71.15,-148.69)   91.60                66
 05/27/2018   22:24:16   ( -70.23,  20.16) 05/27/2018   22:23:52  ( -70.22,  20.14)    1.36                24
 05/27/2018   23:13:43   (  70.12,-172.35) 05/27/2018   23:14:36  (  70.10,-172.37)    1.97                53
 05/30/2018   13:51:13   (  70.27, -31.53) 05/30/2018   13:50:03  (  70.25, -31.45)    3.73                70
 05/30/2018   14:40:43   ( -70.16, 135.95) 05/30/2018   14:40:45  ( -70.15, 136.01)    2.39                 2
 05/30/2018   15:30:14   (  69.83, -56.87) 05/30/2018   15:31:25  (  69.83, -56.19)   26.30                71
 06/02/2018   06:07:40   (  70.25,  84.32) 06/02/2018   06:06:58  (  70.24,  84.33)    0.82                42
 06/02/2018   06:57:10   ( -70.14,-108.19) 06/02/2018   06:57:40  ( -70.15,-108.20)    0.54                30