Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 5 20.  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   ( -70.42, 148.68) 05/22/2018   13:50:06  ( -70.44, 148.25)   16.30                73
 05/22/2018   14:40:49   (  70.15, -44.06) 05/22/2018   14:40:47  (  70.16, -44.02)    2.35                 2
 05/22/2018   15:30:18   ( -70.09, 123.49) 05/22/2018   15:31:29  ( -70.08, 123.44)    2.40                71
 05/25/2018   06:07:49   ( -70.25, -95.68) 05/25/2018   06:06:58  ( -70.27, -95.71)    2.28                51
 05/25/2018   06:57:16   (  70.14,  71.81) 05/25/2018   06:57:42  (  70.15,  71.78)    1.68                26
 05/25/2018   07:47:02   ( -69.15,-121.90) 05/25/2018   07:48:07  ( -69.16,-119.45)   97.00                65
 05/27/2018   21:34:33   (  71.06,-146.22) 05/27/2018   21:33:26  (  71.13,-148.67)   88.87                67
 05/27/2018   22:24:16   ( -70.19,  20.11) 05/27/2018   22:23:51  ( -70.20,  20.16)    2.78                25
 05/27/2018   23:13:43   (  70.08,-172.40) 05/27/2018   23:14:35  (  70.09,-172.35)    2.45                52
 05/30/2018   13:51:13   (  70.28, -31.51) 05/30/2018   13:50:04  (  70.29, -31.51)    0.85                69
 05/30/2018   14:40:43   ( -70.17, 135.97) 05/30/2018   14:40:46  ( -70.19, 135.95)    2.25                 3
 05/30/2018   15:30:14   (  69.84, -56.85) 05/30/2018   15:31:25  (  69.82, -56.17)   26.40                71
 06/02/2018   06:07:40   (  70.26,  84.34) 06/02/2018   06:06:59  (  70.28,  84.27)    3.55                41
 06/02/2018   06:57:10   ( -70.16,-108.17) 06/02/2018   06:57:40  ( -70.13,-108.18)    2.82                30