Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 4 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)
 04/23/2018   06:08:09   ( -70.30, -95.60) 04/23/2018   06:06:56  ( -70.32, -95.80)    8.14                73
 04/23/2018   06:57:37   (  70.14,  71.83) 04/23/2018   06:57:38  (  70.11,  71.84)    3.29                 1
 04/23/2018   07:47:07   ( -70.03,-120.70) 04/23/2018   07:48:20  ( -70.01,-120.69)    1.68                73
 04/25/2018   22:24:38   ( -70.23,  20.18) 04/25/2018   22:23:50  ( -70.23,  20.11)    2.62                48
 04/25/2018   23:14:06   (  70.07,-172.40) 04/25/2018   23:14:33  (  70.08,-172.34)    2.39                27
 04/28/2018   13:51:23   (  70.98, -30.45) 04/28/2018   13:50:16  (  71.04, -32.74)   82.96                67
 04/28/2018   14:41:06   ( -70.16, 135.96) 04/28/2018   14:40:43  ( -70.14, 136.02)    2.97                23
 04/28/2018   15:30:33   (  70.05, -56.55) 04/28/2018   15:31:27  (  70.04, -56.52)    1.50                54
 05/01/2018   06:08:04   (  70.24,  84.32) 05/01/2018   06:06:56  (  70.22,  84.36)    2.74                68
 05/01/2018   06:57:34   ( -70.13,-108.20) 05/01/2018   06:57:38  ( -70.11,-108.16)    3.15                 4
 05/01/2018   07:47:06   (  69.74,  58.90) 05/01/2018   07:48:17  (  69.75,  59.70)   30.62                71
 05/03/2018   22:24:32   (  70.20,-159.85) 05/03/2018   22:23:51  (  70.19,-159.83)    2.03                41
 05/03/2018   23:14:02   ( -70.10,   7.64) 05/03/2018   23:14:33  ( -70.08,   7.66)    2.92                31