Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 4 12.  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)
 04/12/2018   14:41:15   ( -70.18, 136.00) 04/12/2018   14:40:41  ( -70.20, 135.94)    3.27                34
 04/12/2018   15:30:43   (  70.02, -56.58) 04/12/2018   15:31:24  (  70.04, -56.50)    3.27                41
 04/15/2018   06:08:10   (  70.43,  84.61) 04/15/2018   06:06:58  (  70.46,  83.98)   23.58                72
 04/15/2018   06:57:43   ( -70.15,-108.16) 04/15/2018   06:57:36  ( -70.15,-108.21)    1.84                 7
 04/15/2018   07:47:10   (  70.04,  59.33) 04/15/2018   07:48:20  (  70.04,  59.26)    2.88                70
 04/17/2018   22:24:41   (  70.22,-159.81) 04/17/2018   22:23:49  (  70.21,-159.85)    2.27                52
 04/17/2018   23:14:11   ( -70.11,   7.67) 04/17/2018   23:14:31  ( -70.10,   7.63)    1.75                20
 04/18/2018   00:03:53   (  69.18, 174.04) 04/18/2018   00:04:59  (  69.15, 176.33)   90.72                66
 04/20/2018   14:41:08   (  70.18, -43.99) 04/20/2018   14:40:43  (  70.17, -44.02)    1.79                25
 04/20/2018   15:30:38   ( -70.07, 123.49) 04/20/2018   15:31:25  ( -70.06, 123.47)    1.82                47
 04/23/2018   06:08:09   ( -70.25, -95.66) 04/23/2018   06:06:55  ( -70.28, -95.72)    3.98                74
 04/23/2018   06:57:36   (  70.13,  71.82) 04/23/2018   06:57:38  (  70.13,  71.81)    0.65                 2
 04/23/2018   07:47:07   ( -69.97,-120.77) 04/23/2018   07:48:20  ( -70.02,-120.70)    5.48                73
 04/25/2018   22:24:37   ( -70.20,  20.15) 04/25/2018   22:23:49  ( -70.18,  20.19)    2.14                48
 04/25/2018   23:14:04   (  70.08,-172.37) 04/25/2018   23:14:33  (  70.09,-172.36)    1.19                29