Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 8 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)
 08/10/2018   13:51:35   ( -71.06, 149.81) 08/10/2018   13:50:28  ( -71.10, 147.20)   94.32                67
 08/10/2018   14:41:17   (  70.14, -43.91) 08/10/2018   14:40:56  (  70.15, -43.95)    1.47                21
 08/10/2018   15:30:47   ( -70.03, 123.55) 08/10/2018   15:31:37  ( -70.00, 123.59)    3.26                50
 08/13/2018   06:08:21   ( -70.22, -95.58) 08/13/2018   06:07:08  ( -70.21, -95.58)    1.30                73
 08/13/2018   06:57:48   (  70.12,  71.92) 08/13/2018   06:57:52  (  70.10,  71.90)    2.52                 4
 08/13/2018   07:47:20   ( -69.89,-120.76) 08/13/2018   07:48:32  ( -69.89,-120.48)   10.69                72
 08/15/2018   22:24:52   ( -70.19,  20.26) 08/15/2018   22:24:05  ( -70.20,  20.19)    3.03                47
 08/15/2018   23:14:19   (  70.03,-172.32) 08/15/2018   23:14:47  (  70.04,-172.26)    2.86                28
 08/18/2018   13:51:40   (  70.92, -30.40) 08/18/2018   13:50:32  (  70.99, -32.63)   81.43                68
 08/18/2018   14:41:22   ( -70.16, 136.09) 08/18/2018   14:41:00  ( -70.15, 136.04)    2.23                22
 08/18/2018   15:30:50   (  69.99, -56.49) 08/18/2018   15:31:43  (  69.99, -56.41)    2.98                53
 08/21/2018   06:08:23   (  70.22,  84.44) 08/21/2018   06:07:14  (  70.20,  84.40)    2.37                69
 08/21/2018   06:57:53   ( -70.12,-108.08) 08/21/2018   06:57:56  ( -70.09,-108.11)    3.11                 3
 08/21/2018   07:47:24   (  69.79,  59.10) 08/21/2018   07:48:36  (  69.78,  59.67)   21.76                72
 08/23/2018   22:24:54   (  70.18,-159.75) 08/23/2018   22:24:10  (  70.16,-159.75)    2.61                44
 08/23/2018   23:14:25   ( -70.02,   7.66) 08/23/2018   23:14:52  ( -70.04,   7.74)    3.38                27