Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 9 29.  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)
 09/29/2017   22:25:38   ( -70.22,  20.26) 09/29/2017   22:24:31  ( -70.20,  20.22)    2.90                67
 09/29/2017   23:15:06   (  70.07,-172.32) 09/29/2017   23:15:15  (  70.07,-172.27)    1.67                 9
 09/30/2017   00:04:40   ( -69.73,  -5.15) 09/30/2017   00:05:52  ( -69.73,  -4.44)   27.34                72
 10/02/2017   14:42:09   ( -70.17, 136.06) 10/02/2017   14:41:26  ( -70.17, 136.03)    1.07                43
 10/02/2017   15:31:36   (  70.07, -56.44) 10/02/2017   15:32:10  (  70.04, -56.47)    3.33                34
 10/05/2017   06:09:00   (  70.77,  85.19) 10/05/2017   06:07:51  (  70.85,  83.38)   66.72                69
 10/05/2017   06:58:40   ( -70.11,-108.14) 10/05/2017   06:58:21  ( -70.14,-108.16)    2.82                19
 10/05/2017   07:48:07   (  70.01,  59.35) 10/05/2017   07:49:05  (  70.01,  59.34)    0.94                58
 10/07/2017   22:25:40   (  70.21,-159.76) 10/07/2017   22:24:34  (  70.20,-159.81)    2.28                66
 10/07/2017   23:15:10   ( -70.10,   7.72) 10/07/2017   23:15:16  ( -70.11,   7.64)    3.16                 6
 10/08/2017   00:04:43   (  69.66, 174.75) 10/08/2017   00:05:54  (  69.67, 175.61)   32.95                71
 10/10/2017   14:42:10   (  70.14, -43.99) 10/10/2017   14:41:27  (  70.13, -43.93)    2.39                43
 10/10/2017   15:31:40   ( -70.03, 123.50) 10/10/2017   15:32:09  ( -70.04, 123.52)    0.83                29
 10/13/2017   06:09:00   ( -70.93, -94.56) 10/13/2017   06:07:52  ( -70.96, -96.81)   81.59                68
 10/13/2017   06:58:40   (  70.11,  71.86) 10/13/2017   06:58:22  (  70.11,  71.86)    0.47                18
 10/13/2017   07:48:10   ( -70.01,-120.65) 10/13/2017   07:49:04  ( -70.02,-120.69)    1.65                54