Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 10 19.  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)
 10/21/2017   06:09:01   (  70.88,  85.34) 10/21/2017   06:07:53  (  70.93,  83.22)   77.57                68
 10/21/2017   06:58:43   ( -70.11,-108.17) 10/21/2017   06:58:21  ( -70.11,-108.16)    0.56                22
 10/21/2017   07:48:10   (  70.01,  59.34) 10/21/2017   07:49:05  (  69.98,  59.34)    2.58                55
 10/23/2017   22:25:42   (  70.18,-159.82) 10/23/2017   22:24:33  (  70.18,-159.83)    0.72                69
 10/23/2017   23:15:12   ( -70.07,   7.66) 10/23/2017   23:15:14  ( -70.05,   7.70)    2.38                 2
 10/24/2017   00:04:43   (  69.74, 174.85) 10/24/2017   00:05:54  (  69.71, 175.51)   25.69                71
 10/26/2017   14:42:12   (  70.13, -44.01) 10/26/2017   14:41:27  (  70.13, -43.97)    1.32                45
 10/26/2017   15:31:42   ( -70.02, 123.47) 10/26/2017   15:32:09  ( -70.04, 123.47)    2.46                27
 10/29/2017   06:09:00   ( -71.00, -94.47) 10/29/2017   06:07:53  ( -71.03, -96.96)   90.39                67
 10/29/2017   06:58:41   (  70.13,  71.87) 10/29/2017   06:58:22  (  70.13,  71.79)    3.01                19
 10/29/2017   07:48:12   ( -69.97,-120.72) 10/29/2017   07:49:03  ( -69.99,-120.68)    2.46                51
 10/31/2017   22:25:44   ( -70.18,  20.18) 10/31/2017   22:24:32  ( -70.19,  20.16)    1.21                72
 10/31/2017   23:15:11   (  70.07,-172.33) 10/31/2017   23:15:16  (  70.07,-172.36)    1.29                 5
 11/01/2017   00:04:43   ( -69.86,  -5.00) 11/01/2017   00:05:55  ( -69.82,  -4.67)   13.11                72