Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2016 12 16.  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)
 12/18/2016   14:42:11   ( -70.10, 135.94) 12/18/2016   14:41:26  ( -70.10, 136.01)    2.86                45
 12/18/2016   15:31:38   (  69.99, -56.57) 12/18/2016   15:32:10  (  70.00, -56.52)    1.70                32
 12/21/2016   06:08:59   (  70.75,  85.15) 12/21/2016   06:07:50  (  70.81,  83.34)   66.57                69
 12/21/2016   06:58:39   ( -70.10,-108.18) 12/21/2016   06:58:20  ( -70.07,-108.17)    2.75                19
 12/21/2016   07:48:06   (  69.99,  59.31) 12/21/2016   07:49:04  (  69.97,  59.29)    2.20                58
 12/23/2016   22:25:37   (  70.14,-159.87) 12/23/2016   22:24:31  (  70.15,-159.84)    1.38                66
 12/23/2016   23:15:07   ( -70.03,   7.61) 12/23/2016   23:15:13  ( -70.04,   7.64)    1.35                 6
 12/24/2016   00:04:40   (  69.59, 174.65) 12/24/2016   00:05:50  (  69.57, 175.65)   38.74                70
 12/26/2016   14:42:05   (  70.13, -44.00) 12/26/2016   14:41:25  (  70.13, -44.04)    1.15                40
 12/26/2016   15:31:35   ( -70.02, 123.48) 12/26/2016   15:32:07  ( -70.02, 123.44)    1.47                32
 12/29/2016   06:08:56   ( -70.77, -94.82) 12/29/2016   06:07:47  ( -70.83, -96.70)   68.93                69
 12/29/2016   06:58:34   (  70.05,  71.77) 12/29/2016   06:58:18  (  70.05,  71.85)    2.94                16
 12/29/2016   07:48:04   ( -69.95,-120.74) 12/29/2016   07:49:00  ( -69.95,-120.67)    2.52                56