Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2016 12 21.  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)
 12/21/2016   06:08:59   (  70.75,  85.14) 12/21/2016   06:07:50  (  70.81,  83.33)   66.70                69
 12/21/2016   06:58:39   ( -70.09,-108.20) 12/21/2016   06:58:20  ( -70.08,-108.19)    0.34                19
 12/21/2016   07:48:06   (  69.98,  59.30) 12/21/2016   07:49:04  (  69.98,  59.28)    1.32                58
 12/23/2016   22:25:38   (  70.14,-159.87) 12/23/2016   22:24:32  (  70.16,-159.85)    2.20                66
 12/23/2016   23:15:07   ( -70.08,   7.68) 12/23/2016   23:15:14  ( -70.06,   7.61)    3.53                 7
 12/24/2016   00:04:41   (  69.59, 174.64) 12/24/2016   00:05:51  (  69.58, 175.63)   38.51                70
 12/26/2016   14:42:05   (  70.13, -44.01) 12/26/2016   14:41:25  (  70.14, -44.05)    1.94                40
 12/26/2016   15:31:35   ( -70.02, 123.47) 12/26/2016   15:32:07  ( -70.04, 123.42)    2.84                32
 12/29/2016   06:08:56   ( -70.77, -94.83) 12/29/2016   06:07:47  ( -70.85, -96.73)   70.06                69
 12/29/2016   06:58:34   (  70.05,  71.77) 12/29/2016   06:58:18  (  70.06,  71.83)    2.50                16
 12/29/2016   07:48:04   ( -69.95,-120.74) 12/29/2016   07:49:00  ( -69.96,-120.70)    2.35                56
 12/31/2016   22:25:35   ( -70.15,  20.14) 12/31/2016   22:24:28  ( -70.15,  20.16)    0.86                67
 12/31/2016   23:15:02   (  70.03,-172.37) 12/31/2016   23:15:12  (  70.05,-172.38)    1.94                10
 01/01/2017   00:04:37   ( -69.65,  -5.26) 01/01/2017   00:05:48  ( -69.63,  -4.43)   32.22                71
 01/03/2017   14:42:03   ( -70.12, 135.99) 01/03/2017   14:41:22  ( -70.14, 135.95)    2.37                41
 01/03/2017   15:31:30   (  70.01, -56.53) 01/03/2017   15:32:05  (  69.98, -56.50)    2.59                35