Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 12 28.  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)
 12/29/2017   14:42:04   (  70.12, -44.04) 12/29/2017   14:41:07  (  70.13, -44.01)    1.23                57
 12/29/2017   15:31:34   ( -70.01, 123.43) 12/29/2017   15:31:49  ( -70.03, 123.45)    3.04                15
 12/29/2017   16:21:13   (  69.24, -69.96) 12/29/2017   16:22:20  (  69.23, -68.07)   74.57                67
 01/01/2018   06:58:33   (  70.08,  71.78) 01/01/2018   06:58:00  (  70.09,  71.83)    2.20                33
 01/01/2018   07:48:03   ( -69.97,-120.75) 01/01/2018   07:48:42  ( -69.99,-120.71)    3.26                39
 01/03/2018   22:25:28   ( -70.52,  20.65) 01/03/2018   22:24:17  ( -70.57,  19.53)   42.00                71
 01/03/2018   23:15:01   (  70.08,-172.33) 01/03/2018   23:14:53  (  70.05,-172.34)    3.48                 8
 01/04/2018   00:04:31   ( -69.97,  -4.86) 01/04/2018   00:05:35  ( -69.95,  -4.87)    2.41                64
 01/06/2018   14:42:02   ( -70.13, 135.98) 01/06/2018   14:41:01  ( -70.12, 136.03)    2.71                61
 01/06/2018   15:31:29   (  70.03, -56.53) 01/06/2018   15:31:45  (  70.01, -56.51)    1.52                16
 01/06/2018   16:21:08   ( -69.42, 110.28) 01/06/2018   16:22:17  ( -69.38, 111.73)   57.22                69
 01/09/2018   06:58:30   ( -70.13,-108.15) 01/09/2018   06:57:55  ( -70.13,-108.23)    3.03                35
 01/09/2018   07:47:58   (  69.96,  59.26) 01/09/2018   07:48:38  (  69.98,  59.32)    2.81                40