Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 2 18.  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)
 02/20/2017   14:41:49   ( -70.16, 136.01) 02/20/2017   14:40:56  ( -70.17, 135.96)    2.03                53
 02/20/2017   15:31:16   (  70.06, -56.49) 02/20/2017   15:31:40  (  70.04, -56.54)    2.69                24
 02/20/2017   16:21:00   ( -69.18, 109.94) 02/20/2017   16:22:07  ( -69.17, 112.05)   83.35                67
 02/23/2017   06:58:18   ( -70.12,-108.18) 02/23/2017   06:57:48  ( -70.09,-108.14)    3.05                30
 02/23/2017   07:47:45   (  70.01,  59.32) 02/23/2017   07:48:33  (  70.02,  59.27)    1.89                48
 02/25/2017   22:25:15   (  70.28,-159.69) 02/25/2017   22:24:02  (  70.31,-160.02)   12.70                73
 02/25/2017   23:14:47   ( -70.07,   7.63) 02/25/2017   23:14:41  ( -70.07,   7.67)    1.62                 6
 02/26/2017   00:04:14   (  69.96, 175.12) 02/26/2017   00:05:25  (  69.95, 175.16)    1.76                71
 02/28/2017   14:41:45   (  70.17, -43.98) 02/28/2017   14:40:52  (  70.14, -43.98)    3.56                53
 02/28/2017   15:31:15   ( -70.06, 123.50) 02/28/2017   15:31:34  ( -70.05, 123.48)    1.91                19
 02/28/2017   16:20:57   (  69.12, -70.12) 02/28/2017   16:22:03  (  69.14, -67.89)   88.73                66
 03/03/2017   06:58:13   (  70.10,  71.81) 03/03/2017   06:57:44  (  70.12,  71.82)    2.39                29
 03/03/2017   07:47:43   ( -70.00,-120.70) 03/03/2017   07:48:25  ( -69.98,-120.64)    3.42                42