Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 3 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)
 03/21/2017   22:24:59   ( -70.51,  20.62) 03/21/2017   22:23:48  ( -70.58,  19.62)   38.02                71
 03/21/2017   23:14:31   (  70.13,-172.28) 03/21/2017   23:14:25  (  70.11,-172.33)    3.09                 6
 03/22/2017   00:04:01   ( -70.01,  -4.81) 03/22/2017   00:05:07  ( -70.01,  -4.87)    2.11                66
 03/24/2017   14:41:31   ( -70.19, 136.04) 03/24/2017   14:40:32  ( -70.16, 136.06)    3.13                59
 03/24/2017   15:30:58   (  70.08, -56.47) 03/24/2017   15:31:16  (  70.06, -56.48)    2.58                18
 03/24/2017   16:20:39   ( -69.37, 110.18) 03/24/2017   16:21:47  ( -69.38, 111.85)   65.22                68
 03/27/2017   06:57:59   ( -70.14,-108.15) 03/27/2017   06:57:25  ( -70.16,-108.16)    2.56                34
 03/27/2017   07:47:26   (  70.03,  59.34) 03/27/2017   07:48:08  (  70.01,  59.38)    2.46                42
 03/29/2017   22:24:52   (  70.47,-159.43) 03/29/2017   22:23:41  (  70.54,-160.29)   33.09                71
 03/29/2017   23:14:27   ( -70.09,   7.66) 03/29/2017   23:14:17  ( -70.11,   7.69)    3.12                10
 03/30/2017   00:03:53   (  70.03, 175.22) 03/30/2017   00:05:01  (  70.02, 175.14)    3.08                68
 04/01/2017   14:41:24   (  70.19, -43.95) 04/01/2017   14:40:27  (  70.18, -43.95)    1.04                57
 04/01/2017   15:30:54   ( -70.09, 123.54) 04/01/2017   15:31:09  ( -70.07, 123.54)    2.23                15
 04/01/2017   16:20:33   (  69.31, -69.88) 04/01/2017   16:21:40  (  69.29, -68.00)   73.90                67