Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2015 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)
 12/21/2015   21:36:05   ( -70.33,  32.77) 12/21/2015   21:35:34  ( -70.31,  32.70)    3.48                31
 12/21/2015   22:25:33   (  70.18,-159.81) 12/21/2015   22:26:18  (  70.20,-159.82)    2.24                45
 12/24/2015   13:03:01   (  70.55, -18.66) 12/24/2015   13:01:49  (  70.65, -19.38)   28.52                72
 12/24/2015   13:52:34   ( -70.27, 148.56) 12/24/2015   13:52:26  ( -70.29, 148.50)    3.11                 8
 12/24/2015   14:42:01   (  70.17, -43.94) 12/24/2015   14:43:10  (  70.18, -44.02)    3.11                69
 12/27/2015   05:19:34   (  70.30,  96.85) 12/27/2015   05:18:36  (  70.32,  96.92)    2.80                58
 12/27/2015   06:09:03   ( -70.25, -95.59) 12/27/2015   06:09:18  ( -70.22, -95.62)    2.76                15
 12/27/2015   06:58:42   (  69.48,  70.98) 12/27/2015   06:59:50  (  69.48,  72.80)   70.83                68
 12/29/2015   21:36:02   (  70.31,-147.25) 12/29/2015   21:35:29  (  70.31,-147.30)    1.92                33
 12/29/2015   22:25:32   ( -70.21,  20.23) 12/29/2015   22:26:11  ( -70.21,  20.17)    2.47                39
 01/01/2016   13:02:56   ( -70.80, 161.71) 01/01/2016   13:01:46  ( -70.83, 160.33)   50.67                70
 01/01/2016   13:52:31   (  70.25, -31.45) 01/01/2016   13:52:21  (  70.25, -31.43)    0.80                10
 01/01/2016   14:42:01   ( -70.15, 136.03) 01/01/2016   14:43:03  ( -70.16, 136.03)    1.04                62
 01/04/2016   05:19:31   ( -70.34, -83.08) 01/04/2016   05:18:29  ( -70.36, -83.14)    2.68                62
 01/04/2016   06:08:58   (  70.23,  84.40) 01/04/2016   06:09:13  (  70.25,  84.34)    3.27                15
 01/04/2016   06:58:36   ( -69.69,-108.73) 01/04/2016   06:59:46  ( -69.68,-107.49)   48.11                70