Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2015 12 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)
 12/19/2015   05:19:36   ( -70.35, -83.09) 12/19/2015   05:18:42  ( -70.37, -83.16)    3.40                54
 12/19/2015   06:09:04   (  70.19,  84.33) 12/19/2015   06:09:25  (  70.21,  84.40)    2.93                21
 12/19/2015   06:58:46   ( -69.42,-109.10) 12/19/2015   06:59:53  ( -69.37,-107.04)   80.82                67
 12/21/2015   21:36:05   ( -70.31,  32.74) 12/21/2015   21:35:33  ( -70.29,  32.74)    2.78                32
 12/21/2015   22:25:33   (  70.16,-159.84) 12/21/2015   22:26:17  (  70.18,-159.78)    3.48                44
 12/24/2015   13:03:01   (  70.59, -18.60) 12/24/2015   13:01:49  (  70.62, -19.34)   27.40                72
 12/24/2015   13:52:35   ( -70.27, 148.55) 12/24/2015   13:52:26  ( -70.26, 148.55)    0.31                 9
 12/24/2015   14:42:02   (  70.16, -43.96) 12/24/2015   14:43:10  (  70.16, -43.98)    0.88                68
 12/27/2015   05:19:35   (  70.31,  96.87) 12/27/2015   05:18:37  (  70.34,  96.88)    2.82                58
 12/27/2015   06:09:04   ( -70.26, -95.58) 12/27/2015   06:09:19  ( -70.24, -95.65)    3.51                15
 12/27/2015   06:58:43   (  69.49,  71.00) 12/27/2015   06:59:51  (  69.50,  72.77)   69.10                68
 12/29/2015   21:36:04   (  70.30,-147.28) 12/29/2015   21:35:30  (  70.32,-147.32)    3.25                34
 12/29/2015   22:25:34   ( -70.19,  20.20) 12/29/2015   22:26:11  ( -70.17,  20.23)    2.41                37