Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 12 29.  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   (  70.13, -44.02) 12/29/2017   14:41:07  (  70.12, -44.00)    1.84                57
 12/29/2017   15:31:34   ( -70.02, 123.45) 12/29/2017   15:31:49  ( -70.03, 123.47)    1.24                15
 12/29/2017   16:21:13   (  69.25, -69.95) 12/29/2017   16:22:20  (  69.23, -68.06)   74.60                67
 01/01/2018   06:58:33   (  70.09,  71.80) 01/01/2018   06:58:00  (  70.08,  71.84)    2.11                33
 01/01/2018   07:48:03   ( -69.98,-120.73) 01/01/2018   07:48:42  ( -69.98,-120.69)    1.59                39
 01/03/2018   22:25:27   ( -70.53,  20.67) 01/03/2018   22:24:16  ( -70.57,  19.55)   41.83                71
 01/03/2018   23:15:01   (  70.04,-172.39) 01/03/2018   23:14:52  (  70.04,-172.32)    2.63                 9
 01/04/2018   00:04:31   ( -69.93,  -4.91) 01/04/2018   00:05:34  ( -69.94,  -4.86)    2.54                63
 01/06/2018   14:42:02   ( -70.15, 136.00) 01/06/2018   14:41:02  ( -70.16, 135.96)    1.77                60
 01/06/2018   15:31:29   (  70.04, -56.51) 01/06/2018   15:31:46  (  70.06, -56.57)    2.81                17
 01/06/2018   16:21:09   ( -69.38, 110.22) 01/06/2018   16:22:18  ( -69.43, 111.67)   56.95                69
 01/09/2018   06:58:31   ( -70.09,-108.20) 01/09/2018   06:57:55  ( -70.12,-108.21)    3.11                36
 01/09/2018   07:47:58   (  69.98,  59.29) 01/09/2018   07:48:38  (  69.97,  59.34)    2.57                40
 01/11/2018   22:25:24   (  70.47,-159.41) 01/11/2018   22:24:13  (  70.56,-160.43)   39.32                71
 01/11/2018   23:14:59   ( -70.09,   7.67) 01/11/2018   23:14:48  ( -70.09,   7.62)    2.01                11
 01/12/2018   00:04:26   (  69.97, 175.16) 01/12/2018   00:05:32  (  69.99, 175.08)    3.12                66