Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 12 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)
 12/21/2018   22:25:19   ( -70.18,  20.19) 12/21/2018   22:24:21  ( -70.17,  20.14)    1.88                58
 12/21/2018   23:14:46   (  70.07,-172.31) 12/21/2018   23:15:05  (  70.07,-172.39)    2.96                19
 12/22/2018   00:04:27   ( -69.36,  -5.66) 12/22/2018   00:05:35  ( -69.33,  -4.00)   65.42                68
 12/24/2018   14:41:50   ( -70.15, 136.02) 12/24/2018   14:41:15  ( -70.13, 135.97)    2.63                35
 12/24/2018   15:31:17   (  70.04, -56.48) 12/24/2018   15:31:59  (  70.03, -56.56)    3.36                42
 12/27/2018   06:08:45   (  70.58,  84.89) 12/27/2018   06:07:35  (  70.62,  83.66)   45.58                70
 12/27/2018   06:58:22   ( -70.09,-108.19) 12/27/2018   06:58:09  ( -70.09,-108.20)    0.26                13
 12/27/2018   07:47:49   (  69.98,  59.30) 12/27/2018   07:48:53  (  69.99,  59.27)    1.65                64
 12/29/2018   22:25:23   (  70.16,-159.86) 12/29/2018   22:24:20  (  70.16,-159.85)    0.44                63
 12/29/2018   23:14:53   ( -70.06,   7.63) 12/29/2018   23:15:02  ( -70.05,   7.63)    0.56                 9
 12/30/2018   00:04:28   (  69.50, 174.51) 12/30/2018   00:05:37  (  69.48, 175.79)   49.94                69
 01/01/2019   14:41:55   (  70.15, -44.01) 01/01/2019   14:41:14  (  70.13, -44.03)    2.31                41
 01/01/2019   15:31:26   ( -69.99, 123.41) 01/01/2019   15:31:56  ( -70.01, 123.46)    3.04                30