Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 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)
 12/21/2018   22:25:19   ( -70.15,  20.16) 12/21/2018   22:24:21  ( -70.17,  20.15)    1.44                58
 12/21/2018   23:14:46   (  70.05,-172.34) 12/21/2018   23:15:05  (  70.06,-172.38)    1.44                19
 12/22/2018   00:04:27   ( -69.33,  -5.69) 12/22/2018   00:05:35  ( -69.33,  -3.98)   66.93                68
 12/24/2018   14:41:50   ( -70.10, 135.96) 12/24/2018   14:41:15  ( -70.12, 135.98)    2.71                35
 12/24/2018   15:31:17   (  70.00, -56.54) 12/24/2018   15:31:59  (  70.02, -56.55)    2.28                42
 12/27/2018   06:08:44   (  70.50,  84.78) 12/27/2018   06:07:33  (  70.56,  83.76)   38.54                71
 12/27/2018   06:58:20   ( -70.07,-108.22) 12/27/2018   06:58:08  ( -70.08,-108.19)    2.25                12
 12/27/2018   07:47:47   (  69.96,  59.28) 12/27/2018   07:48:52  (  69.98,  59.28)    2.47                65
 12/29/2018   22:25:21   (  70.15,-159.85) 12/29/2018   22:24:20  (  70.15,-159.84)    0.56                61
 12/29/2018   23:14:51   ( -70.05,   7.63) 12/29/2018   23:15:02  ( -70.05,   7.64)    0.50                11
 12/30/2018   00:04:27   (  69.44, 174.44) 12/30/2018   00:05:36  (  69.42, 175.88)   56.19                69
 01/01/2019   14:41:53   (  70.10, -44.07) 01/01/2019   14:41:14  (  70.12, -44.02)    3.26                39
 01/01/2019   15:31:23   ( -70.00, 123.43) 01/01/2019   15:31:56  ( -70.01, 123.47)    2.21                33