Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 10 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)
 10/21/2018   14:41:48   ( -70.13, 136.01) 10/21/2018   14:41:18  ( -70.15, 136.07)    2.62                30
 10/21/2018   15:31:15   (  70.03, -56.49) 10/21/2018   15:32:02  (  70.02, -56.43)    2.72                47
 10/24/2018   06:08:45   (  70.34,  84.56) 10/24/2018   06:07:33  (  70.40,  84.12)   17.63                72
 10/24/2018   06:58:17   ( -70.13,-108.12) 10/24/2018   06:58:11  ( -70.11,-108.11)    1.71                 6
 10/24/2018   07:47:44   (  70.02,  59.37) 10/24/2018   07:48:56  (  70.04,  59.31)    3.18                72
 10/26/2018   22:25:17   (  70.22,-159.74) 10/26/2018   22:24:24  (  70.21,-159.82)    2.98                53
 10/26/2018   23:14:48   ( -70.06,   7.66) 10/26/2018   23:15:05  ( -70.08,   7.71)    2.74                17
 10/27/2018   00:04:29   (  69.18, 174.11) 10/27/2018   00:05:35  (  69.21, 176.28)   86.01                66
 10/29/2018   14:41:48   (  70.15, -43.97) 10/29/2018   14:41:17  (  70.13, -43.93)    2.22                31
 10/29/2018   15:31:18   ( -70.04, 123.52) 10/29/2018   15:31:59  ( -70.05, 123.52)    0.63                41
 11/01/2018   06:08:45   ( -70.56, -95.12) 11/01/2018   06:07:34  ( -70.59, -96.19)   39.41                71
 11/01/2018   06:58:18   (  70.12,  71.88) 11/01/2018   06:58:11  (  70.11,  71.88)    1.77                 7
 11/01/2018   07:47:48   ( -70.02,-120.63) 11/01/2018   07:48:53  ( -70.02,-120.67)    1.33                65
 11/03/2018   22:25:20   ( -70.21,  20.24) 11/03/2018   22:24:20  ( -70.20,  20.20)    1.74                60
 11/03/2018   23:14:47   (  70.10,-172.28) 11/03/2018   23:15:04  (  70.08,-172.32)    1.80                17
 11/04/2018   00:04:27   ( -69.45,  -5.55) 11/04/2018   00:05:36  ( -69.47,  -4.08)   57.13                69