Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 25.  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)
 09/27/2021   14:42:16   ( -70.11, 135.99) 09/27/2021   14:41:41  ( -70.10, 135.92)    3.12                35
 09/27/2021   15:31:44   (  69.96, -56.58) 09/27/2021   15:32:24  (  69.94, -56.53)    3.13                40
 09/30/2021   06:09:11   (  70.47,  84.75) 09/30/2021   06:08:00  (  70.52,  83.72)   38.74                71
 09/30/2021   06:58:47   ( -70.03,-108.25) 09/30/2021   06:58:35  ( -70.05,-108.23)    2.37                12
 09/30/2021   07:48:14   (  69.92,  59.25) 09/30/2021   07:49:19  (  69.94,  59.24)    1.75                65
 10/02/2021   22:25:48   (  70.10,-159.90) 10/02/2021   22:24:48  (  70.10,-159.86)    1.70                60
 10/02/2021   23:15:18   ( -69.99,   7.58) 10/02/2021   23:15:30  ( -70.00,   7.62)    1.51                12
 10/03/2021   00:04:55   (  69.34, 174.33) 10/03/2021   00:06:03  (  69.31, 175.94)   63.34                68
 10/05/2021   14:42:19   (  70.07, -44.07) 10/05/2021   14:41:43  (  70.05, -44.02)    2.62                36
 10/05/2021   15:31:49   ( -69.96, 123.41) 10/05/2021   15:32:25  ( -69.95, 123.46)    2.55                36
 10/08/2021   06:09:15   ( -70.58, -95.10) 10/08/2021   06:08:04  ( -70.63, -96.47)   50.95                71
 10/08/2021   06:58:50   (  70.03,  71.75) 10/08/2021   06:58:38  (  70.01,  71.82)    3.31                12
 10/08/2021   07:48:20   ( -69.93,-120.76) 10/08/2021   07:49:21  ( -69.96,-120.78)    3.12                61