Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 3 17.  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)
 03/19/2021   14:41:39   ( -70.39, 136.34) 03/19/2021   14:40:27  ( -70.45, 135.55)   30.29                72
 03/19/2021   15:31:10   (  70.07, -56.48) 03/19/2021   15:31:06  (  70.07, -56.53)    2.18                 4
 03/19/2021   16:20:40   ( -69.95, 111.00) 03/19/2021   16:21:47  ( -69.94, 110.98)    1.93                67
 03/22/2021   06:58:10   ( -70.12,-108.16) 03/22/2021   06:57:14  ( -70.12,-108.14)    0.93                56
 03/22/2021   07:47:37   (  70.02,  59.33) 03/22/2021   07:47:58  (  69.99,  59.35)    2.55                21
 03/22/2021   08:37:19   ( -69.25,-134.08) 03/22/2021   08:38:27  ( -69.22,-132.21)   73.76                68
 03/24/2021   23:14:38   ( -70.07,   7.65) 03/24/2021   23:14:08  ( -70.10,   7.66)    2.72                30
 03/25/2021   00:04:05   (  69.96, 175.14) 03/25/2021   00:04:52  (  69.98, 175.15)    1.80                47
 03/27/2021   14:41:34   (  70.23, -43.87) 03/27/2021   14:40:22  (  70.27, -44.15)   11.54                72
 03/27/2021   15:31:05   ( -70.07, 123.53) 03/27/2021   15:31:02  ( -70.08, 123.46)    2.91                 3
 03/27/2021   16:20:33   (  69.90, -69.06) 03/27/2021   16:21:45  (  69.91, -68.97)    3.54                72
 03/30/2021   06:58:03   (  70.11,  71.84) 03/30/2021   06:57:13  (  70.10,  71.88)    1.89                50
 03/30/2021   07:47:33   ( -70.01,-120.67) 03/30/2021   07:47:55  ( -70.01,-120.66)    0.53                22