Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2020 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)
 12/21/2020   15:31:43   ( -70.07, 123.55) 12/21/2020   15:31:07  ( -70.07, 123.52)    1.07                36
 12/21/2020   16:21:10   (  69.97, -68.96) 12/21/2020   16:21:51  (  69.95, -68.99)    2.76                41
 12/24/2020   06:58:37   (  70.38,  72.23) 12/24/2020   06:57:25  (  70.43,  71.41)   31.06                72
 12/24/2020   07:48:11   ( -70.05,-120.61) 12/24/2020   07:48:01  ( -70.02,-120.64)    3.08                10
 12/24/2020   08:37:39   (  69.89,  46.81) 12/24/2020   08:38:45  (  69.90,  46.85)    2.53                66
 12/26/2020   23:15:11   (  70.07,-172.33) 12/26/2020   23:14:14  (  70.07,-172.27)    2.52                57
 12/27/2020   00:04:41   ( -69.96,  -4.85) 12/27/2020   00:04:56  ( -69.98,  -4.81)    2.34                15
 12/27/2020   00:54:20   (  69.19, 161.75) 12/27/2020   00:55:27  (  69.17, 163.67)   75.97                67
 12/29/2020   15:31:40   (  70.03, -56.51) 12/29/2020   15:31:09  (  70.03, -56.44)    2.44                31
 12/29/2020   16:21:10   ( -69.93, 110.98) 12/29/2020   16:21:51  ( -69.94, 111.02)    1.87                41
 01/01/2021   06:58:38   ( -70.32,-107.85) 01/01/2021   06:57:26  ( -70.42,-108.59)   29.61                72
 01/01/2021   07:48:09   (  69.99,  59.31) 01/01/2021   07:48:04  (  70.00,  59.37)    2.87                 5
 01/01/2021   08:37:39   ( -69.89,-133.19) 01/01/2021   08:38:46  ( -69.90,-133.16)    2.14                67
 01/03/2021   23:15:09   ( -70.11,   7.73) 01/03/2021   23:14:15  ( -70.12,   7.64)    3.43                54
 01/04/2021   00:04:36   (  69.99, 175.20) 01/04/2021   00:04:58  (  69.97, 175.19)    2.54                22