Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 1 30.  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)
 01/30/2021   15:31:31   (  70.01, -56.54) 01/30/2021   15:31:12  (  70.03, -56.48)    3.27                19
 01/30/2021   16:21:00   ( -69.94, 111.00) 01/30/2021   16:21:54  ( -69.93, 110.98)    1.64                54
 02/02/2021   06:58:32   ( -70.15,-108.11) 02/02/2021   06:57:23  ( -70.12,-108.17)    3.30                69
 02/02/2021   07:48:00   (  69.99,  59.31) 02/02/2021   07:48:07  (  70.02,  59.31)    2.88                 7
 02/02/2021   08:37:32   ( -69.71,-133.44) 02/02/2021   08:38:44  ( -69.71,-132.91)   20.33                72
 02/04/2021   23:15:01   ( -70.07,   7.66) 02/04/2021   23:14:16  ( -70.06,   7.70)    2.07                45
 02/05/2021   00:04:28   (  69.97, 175.16) 02/05/2021   00:05:00  (  69.96, 175.17)    1.59                32
 02/07/2021   14:41:50   (  70.71, -43.16) 02/07/2021   14:40:41  (  70.79, -45.00)   67.90                69
 02/07/2021   15:31:30   ( -70.05, 123.51) 02/07/2021   15:31:11  ( -70.05, 123.48)    1.00                19
 02/07/2021   16:20:57   (  69.94, -69.00) 02/07/2021   16:21:55  (  69.95, -69.05)    2.23                58
 02/10/2021   06:58:29   (  70.13,  71.87) 02/10/2021   06:57:23  (  70.10,  71.87)    3.32                66
 02/10/2021   07:47:59   ( -70.02,-120.65) 02/10/2021   07:48:05  ( -69.99,-120.66)    3.22                 6
 02/10/2021   08:37:32   (  69.58,  46.38) 02/10/2021   08:38:43  (  69.57,  47.27)   34.54                71
 02/12/2021   23:14:58   (  70.09,-172.31) 02/12/2021   23:14:18  (  70.10,-172.36)    2.16                40
 02/13/2021   00:04:27   ( -69.99,  -4.82) 02/13/2021   00:04:59  ( -69.99,  -4.88)    2.36                32