Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 1 29.  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   14:41:50   ( -70.84, 137.04) 01/30/2021   14:40:42  ( -70.90, 134.83)   80.87                68
 01/30/2021   15:31:30   (  70.03, -56.50) 01/30/2021   15:31:12  (  70.05, -56.52)    2.35                18
 01/30/2021   16:21:00   ( -69.92, 110.97) 01/30/2021   16:21:53  ( -69.90, 111.02)    2.67                53
 02/02/2021   06:58:32   ( -70.12,-108.15) 02/02/2021   06:57:22  ( -70.10,-108.12)    2.75                70
 02/02/2021   07:47:59   (  70.02,  59.35) 02/02/2021   07:48:06  (  69.99,  59.35)    2.90                 7
 02/02/2021   08:37:33   ( -69.69,-133.48) 02/02/2021   08:38:44  ( -69.68,-132.87)   23.26                71
 02/04/2021   23:15:01   ( -70.10,   7.70) 02/04/2021   23:14:17  ( -70.09,   7.66)    2.34                44
 02/05/2021   00:04:28   (  70.00, 175.20) 02/05/2021   00:05:01  (  69.98, 175.13)    3.07                33
 02/07/2021   14:41:50   (  70.73, -43.12) 02/07/2021   14:40:41  (  70.76, -44.96)   67.46                69
 02/07/2021   15:31:31   ( -70.02, 123.47) 02/07/2021   15:31:11  ( -70.03, 123.52)    1.97                20
 02/07/2021   16:20:57   (  69.91, -69.04) 02/07/2021   16:21:54  (  69.93, -69.02)    1.59                57
 02/10/2021   06:58:29   (  70.10,  71.82) 02/10/2021   06:57:23  (  70.13,  71.82)    3.48                66
 02/10/2021   07:47:59   ( -69.99,-120.69) 02/10/2021   07:48:05  ( -70.02,-120.70)    3.24                 6
 02/10/2021   08:37:32   (  69.55,  46.34) 02/10/2021   08:38:42  (  69.55,  47.31)   37.38                70