Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 1 22.  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)
 01/22/2021   14:41:50   (  70.80, -43.01) 01/22/2021   14:40:42  (  70.85, -45.10)   76.48                68
 01/22/2021   15:31:32   ( -70.03, 123.49) 01/22/2021   15:31:10  ( -70.02, 123.54)    2.19                22
 01/22/2021   16:20:59   (  69.93, -69.01) 01/22/2021   16:21:54  (  69.91, -68.98)    2.02                55
 01/25/2021   06:58:32   (  70.09,  71.82) 01/25/2021   06:57:23  (  70.10,  71.87)    2.61                69
 01/25/2021   07:48:01   ( -70.03,-120.63) 01/25/2021   07:48:05  ( -70.00,-120.66)    3.18                 4
 01/25/2021   08:37:33   (  69.65,  46.49) 01/25/2021   08:38:44  (  69.63,  47.20)   27.63                71
 01/27/2021   23:15:01   (  70.08,-172.31) 01/27/2021   23:14:18  (  70.09,-172.34)    1.55                43
 01/28/2021   00:04:31   ( -69.97,  -4.83) 01/28/2021   00:05:00  ( -69.99,  -4.87)    2.25                29
 01/30/2021   14:41:51   ( -70.84, 137.04) 01/30/2021   14:40:43  ( -70.92, 134.80)   82.03                68
 01/30/2021   15:31:31   (  70.02, -56.52) 01/30/2021   15:31:12  (  70.03, -56.48)    1.92                19
 01/30/2021   16:21:01   ( -69.91, 110.96) 01/30/2021   16:21:54  ( -69.92, 111.00)    1.81                53
 02/02/2021   06:58:32   ( -70.12,-108.15) 02/02/2021   06:57:22  ( -70.12,-108.16)    0.66                70
 02/02/2021   07:47:59   (  70.01,  59.34) 02/02/2021   07:48:06  (  70.02,  59.30)    2.51                 7
 02/02/2021   08:37:32   ( -69.74,-133.40) 02/02/2021   08:38:44  ( -69.71,-132.91)   19.28                72
 02/04/2021   23:15:02   ( -70.05,   7.63) 02/04/2021   23:14:16  ( -70.07,   7.70)    2.92                46
 02/05/2021   00:04:28   (  69.99, 175.20) 02/05/2021   00:05:00  (  69.97, 175.15)    3.00                32