Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2020 12 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)
 01/01/2021   06:58:38   ( -70.31,-107.87) 01/01/2021   06:57:25  ( -70.37,-108.51)   24.81                73
 01/01/2021   07:48:09   (  69.99,  59.31) 01/01/2021   07:48:04  (  69.99,  59.38)    2.93                 5
 01/01/2021   08:37:38   ( -69.93,-133.14) 01/01/2021   08:38:46  ( -69.90,-133.16)    3.24                68
 01/03/2021   23:15:09   ( -70.10,   7.70) 01/03/2021   23:14:14  ( -70.07,   7.72)    2.91                55
 01/04/2021   00:04:36   (  69.99, 175.19) 01/04/2021   00:04:58  (  69.96, 175.20)    3.11                22
 01/04/2021   00:54:19   ( -69.16, -18.29) 01/04/2021   00:55:26  ( -69.12, -16.27)   79.93                67
 01/06/2021   15:31:38   ( -70.04, 123.51) 01/06/2021   15:31:09  ( -70.04, 123.54)    1.52                29
 01/06/2021   16:21:05   (  69.93, -69.01) 01/06/2021   16:21:53  (  69.93, -68.98)    0.84                48
 01/09/2021   06:58:36   (  70.13,  71.89) 01/09/2021   06:57:23  (  70.16,  71.81)    4.25                73
 01/09/2021   07:48:06   ( -70.03,-120.62) 01/09/2021   07:48:04  ( -70.00,-120.64)    3.14                 2
 01/09/2021   08:37:34   (  69.86,  46.78) 01/09/2021   08:38:47  (  69.85,  46.90)    4.89                73
 01/11/2021   23:15:05   (  70.06,-172.33) 01/11/2021   23:14:17  (  70.08,-172.31)    2.24                48
 01/12/2021   00:04:35   ( -69.96,  -4.84) 01/12/2021   00:04:59  ( -69.97,  -4.83)    1.45                24