Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2020 12 19.  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   ( -70.08, 123.55) 12/21/2020   15:31:07  ( -70.07, 123.52)    1.16                36
 12/21/2020   16:21:10   (  69.97, -68.96) 12/21/2020   16:21:51  (  69.95, -68.99)    2.42                41
 12/24/2020   06:58:37   (  70.37,  72.23) 12/24/2020   06:57:25  (  70.43,  71.41)   31.13                72
 12/24/2020   07:48:11   ( -70.05,-120.61) 12/24/2020   07:48:01  ( -70.02,-120.64)    3.11                10
 12/24/2020   08:37:39   (  69.88,  46.80) 12/24/2020   08:38:45  (  69.91,  46.84)    2.97                66
 12/26/2020   23:15:11   (  70.06,-172.34) 12/26/2020   23:14:14  (  70.07,-172.27)    2.76                57
 12/27/2020   00:04:41   ( -69.96,  -4.85) 12/27/2020   00:04:56  ( -69.98,  -4.81)    2.53                15
 12/27/2020   00:54:20   (  69.18, 161.74) 12/27/2020   00:55:27  (  69.18, 163.67)   76.01                67
 12/29/2020   15:31:40   (  70.02, -56.51) 12/29/2020   15:31:09  (  70.04, -56.45)    2.93                31
 12/29/2020   16:21:10   ( -69.92, 110.98) 12/29/2020   16:21:51  ( -69.94, 111.02)    2.33                41
 01/01/2021   06:58:38   ( -70.31,-107.86) 01/01/2021   06:57:25  ( -70.37,-108.51)   24.99                73
 01/01/2021   07:48:08   (  70.03,  59.38) 01/01/2021   07:48:04  (  70.00,  59.37)    3.09                 4
 01/01/2021   08:37:39   ( -69.88,-133.20) 01/01/2021   08:38:46  ( -69.90,-133.16)    3.02                67