Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 6.  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)
 04/07/2021   06:58:08   ( -70.16,-108.14) 04/07/2021   06:57:09  ( -70.16,-108.19)    1.73                59
 04/07/2021   07:47:35   (  70.06,  59.35) 04/07/2021   07:47:53  (  70.03,  59.31)    3.12                18
 04/07/2021   08:37:15   ( -69.40,-133.92) 04/07/2021   08:38:24  ( -69.38,-132.40)   59.60                69
 04/09/2021   23:14:37   ( -70.12,   7.67) 04/09/2021   23:14:02  ( -70.10,   7.68)    1.71                35
 04/10/2021   00:04:04   (  70.01, 175.16) 04/10/2021   00:04:47  (  70.03, 175.10)    3.45                43
 04/12/2021   14:41:31   (  70.44, -43.61) 04/12/2021   14:40:20  (  70.50, -44.48)   32.75                71
 04/12/2021   15:31:06   ( -70.07, 123.47) 04/12/2021   15:30:56  ( -70.10, 123.46)    3.39                10
 04/12/2021   16:20:33   (  69.95, -69.04) 04/12/2021   16:21:40  (  69.97, -69.04)    2.47                67
 04/15/2021   06:58:04   (  70.17,  71.86) 04/15/2021   06:57:08  (  70.18,  71.79)    2.96                56
 04/15/2021   07:47:34   ( -70.07,-120.65) 04/15/2021   07:47:49  ( -70.04,-120.67)    3.04                15
 04/15/2021   08:37:13   (  69.29,  45.93) 04/15/2021   08:38:21  (  69.28,  47.74)   71.08                68
 04/17/2021   23:14:32   (  70.10,-172.35) 04/17/2021   23:14:00  (  70.13,-172.35)    2.68                32
 04/18/2021   00:04:02   ( -70.01,  -4.86) 04/18/2021   00:04:41  ( -69.98,  -4.81)    2.83                39