Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 3 3.  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)
 03/03/2021   14:41:45   ( -70.59, 136.64) 03/03/2021   14:40:35  ( -70.67, 135.19)   54.22                70
 03/03/2021   15:31:20   (  70.05, -56.50) 03/03/2021   15:31:09  (  70.03, -56.49)    2.83                11
 03/03/2021   16:20:50   ( -69.94, 110.97) 03/03/2021   16:21:51  ( -69.95, 110.96)    1.22                61
 03/06/2021   06:58:21   ( -70.14,-108.14) 03/06/2021   06:57:19  ( -70.11,-108.15)    2.65                62
 03/06/2021   07:47:49   (  69.98,  59.28) 03/06/2021   07:48:03  (  69.99,  59.34)    2.84                14
 03/06/2021   08:37:27   ( -69.42,-133.85) 03/06/2021   08:38:36  ( -69.43,-132.51)   52.05                69
 03/08/2021   23:14:49   ( -70.06,   7.63) 03/08/2021   23:14:12  ( -70.08,   7.68)    2.62                37
 03/09/2021   00:04:16   (  69.95, 175.12) 03/09/2021   00:04:56  (  69.96, 175.16)    1.63                40
 03/11/2021   14:41:42   (  70.42, -43.61) 03/11/2021   14:40:31  (  70.50, -44.53)   35.75                71
 03/11/2021   15:31:17   ( -70.03, 123.47) 03/11/2021   15:31:06  ( -70.05, 123.50)    1.56                11
 03/11/2021   16:20:44   (  69.92, -69.04) 03/11/2021   16:21:50  (  69.93, -69.02)    0.91                66
 03/14/2021   06:58:15   (  70.11,  71.83) 03/14/2021   06:57:18  (  70.11,  71.86)    1.24                57
 03/14/2021   07:47:45   ( -70.00,-120.69) 03/14/2021   07:48:00  ( -70.02,-120.69)    1.52                15
 03/14/2021   08:37:24   (  69.23,  45.90) 03/14/2021   08:38:31  (  69.21,  47.80)   74.82                67
 03/16/2021   23:14:43   (  70.07,-172.35) 03/16/2021   23:14:12  (  70.08,-172.33)    1.77                31
 03/17/2021   00:04:13   ( -69.97,  -4.86) 03/17/2021   00:04:54  ( -69.99,  -4.87)    2.73                41