Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 2 17.  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)
 02/18/2021   06:58:28   ( -70.10,-108.19) 02/18/2021   06:57:21  ( -70.12,-108.16)    1.80                67
 02/18/2021   07:47:55   (  70.01,  59.32) 02/18/2021   07:48:05  (  70.00,  59.32)    0.23                10
 02/18/2021   08:37:30   ( -69.61,-133.59) 02/18/2021   08:38:41  ( -69.60,-132.75)   32.41                71
 02/20/2021   23:14:57   ( -70.06,   7.63) 02/20/2021   23:14:15  ( -70.07,   7.69)    2.35                42
 02/21/2021   00:04:24   (  69.96, 175.13) 02/21/2021   00:04:59  (  69.95, 175.17)    1.33                35
 02/23/2021   14:41:47   (  70.61, -43.31) 02/23/2021   14:40:37  (  70.64, -44.76)   53.53                70
 02/23/2021   15:31:25   ( -70.06, 123.52) 02/23/2021   15:31:10  ( -70.07, 123.45)    2.71                15
 02/23/2021   16:20:53   (  69.90, -69.06) 02/23/2021   16:21:53  (  69.91, -68.99)    2.73                60
 02/26/2021   06:58:24   (  70.12,  71.84) 02/26/2021   06:57:22  (  70.12,  71.83)    0.83                62
 02/26/2021   07:47:54   ( -70.01,-120.68) 02/26/2021   07:48:04  ( -70.03,-120.71)    2.23                10
 02/26/2021   08:37:30   (  69.40,  46.14) 02/26/2021   08:38:39  (  69.44,  47.47)   52.09                69
 02/28/2021   23:14:52   (  70.06,-172.37) 02/28/2021   23:14:15  (  70.08,-172.34)    3.02                37
 03/01/2021   00:04:21   ( -70.01,  -4.80) 03/01/2021   00:04:57  ( -69.98,  -4.87)    3.61                36