Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 2 20.  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)
 02/20/2021   23:14:57   ( -70.09,   7.67) 02/20/2021   23:14:16  ( -70.09,   7.65)    1.18                41
 02/21/2021   00:04:24   (  69.99, 175.17) 02/21/2021   00:05:00  (  69.98, 175.13)    2.02                36
 02/23/2021   14:41:47   (  70.59, -43.35) 02/23/2021   14:40:37  (  70.66, -44.80)   54.17                70
 02/23/2021   15:31:25   ( -70.04, 123.48) 02/23/2021   15:31:09  ( -70.05, 123.49)    1.11                16
 02/23/2021   16:20:52   (  69.94, -69.02) 02/23/2021   16:21:53  (  69.93, -69.03)    0.51                61
 02/26/2021   06:58:24   (  70.10,  71.81) 02/26/2021   06:57:21  (  70.10,  71.87)    2.29                63
 02/26/2021   07:47:54   ( -69.99,-120.72) 02/26/2021   07:48:03  ( -70.00,-120.67)    2.60                 9
 02/26/2021   08:37:29   (  69.44,  46.18) 02/26/2021   08:38:38  (  69.41,  47.51)   51.92                69
 02/28/2021   23:14:52   (  70.09,-172.32) 02/28/2021   23:14:16  (  70.11,-172.38)    3.04                36
 03/01/2021   00:04:22   ( -69.98,  -4.84) 03/01/2021   00:04:57  ( -69.96,  -4.84)    2.32                35
 03/03/2021   14:41:45   ( -70.63, 136.70) 03/03/2021   14:40:35  ( -70.65, 135.23)   54.50                70
 03/03/2021   15:31:21   (  70.03, -56.53) 03/03/2021   15:31:09  (  70.02, -56.47)    2.40                12
 03/03/2021   16:20:51   ( -69.92, 110.96) 03/03/2021   16:21:51  ( -69.92, 110.99)    1.40                60