Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 2 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)
 02/20/2021   23:14:57   ( -70.07,   7.65) 02/20/2021   23:14:15  ( -70.05,   7.71)    3.36                42
 02/21/2021   00:04:24   (  69.98, 175.16) 02/21/2021   00:05:00  (  69.99, 175.11)    2.36                36
 02/23/2021   14:41:48   (  70.58, -43.37) 02/23/2021   14:40:38  (  70.68, -44.82)   54.71                70
 02/23/2021   15:31:25   ( -70.03, 123.46) 02/23/2021   15:31:09  ( -70.06, 123.47)    3.44                16
 02/23/2021   16:20:52   (  69.92, -69.04) 02/23/2021   16:21:53  (  69.95, -69.05)    2.40                61
 02/26/2021   06:58:24   (  70.09,  71.79) 02/26/2021   06:57:21  (  70.11,  71.85)    3.29                63
 02/26/2021   07:47:53   ( -70.03,-120.65) 02/26/2021   07:48:03  ( -70.01,-120.69)    2.28                10
 02/26/2021   08:37:29   (  69.43,  46.17) 02/26/2021   08:38:38  (  69.42,  47.49)   51.72                69
 02/28/2021   23:14:52   (  70.08,-172.33) 02/28/2021   23:14:15  (  70.07,-172.32)    1.59                37
 03/01/2021   00:04:22   ( -69.97,  -4.85) 03/01/2021   00:04:57  ( -69.97,  -4.85)    0.24                35
 03/03/2021   14:41:45   ( -70.62, 136.69) 03/03/2021   14:40:35  ( -70.66, 135.21)   54.89                70
 03/03/2021   15:31:21   (  70.02, -56.54) 03/03/2021   15:31:09  (  70.03, -56.49)    2.42                12
 03/03/2021   16:20:51   ( -69.91, 110.95) 03/03/2021   16:21:51  ( -69.93, 110.98)    2.46                60