Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 9.  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)
 09/11/2021   14:42:13   ( -70.07, 135.94) 09/11/2021   14:41:35  ( -70.08, 135.94)    1.87                38
 09/11/2021   15:31:40   (  69.96, -56.56) 09/11/2021   15:32:19  (  69.97, -56.57)    0.61                39
 09/14/2021   06:09:07   (  70.48,  84.79) 09/14/2021   06:07:56  (  70.53,  83.69)   41.02                71
 09/14/2021   06:58:43   ( -70.05,-108.21) 09/14/2021   06:58:31  ( -70.07,-108.26)    2.99                12
 09/14/2021   07:48:10   (  69.94,  59.28) 09/14/2021   07:49:15  (  69.96,  59.22)    3.11                65
 09/16/2021   22:25:42   (  70.12,-159.85) 09/16/2021   22:24:43  (  70.10,-159.86)    2.71                59
 09/16/2021   23:15:12   ( -70.02,   7.63) 09/16/2021   23:15:25  ( -70.00,   7.61)    2.16                13
 09/17/2021   00:04:50   (  69.30, 174.30) 09/17/2021   00:05:58  (  69.31, 175.94)   64.45                68
 09/19/2021   14:42:12   (  70.09, -44.02) 09/19/2021   14:41:39  (  70.09, -44.08)    2.07                33
 09/19/2021   15:31:42   ( -69.99, 123.46) 09/19/2021   15:32:21  ( -69.99, 123.40)    2.48                39
 09/22/2021   06:09:09   ( -70.49, -95.20) 09/22/2021   06:07:58  ( -70.55, -96.34)   42.62                71
 09/22/2021   06:58:42   (  70.05,  71.80) 09/22/2021   06:58:34  (  70.03,  71.78)    1.77                 8
 09/22/2021   07:48:12   ( -69.95,-120.71) 09/22/2021   07:49:16  ( -69.93,-120.74)    2.53                64