Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 8 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)
 08/21/2021   06:08:57   ( -70.73, -94.84) 08/21/2021   06:07:48  ( -70.78, -96.68)   67.73                69
 08/21/2021   06:58:35   (  70.02,  71.77) 08/21/2021   06:58:20  (  70.02,  71.82)    1.91                15
 08/21/2021   07:48:05   ( -69.92,-120.75) 08/21/2021   07:49:02  ( -69.94,-120.74)    2.93                57
 08/23/2021   22:25:38   ( -70.12,  20.14) 08/23/2021   22:24:32  ( -70.11,  20.14)    0.45                66
 08/23/2021   23:15:05   (  70.01,-172.37) 08/23/2021   23:15:16  (  69.99,-172.36)    1.91                11
 08/24/2021   00:04:41   ( -69.57,  -5.34) 08/24/2021   00:05:52  ( -69.59,  -4.45)   34.71                71
 08/26/2021   14:42:08   ( -70.10, 135.99) 08/26/2021   14:41:28  ( -70.08, 135.96)    2.59                40
 08/26/2021   15:31:35   (  69.99, -56.52) 08/26/2021   15:32:12  (  69.96, -56.55)    3.22                37
 08/29/2021   06:09:00   (  70.56,  84.92) 08/29/2021   06:07:50  (  70.62,  83.57)   50.40                70
 08/29/2021   06:58:38   ( -70.03,-108.23) 08/29/2021   06:58:23  ( -70.05,-108.22)    2.64                15
 08/29/2021   07:48:05   (  69.91,  59.25) 08/29/2021   07:49:07  (  69.94,  59.26)    2.75                62
 08/31/2021   22:25:38   (  70.10,-159.88) 08/31/2021   22:24:37  (  70.12,-159.88)    2.16                61
 08/31/2021   23:15:08   ( -70.00,   7.62) 08/31/2021   23:15:19  ( -70.02,   7.59)    2.35                11
 09/01/2021   00:04:44   (  69.39, 174.42) 09/01/2021   00:05:53  (  69.38, 175.84)   55.70                69