Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 12.  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)
 09/14/2021   06:09:07   (  70.48,  84.79) 09/14/2021   06:07:56  (  70.53,  83.69)   40.93                71
 09/14/2021   06:58:43   ( -70.04,-108.22) 09/14/2021   06:58:30  ( -70.02,-108.18)    3.02                13
 09/14/2021   07:48:10   (  69.94,  59.28) 09/14/2021   07:49:15  (  69.96,  59.22)    2.99                65
 09/16/2021   22:25:42   (  70.12,-159.85) 09/16/2021   22:24:43  (  70.10,-159.86)    2.84                59
 09/16/2021   23:15:12   ( -70.01,   7.62) 09/16/2021   23:15:25  ( -70.00,   7.61)    1.50                13
 09/17/2021   00:04:50   (  69.30, 174.29) 09/17/2021   00:05:58  (  69.31, 175.94)   64.56                68
 09/19/2021   14:42:12   (  70.09, -44.02) 09/19/2021   14:41:39  (  70.09, -44.07)    1.90                33
 09/19/2021   15:31:42   ( -69.98, 123.46) 09/19/2021   15:32:21  ( -69.99, 123.40)    2.49                39
 09/22/2021   06:09:09   ( -70.49, -95.21) 09/22/2021   06:07:58  ( -70.55, -96.34)   42.56                71
 09/22/2021   06:58:42   (  70.05,  71.80) 09/22/2021   06:58:34  (  70.03,  71.79)    2.02                 8
 09/22/2021   07:48:12   ( -69.94,-120.71) 09/22/2021   07:49:16  ( -69.93,-120.74)    2.14                64
 09/24/2021   22:25:45   ( -70.12,  20.13) 09/24/2021   22:24:46  ( -70.13,  20.10)    1.60                59
 09/24/2021   23:15:12   (  70.00,-172.38) 09/24/2021   23:15:29  (  69.97,-172.36)    3.35                17
 09/25/2021   00:04:52   ( -69.35,  -5.64) 09/25/2021   00:06:01  ( -69.34,  -4.11)   60.30                69