Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 13.  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   (  70.46,  84.76) 09/14/2021   06:07:56  (  70.55,  83.66)   41.83                71
 09/14/2021   06:58:43   ( -70.02,-108.25) 09/14/2021   06:58:30  ( -70.04,-108.22)    2.36                13
 09/14/2021   07:48:10   (  69.92,  59.25) 09/14/2021   07:49:14  (  69.92,  59.27)    0.63                64
 09/16/2021   22:25:43   (  70.11,-159.88) 09/16/2021   22:24:44  (  70.12,-159.89)    1.64                59
 09/16/2021   23:15:13   ( -69.99,   7.59) 09/16/2021   23:15:25  ( -69.97,   7.65)    3.40                12
 09/17/2021   00:04:51   (  69.28, 174.27) 09/17/2021   00:05:59  (  69.33, 175.91)   64.59                68
 09/19/2021   14:42:12   (  70.07, -44.05) 09/19/2021   14:41:38  (  70.06, -44.03)    1.57                34
 09/19/2021   15:31:42   ( -69.96, 123.43) 09/19/2021   15:32:20  ( -69.96, 123.44)    0.50                38
 09/22/2021   06:09:09   ( -70.47, -95.24) 09/22/2021   06:07:57  ( -70.53, -96.30)   39.82                72
 09/22/2021   06:58:42   (  70.03,  71.78) 09/22/2021   06:58:34  (  70.06,  71.75)    2.65                 8
 09/22/2021   07:48:12   ( -69.93,-120.74) 09/22/2021   07:49:16  ( -69.95,-120.78)    3.08                64
 09/24/2021   22:25:45   ( -70.10,  20.11) 09/24/2021   22:24:45  ( -70.10,  20.14)    1.26                60
 09/24/2021   23:15:12   (  69.99,-172.40) 09/24/2021   23:15:29  (  70.00,-172.39)    1.18                17
 09/25/2021   00:04:52   ( -69.34,  -5.66) 09/25/2021   00:06:01  ( -69.36,  -4.14)   59.65                69