Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 17.  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)
 09/19/2021   14:42:13   (  70.07, -44.06) 09/19/2021   14:41:39  (  70.06, -44.03)    0.96                34
 09/19/2021   15:31:43   ( -69.95, 123.42) 09/19/2021   15:32:21  ( -69.97, 123.43)    1.75                38
 09/22/2021   06:09:08   ( -70.52, -95.17) 09/22/2021   06:07:57  ( -70.53, -96.31)   42.26                71
 09/22/2021   06:58:42   (  70.03,  71.77) 09/22/2021   06:58:33  (  70.01,  71.83)    3.35                 9
 09/22/2021   07:48:12   ( -69.92,-120.75) 09/22/2021   07:49:15  ( -69.91,-120.71)    2.12                63
 09/24/2021   22:25:45   ( -70.09,  20.10) 09/24/2021   22:24:45  ( -70.11,  20.13)    2.02                60
 09/24/2021   23:15:12   (  69.99,-172.41) 09/24/2021   23:15:29  (  70.00,-172.40)    1.88                17
 09/25/2021   00:04:52   ( -69.33,  -5.67) 09/25/2021   00:06:00  ( -69.32,  -4.08)   62.73                68
 09/27/2021   14:42:15   ( -70.05, 135.92) 09/27/2021   14:41:40  ( -70.05, 135.99)    2.89                35
 09/27/2021   15:31:42   (  69.94, -56.59) 09/27/2021   15:32:24  (  69.95, -56.55)    2.15                42
 09/30/2021   06:09:11   (  70.32,  84.56) 09/30/2021   06:07:59  (  70.42,  83.87)   27.99                72
 09/30/2021   06:58:44   ( -70.05,-108.19) 09/30/2021   06:58:36  ( -70.05,-108.23)    1.66                 8
 09/30/2021   07:48:11   (  69.94,  59.29) 09/30/2021   07:49:20  (  69.95,  59.22)    2.79                69