Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 24.  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)
 09/24/2021   22:25:45   ( -70.11,  20.12) 09/24/2021   22:24:45  ( -70.13,  20.10)    2.03                60
 09/24/2021   23:15:12   (  70.02,-172.37) 09/24/2021   23:15:29  (  70.02,-172.42)    1.78                17
 09/25/2021   00:04:52   ( -69.35,  -5.65) 09/25/2021   00:06:01  ( -69.39,  -4.18)   57.74                69
 09/27/2021   14:42:16   ( -70.08, 135.95) 09/27/2021   14:41:40  ( -70.07, 135.96)    0.76                36
 09/27/2021   15:31:43   (  69.98, -56.55) 09/27/2021   15:32:24  (  69.96, -56.57)    1.75                41
 09/30/2021   06:09:11   (  70.48,  84.77) 09/30/2021   06:08:00  (  70.49,  83.76)   37.58                71
 09/30/2021   06:58:47   ( -70.04,-108.23) 09/30/2021   06:58:35  ( -70.02,-108.19)    2.81                12
 09/30/2021   07:48:14   (  69.94,  59.27) 09/30/2021   07:49:19  (  69.91,  59.28)    2.55                65
 10/02/2021   22:25:48   (  70.10,-159.90) 10/02/2021   22:24:49  (  70.12,-159.90)    2.58                59
 10/02/2021   23:15:18   ( -69.99,   7.58) 10/02/2021   23:15:31  ( -70.02,   7.58)    2.90                13
 10/03/2021   00:04:55   (  69.33, 174.32) 10/03/2021   00:06:04  (  69.33, 175.90)   61.79                69
 10/05/2021   14:42:17   (  70.10, -44.02) 10/05/2021   14:41:43  (  70.08, -44.05)    2.99                34
 10/05/2021   15:31:47   ( -70.00, 123.46) 10/05/2021   15:32:25  ( -69.97, 123.43)    3.28                38