Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 21.  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)
 09/22/2021   06:09:09   ( -70.50, -95.19) 09/22/2021   06:07:58  ( -70.55, -96.33)   42.56                71
 09/22/2021   06:58:43   (  70.02,  71.76) 09/22/2021   06:58:34  (  70.02,  71.81)    2.13                 9
 09/22/2021   07:48:13   ( -69.90,-120.77) 09/22/2021   07:49:16  ( -69.92,-120.73)    2.50                63
 09/24/2021   22:25:44   ( -70.13,  20.15) 09/24/2021   22:24:45  ( -70.12,  20.11)    2.25                59
 09/24/2021   23:15:11   (  70.03,-172.35) 09/24/2021   23:15:29  (  70.01,-172.41)    3.46                18
 09/25/2021   00:04:51   ( -69.37,  -5.62) 09/25/2021   00:06:00  ( -69.33,  -4.10)   59.88                69
 09/27/2021   14:42:14   ( -70.09, 135.97) 09/27/2021   14:41:40  ( -70.06, 135.97)    3.06                34
 09/27/2021   15:31:41   (  69.99, -56.53) 09/27/2021   15:32:24  (  69.96, -56.56)    3.26                43
 09/30/2021   06:09:10   (  70.37,  84.62) 09/30/2021   06:07:59  (  70.43,  83.85)   29.50                71
 09/30/2021   06:58:44   ( -70.04,-108.21) 09/30/2021   06:58:36  ( -70.06,-108.25)    2.58                 8
 09/30/2021   07:48:11   (  69.93,  59.28) 09/30/2021   07:49:19  (  69.91,  59.29)    3.09                68
 10/02/2021   22:25:44   (  70.09,-159.89) 10/02/2021   22:24:49  (  70.12,-159.88)    2.60                55
 10/02/2021   23:15:14   ( -69.99,   7.59) 10/02/2021   23:15:31  ( -70.01,   7.60)    2.20                17
 10/03/2021   00:04:54   (  69.16, 174.11) 10/03/2021   00:06:01  (  69.17, 176.14)   80.01                67