Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 22.  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   ( -70.49, -95.21) 09/22/2021   06:07:58  ( -70.56, -96.35)   42.93                71
 09/22/2021   06:58:43   (  70.01,  71.74) 09/22/2021   06:58:34  (  70.03,  71.80)    2.65                 9
 09/22/2021   07:48:12   ( -69.95,-120.71) 09/22/2021   07:49:16  ( -69.93,-120.75)    2.19                64
 09/24/2021   22:25:45   ( -70.12,  20.14) 09/24/2021   22:24:46  ( -70.13,  20.09)    1.95                59
 09/24/2021   23:15:12   (  70.02,-172.36) 09/24/2021   23:15:30  (  70.02,-172.43)    2.59                18
 09/25/2021   00:04:52   ( -69.36,  -5.64) 09/25/2021   00:06:01  ( -69.34,  -4.11)   59.77                69
 09/27/2021   14:42:14   ( -70.08, 135.95) 09/27/2021   14:41:40  ( -70.08, 135.95)    0.13                34
 09/27/2021   15:31:41   (  69.97, -56.55) 09/27/2021   15:32:24  (  69.97, -56.58)    1.16                43
 09/30/2021   06:09:10   (  70.35,  84.60) 09/30/2021   06:07:58  (  70.39,  83.92)   25.88                72
 09/30/2021   06:58:44   ( -70.03,-108.24) 09/30/2021   06:58:35  ( -70.02,-108.20)    1.65                 9
 09/30/2021   07:48:11   (  69.92,  59.26) 09/30/2021   07:49:19  (  69.92,  59.27)    0.51                68
 10/02/2021   22:25:43   (  70.13,-159.84) 10/02/2021   22:24:49  (  70.13,-159.91)    2.54                54
 10/02/2021   23:15:13   ( -70.02,   7.64) 10/02/2021   23:15:31  ( -70.02,   7.57)    2.60                18
 10/03/2021   00:04:54   (  69.14, 174.09) 10/03/2021   00:06:01  (  69.18, 176.11)   80.27                67
 10/05/2021   14:42:13   (  70.06, -44.05) 10/05/2021   14:41:44  (  70.09, -44.07)    2.53                29
 10/05/2021   15:31:43   ( -69.96, 123.44) 10/05/2021   15:32:26  ( -69.98, 123.42)    1.87                43