Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 11.  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)
 09/11/2021   14:42:13   ( -70.08, 135.96) 09/11/2021   14:41:35  ( -70.07, 135.96)    1.11                38
 09/11/2021   15:31:40   (  69.98, -56.54) 09/11/2021   15:32:19  (  69.95, -56.55)    3.04                39
 09/14/2021   06:09:06   (  70.50,  84.81) 09/14/2021   06:07:55  (  70.52,  83.72)   40.63                71
 09/14/2021   06:58:42   ( -70.06,-108.19) 09/14/2021   06:58:30  ( -70.05,-108.24)    1.81                12
 09/14/2021   07:48:09   (  69.96,  59.30) 09/14/2021   07:49:14  (  69.94,  59.24)    2.93                65
 09/16/2021   22:25:43   (  70.08,-159.91) 09/16/2021   22:24:43  (  70.09,-159.84)    2.85                60
 09/16/2021   23:15:13   ( -69.98,   7.57) 09/16/2021   23:15:25  ( -69.99,   7.63)    2.63                12
 09/17/2021   00:04:50   (  69.32, 174.32) 09/17/2021   00:05:58  (  69.29, 175.96)   64.58                68
 09/19/2021   14:42:13   (  70.05, -44.08) 09/19/2021   14:41:39  (  70.08, -44.05)    3.38                34
 09/19/2021   15:31:42   ( -70.00, 123.48) 09/19/2021   15:32:21  ( -69.98, 123.42)    3.41                39
 09/22/2021   06:09:09   ( -70.50, -95.19) 09/22/2021   06:07:58  ( -70.54, -96.32)   42.27                71
 09/22/2021   06:58:43   (  70.01,  71.74) 09/22/2021   06:58:34  (  70.02,  71.80)    2.74                 9
 09/22/2021   07:48:13   ( -69.90,-120.77) 09/22/2021   07:49:16  ( -69.92,-120.72)    2.26                63
 09/24/2021   22:25:44   ( -70.13,  20.15) 09/24/2021   22:24:45  ( -70.12,  20.12)    1.84                59
 09/24/2021   23:15:11   (  70.02,-172.36) 09/24/2021   23:15:29  (  70.02,-172.42)    2.31                18
 09/25/2021   00:04:51   ( -69.36,  -5.62) 09/25/2021   00:06:00  ( -69.33,  -4.09)   60.21                69