Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 8.  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)
 09/08/2021   22:25:43   ( -70.10,  20.11) 09/08/2021   22:24:39  ( -70.09,  20.17)    3.10                64
 09/08/2021   23:15:10   (  70.00,-172.39) 09/08/2021   23:15:24  (  70.02,-172.42)    2.29                14
 09/09/2021   00:04:47   ( -69.50,  -5.44) 09/09/2021   00:05:57  ( -69.46,  -4.27)   46.14                70
 09/11/2021   14:42:13   ( -70.09, 135.97) 09/11/2021   14:41:35  ( -70.07, 135.97)    2.35                38
 09/11/2021   15:31:39   (  69.98, -56.54) 09/11/2021   15:32:18  (  69.95, -56.55)    3.47                39
 09/14/2021   06:09:06   (  70.50,  84.82) 09/14/2021   06:07:56  (  70.57,  83.64)   44.19                70
 09/14/2021   06:58:42   ( -70.06,-108.19) 09/14/2021   06:58:30  ( -70.05,-108.23)    2.51                12
 09/14/2021   07:48:09   (  69.96,  59.31) 09/14/2021   07:49:14  (  69.94,  59.25)    3.23                65
 09/16/2021   22:25:43   (  70.09,-159.91) 09/16/2021   22:24:43  (  70.08,-159.83)    3.12                60
 09/16/2021   23:15:13   ( -69.98,   7.58) 09/16/2021   23:15:25  ( -69.98,   7.64)    2.55                12
 09/17/2021   00:04:50   (  69.32, 174.32) 09/17/2021   00:05:58  (  69.29, 175.96)   64.80                68
 09/19/2021   14:42:13   (  70.05, -44.08) 09/19/2021   14:41:39  (  70.07, -44.04)    2.50                34
 09/19/2021   15:31:43   ( -69.95, 123.41) 09/19/2021   15:32:21  ( -69.96, 123.43)    2.05                38