Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 12 9.  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)
 12/11/2021   06:09:18   ( -70.17, -95.71) 12/11/2021   06:08:21  ( -70.15, -95.66)    2.75                57
 12/11/2021   06:58:45   (  70.07,  71.79) 12/11/2021   06:59:06  (  70.08,  71.75)    2.17                21
 12/11/2021   07:48:27   ( -69.30,-121.63) 12/11/2021   07:49:35  ( -69.32,-119.80)   71.88                68
 12/13/2021   22:25:47   ( -70.16,  20.15) 12/13/2021   22:25:13  ( -70.15,  20.13)    1.70                34
 12/13/2021   23:15:14   (  70.05,-172.36) 12/13/2021   23:15:57  (  70.03,-172.38)    2.81                43
 12/16/2021   13:52:41   (  70.52, -31.08) 12/16/2021   13:51:30  (  70.60, -32.12)   39.50                71
 12/16/2021   14:42:17   ( -70.08, 135.93) 12/16/2021   14:42:04  ( -70.09, 135.99)    2.60                13
 12/16/2021   15:31:44   (  69.97, -56.59) 12/16/2021   15:32:48  (  69.97, -56.52)    2.54                64
 12/19/2021   06:09:15   (  70.16,  84.28) 12/19/2021   06:08:13  (  70.18,  84.32)    2.29                62
 12/19/2021   06:58:45   ( -70.06,-108.23) 12/19/2021   06:58:55  ( -70.09,-108.23)    3.32                10
 12/19/2021   07:48:21   (  69.45,  58.57) 12/19/2021   07:49:29  (  69.44,  60.04)   57.07                68
 12/21/2021   22:25:44   (  70.13,-159.88) 12/21/2021   22:25:04  (  70.13,-159.83)    2.19                40
 12/21/2021   23:15:14   ( -70.03,   7.61) 12/21/2021   23:15:46  ( -70.04,   7.63)    1.48                32