Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 28.  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)
 04/28/2021   14:41:23   (  70.41, -43.67) 04/28/2021   14:40:11  (  70.48, -44.42)   28.58                72
 04/28/2021   15:30:57   ( -70.08, 123.48) 04/28/2021   15:30:47  ( -70.08, 123.53)    1.77                10
 04/28/2021   16:20:24   (  69.98, -69.02) 04/28/2021   16:21:31  (  69.96, -68.98)    2.47                67
 05/01/2021   06:57:55   (  70.16,  71.83) 05/01/2021   06:56:59  (  70.18,  71.83)    2.71                56
 05/01/2021   07:47:25   ( -70.05,-120.69) 05/01/2021   07:47:40  ( -70.04,-120.64)    2.03                15
 05/01/2021   08:37:04   (  69.27,  45.91) 05/01/2021   08:38:11  (  69.23,  47.85)   76.76                67
 05/03/2021   23:14:22   (  70.17,-172.27) 05/03/2021   23:13:52  (  70.15,-172.34)    3.58                30
 05/04/2021   00:03:53   ( -70.01,  -4.86) 05/04/2021   00:04:33  ( -70.01,  -4.81)    2.27                40
 05/06/2021   14:41:18   ( -70.45, 136.38) 05/06/2021   14:40:06  ( -70.54, 135.51)   33.80                72
 05/06/2021   15:30:49   (  70.12, -56.46) 05/06/2021   15:30:44  (  70.12, -56.52)    2.45                 5
 05/06/2021   16:20:20   ( -69.96, 110.95) 05/06/2021   16:21:25  ( -69.97, 111.02)    3.00                65
 05/09/2021   06:57:50   ( -70.18,-108.13) 05/09/2021   06:56:53  ( -70.20,-108.17)    2.13                57
 05/09/2021   07:47:17   (  70.07,  59.35) 05/09/2021   07:47:36  (  70.04,  59.38)    2.98                19
 05/09/2021   08:36:58   ( -69.36,-133.99) 05/09/2021   08:38:07  ( -69.36,-132.30)   66.13                69
 05/11/2021   23:14:18   ( -70.13,   7.67) 05/11/2021   23:13:45  ( -70.12,   7.73)    2.72                33
 05/12/2021   00:03:45   (  70.01, 175.15) 05/12/2021   00:04:29  (  70.02, 175.19)    2.22                44