Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 27.  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   (  70.43, -43.64) 04/28/2021   14:40:11  (  70.46, -44.38)   27.66                72
 04/28/2021   15:30:57   ( -70.10, 123.51) 04/28/2021   15:30:48  ( -70.11, 123.48)    1.39                 9
 04/28/2021   16:20:24   (  70.00, -68.99) 04/28/2021   16:21:32  (  69.99, -69.03)    1.70                68
 05/01/2021   06:57:55   (  70.18,  71.87) 05/01/2021   06:56:59  (  70.16,  71.86)    2.19                56
 05/01/2021   07:47:25   ( -70.07,-120.66) 05/01/2021   07:47:41  ( -70.07,-120.68)    0.93                16
 05/01/2021   08:37:04   (  69.24,  45.86) 05/01/2021   08:38:11  (  69.26,  47.81)   76.75                67
 05/03/2021   23:14:22   (  70.13,-172.32) 05/03/2021   23:13:51  (  70.13,-172.31)    1.13                31
 05/04/2021   00:03:52   ( -70.03,  -4.83) 05/04/2021   00:04:33  ( -70.03,  -4.85)    0.62                41
 05/06/2021   14:41:18   ( -70.47, 136.41) 05/06/2021   14:40:06  ( -70.51, 135.55)   32.09                72
 05/06/2021   15:30:50   (  70.09, -56.51) 05/06/2021   15:30:44  (  70.09, -56.48)    1.38                 6
 05/06/2021   16:20:20   ( -69.98, 110.98) 05/06/2021   16:21:26  ( -70.00, 110.99)    1.63                66
 05/09/2021   06:57:51   ( -70.15,-108.18) 05/09/2021   06:56:53  ( -70.17,-108.12)    3.14                58
 05/09/2021   07:47:17   (  70.09,  59.38) 05/09/2021   07:47:37  (  70.06,  59.34)    2.61                20