Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2020 4 16.  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)
 04/17/2020   14:41:30   ( -70.17, 135.98) 04/17/2020   14:40:34  ( -70.15, 136.00)    2.91                56
 04/17/2020   15:30:57   (  70.06, -56.54) 04/17/2020   15:31:19  (  70.08, -56.60)    3.19                22
 04/17/2020   16:20:40   ( -69.24, 109.98) 04/17/2020   16:21:47  ( -69.25, 111.94)   77.21                67
 04/20/2020   06:57:59   ( -70.11,-108.23) 04/20/2020   06:57:29  ( -70.13,-108.21)    2.47                30
 04/20/2020   07:47:26   (  70.00,  59.25) 04/20/2020   07:48:13  (  70.02,  59.27)    2.58                47
 04/22/2020   22:24:55   (  70.26,-159.78) 04/22/2020   22:23:42  (  70.27,-159.97)    7.29                73
 04/22/2020   23:14:26   ( -70.10,   7.63) 04/22/2020   23:14:23  ( -70.12,   7.58)    2.94                 3
 04/23/2020   00:03:53   (  69.99, 175.11) 04/23/2020   00:05:06  (  69.96, 175.13)    2.92                73
 04/25/2020   14:41:24   (  70.19, -44.00) 04/25/2020   14:40:35  (  70.16, -44.03)    2.83                49
 04/25/2020   15:30:55   ( -70.04, 123.41) 04/25/2020   15:31:17  ( -70.06, 123.44)    3.17                22
 04/28/2020   06:57:53   (  70.11,  71.77) 04/28/2020   06:57:29  (  70.11,  71.83)    2.36                24
 04/28/2020   07:47:23   ( -70.02,-120.73) 04/28/2020   07:48:11  ( -70.00,-120.70)    2.03                48