Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2020 4 13.  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)
 04/14/2020   22:24:57   ( -70.46,  20.52) 04/14/2020   22:23:45  ( -70.47,  19.72)   29.69                72
 04/14/2020   23:14:29   (  70.08,-172.39) 04/14/2020   23:14:24  (  70.09,-172.38)    1.52                 5
 04/15/2020   00:03:59   ( -69.97,  -4.91) 04/15/2020   00:05:05  ( -69.95,  -4.85)    3.25                66
 04/17/2020   14:41:30   ( -70.19, 136.00) 04/17/2020   14:40:35  ( -70.19, 135.93)    2.80                55
 04/17/2020   15:30:57   (  70.08, -56.51) 04/17/2020   15:31:19  (  70.08, -56.59)    2.80                22
 04/17/2020   16:20:40   ( -69.26, 110.01) 04/17/2020   16:21:47  ( -69.25, 111.95)   76.63                67
 04/20/2020   06:57:58   ( -70.14,-108.20) 04/20/2020   06:57:28  ( -70.12,-108.20)    1.67                30
 04/20/2020   07:47:25   (  70.02,  59.28) 04/20/2020   07:48:12  (  70.01,  59.28)    0.85                47
 04/22/2020   22:24:55   (  70.29,-159.73) 04/22/2020   22:23:43  (  70.32,-160.04)   11.96                72
 04/22/2020   23:14:27   ( -70.09,   7.60) 04/22/2020   23:14:23  ( -70.11,   7.59)    3.16                 4
 04/23/2020   00:03:54   (  69.96, 175.08) 04/23/2020   00:05:06  (  69.95, 175.14)    2.71                72
 04/25/2020   14:41:25   (  70.18, -44.02) 04/25/2020   14:40:35  (  70.15, -44.02)    2.42                50
 04/25/2020   15:30:56   ( -70.03, 123.40) 04/25/2020   15:31:17  ( -70.05, 123.46)    3.46                21