Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2020 4 17.  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   ( -70.19, 136.00) 04/17/2020   14:40:35  ( -70.18, 135.94)    2.21                55
 04/17/2020   15:30:56   (  70.08, -56.51) 04/17/2020   15:31:18  (  70.07, -56.57)    2.63                22
 04/17/2020   16:20:39   ( -69.26, 110.00) 04/17/2020   16:21:46  ( -69.24, 111.96)   77.28                67
 04/20/2020   06:57:58   ( -70.13,-108.21) 04/20/2020   06:57:28  ( -70.12,-108.19)    1.55                30
 04/20/2020   07:47:25   (  70.02,  59.27) 04/20/2020   07:48:12  (  70.00,  59.30)    1.65                47
 04/22/2020   22:24:55   (  70.28,-159.76) 04/22/2020   22:23:43  (  70.31,-160.03)   10.71                72
 04/22/2020   23:14:26   ( -70.12,   7.65) 04/22/2020   23:14:23  ( -70.11,   7.60)    2.49                 3
 04/23/2020   00:03:54   (  69.95, 175.06) 04/23/2020   00:05:06  (  69.94, 175.16)    3.97                72
 04/25/2020   14:41:25   (  70.15, -44.06) 04/25/2020   14:40:35  (  70.14, -44.00)    2.28                50
 04/25/2020   15:30:55   ( -70.05, 123.44) 04/25/2020   15:31:17  ( -70.05, 123.47)    1.45                22
 04/28/2020   06:57:52   (  70.13,  71.79) 04/28/2020   06:57:29  (  70.14,  71.78)    1.52                23
 04/28/2020   07:47:22   ( -70.04,-120.71) 04/28/2020   07:48:11  ( -70.04,-120.75)    1.63                49
 04/30/2020   22:24:53   ( -70.23,  20.17) 04/30/2020   22:23:40  ( -70.24,  20.08)    3.35                73
 04/30/2020   23:14:20   (  70.11,-172.36) 04/30/2020   23:14:23  (  70.09,-172.37)    1.83                 3
 05/01/2020   00:03:51   ( -69.96,  -4.94) 05/01/2020   00:05:04  ( -69.93,  -4.81)    5.67                73