Simultaneous Nadir Overpasses (SNOs) between NOAA-20 and LANDSAT-8
TLE Epoch: 2017 12 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-20) NOAA-20 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2017   03:14:51   (  70.43, 127.18) 12/20/2017   03:16:02  (  70.31, 127.74)   24.54                71
 12/20/2017   04:05:27   ( -70.09, -64.97) 12/20/2017   04:05:34  ( -70.09, -64.94)    1.04                 7
 12/20/2017   04:56:09   (  69.98, 102.52) 12/20/2017   04:55:01  (  69.99, 102.56)    2.02                68
 12/22/2017   20:20:45   ( -70.76,  50.20) 12/22/2017   20:21:54  ( -70.62,  51.71)   57.45                69
 12/22/2017   21:11:17   (  70.10,-141.45) 12/22/2017   21:11:29  (  70.08,-141.44)    2.74                12
 12/22/2017   22:01:58   ( -70.00,  26.03) 12/22/2017   22:00:59  ( -69.97,  26.04)    3.09                59
 12/25/2017   13:26:57   (  70.18, -25.48) 12/25/2017   13:27:56  (  70.16, -25.44)    1.88                59
 12/25/2017   14:17:38   ( -70.04, 142.05) 12/25/2017   14:17:26  ( -70.06, 142.04)    2.04                12
 12/25/2017   15:08:11   (  69.41, -49.71) 12/25/2017   15:07:02  (  69.45, -51.15)   56.27                69
 12/28/2017   05:43:13   (  70.31,  90.27) 12/28/2017   05:44:24  (  70.24,  90.55)   12.69                71
 12/28/2017   06:33:53   ( -70.09,-102.08) 12/28/2017   06:33:55  ( -70.08,-102.05)    1.25                 2
 12/28/2017   07:24:35   (  69.92,  65.48) 12/28/2017   07:23:23  (  69.92,  65.36)    4.54                72
 12/30/2017   21:59:57   (  70.13,-153.66) 12/30/2017   22:00:55  (  70.15,-153.71)    3.12                58
 12/30/2017   22:50:40   ( -70.04,  13.79) 12/30/2017   22:50:25  ( -70.05,  13.78)    1.32                15
 12/30/2017   23:41:11   (  69.27,-177.77) 12/30/2017   23:40:03  (  69.33,-179.56)   70.56                68