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   03:14:47   (  70.80, 126.64) 12/20/2017   03:15:55  (  70.71, 128.33)   62.78                68
 12/20/2017   04:05:15   ( -70.08, -64.88) 12/20/2017   04:05:34  ( -70.10, -64.93)    3.32                19
 12/20/2017   04:55:57   (  69.97, 102.60) 12/20/2017   04:55:01  (  70.00, 102.57)    3.20                56
 12/22/2017   21:10:20   (  70.21,-141.35) 12/22/2017   21:11:26  (  70.20,-141.27)    3.12                66
 12/22/2017   22:01:00   ( -70.11,  26.14) 12/22/2017   22:00:56  ( -70.09,  26.21)    3.35                 4
 12/22/2017   22:51:38   (  69.79,-166.08) 12/22/2017   22:50:25  (  69.87,-166.45)   16.72                73
 12/25/2017   15:06:04   (  70.14, -50.17) 12/25/2017   15:06:50  (  70.12, -50.23)    2.60                46
 12/25/2017   15:56:44   ( -70.03, 117.31) 12/25/2017   15:56:20  ( -70.01, 117.26)    2.73                24
 12/28/2017   08:11:25   ( -71.15,-128.07) 12/28/2017   08:12:31  ( -71.02,-125.37)   98.21                66
 12/28/2017   09:01:49   (  70.12,  40.92) 12/28/2017   09:02:13  (  70.09,  40.89)    3.03                24
 12/28/2017   09:52:29   ( -70.00,-151.59) 12/28/2017   09:51:43  ( -69.99,-151.63)    2.39                46
 12/31/2017   02:06:55   ( -70.34, -35.68) 12/31/2017   02:08:07  ( -70.28, -35.34)   14.53                72
 12/31/2017   02:57:34   (  70.09, 132.01) 12/31/2017   02:57:35  (  70.11, 132.07)    2.72                 1
 12/31/2017   03:48:14   ( -69.98, -60.49) 12/31/2017   03:47:06  ( -69.95, -60.52)    3.05                68