Simultaneous Nadir Overpasses (SNOs) between NOAA-20 and LANDSAT-8
TLE Epoch: 2017 12 28.  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)
 12/28/2017   06:32:34   ( -70.69,-102.62) 12/28/2017   06:33:44  ( -70.54,-101.37)   48.69                70
 12/28/2017   07:23:09   (  70.10,  65.61) 12/28/2017   07:23:17  (  70.12,  65.65)    2.45                 8
 12/28/2017   08:13:51   ( -70.01,-126.93) 12/28/2017   08:12:47  ( -70.00,-126.88)    2.33                64
 12/30/2017   22:49:17   ( -70.17,  13.97) 12/30/2017   22:50:18  ( -70.18,  13.97)    0.68                61
 12/30/2017   23:40:01   (  70.06,-178.56) 12/30/2017   23:39:45  (  70.08,-178.53)    1.83                16
 12/31/2017   00:30:33   ( -69.44, -10.32) 12/31/2017   00:29:23  ( -69.52, -11.66)   52.89                70
 01/02/2018   15:06:10   ( -70.13, 129.80) 01/02/2018   15:06:47  ( -70.13, 129.79)    0.54                37
 01/02/2018   15:56:54   (  70.02, -62.73) 01/02/2018   15:56:14  (  70.03, -62.71)    0.64                40
 01/05/2018   06:32:30   (  70.66,  77.42) 01/05/2018   06:33:40  (  70.52,  78.60)   46.68                70
 01/05/2018   07:23:03   ( -70.09,-114.36) 01/05/2018   07:23:16  ( -70.08,-114.40)    1.57                13
 01/05/2018   08:13:47   (  69.98,  53.10) 01/05/2018   08:12:43  (  69.97,  53.09)    1.36                64
 01/07/2018   22:49:15   (  70.20,-166.08) 01/07/2018   22:50:14  (  70.19,-166.00)    3.53                59
 01/07/2018   23:39:56   ( -70.04,   1.48) 01/07/2018   23:39:45  ( -70.03,   1.40)    3.47                11
 01/08/2018   00:30:30   (  69.41, 169.71) 01/08/2018   00:29:20  (  69.47, 168.29)   56.05                70
 01/10/2018   15:06:06   (  70.11, -50.17) 01/10/2018   15:06:42  (  70.12, -50.21)    2.14                36
 01/10/2018   15:56:48   ( -70.00, 117.31) 01/10/2018   15:56:12  ( -70.02, 117.28)    2.28                36