Simultaneous Nadir Overpasses (SNOs) between NOAA-20 and LANDSAT-8
TLE Epoch: 2017 12 31.  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)
 01/02/2018   15:06:11   ( -70.16, 129.76) 01/02/2018   15:06:47  ( -70.16, 129.83)    2.88                36
 01/02/2018   15:56:54   (  70.00, -62.69) 01/02/2018   15:56:15  (  70.01, -62.75)    2.18                39
 01/05/2018   06:32:29   (  70.64,  77.45) 01/05/2018   06:33:39  (  70.56,  78.65)   45.37                70
 01/05/2018   07:23:03   ( -70.12,-114.41) 01/05/2018   07:23:15  ( -70.11,-114.36)    2.17                12
 01/05/2018   08:13:46   (  69.96,  53.14) 01/05/2018   08:12:43  (  69.95,  53.06)    2.96                63
 01/07/2018   22:49:14   (  70.18,-166.05) 01/07/2018   22:50:14  (  70.17,-166.03)    1.44                60
 01/07/2018   23:39:56   ( -70.08,   1.42) 01/07/2018   23:39:44  ( -70.06,   1.45)    2.18                12
 01/08/2018   00:30:29   (  69.39, 169.74) 01/08/2018   00:29:20  (  69.46, 168.26)   58.26                69
 01/10/2018   15:06:07   (  70.14, -50.22) 01/10/2018   15:06:42  (  70.17, -50.15)    3.59                35
 01/10/2018   15:56:49   ( -70.04, 117.26) 01/10/2018   15:56:12  ( -70.06, 117.33)    3.64                37
 01/13/2018   06:32:27   ( -70.78,-102.76) 01/13/2018   06:33:36  ( -70.65,-101.20)   59.08                69
 01/13/2018   07:23:00   (  70.10,  65.61) 01/13/2018   07:23:11  (  70.10,  65.64)    1.15                11
 01/13/2018   08:13:42   ( -70.00,-126.91) 01/13/2018   08:12:41  ( -70.00,-126.88)    1.31                61