Simultaneous Nadir Overpasses (SNOs) between NOAA-20 and LANDSAT-8
TLE Epoch: 2021 5 15.  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)
 05/15/2021   21:59:01   (  70.62,-154.26) 05/15/2021   22:00:11  (  70.48,-153.15)   43.82                70
 05/15/2021   22:49:34   ( -70.07,  13.94) 05/15/2021   22:49:46  ( -70.10,  13.92)    3.11                12
 05/15/2021   23:40:19   (  70.00,-178.65) 05/15/2021   23:39:13  (  69.99,-178.58)    2.58                66
 05/18/2021   14:15:48   (  70.15, -37.74) 05/18/2021   14:16:48  (  70.14, -37.77)    1.29                60
 05/18/2021   15:06:30   ( -70.06, 129.71) 05/18/2021   15:06:18  ( -70.03, 129.71)    3.32                12
 05/18/2021   15:57:03   (  69.36, -61.95) 05/18/2021   15:55:54  (  69.43, -63.48)   60.38                69
 05/21/2021   06:32:42   (  70.10,  78.10) 05/21/2021   06:33:18  (  70.13,  78.09)    3.46                36
 05/21/2021   07:23:24   ( -70.01,-114.44) 05/21/2021   07:22:48  ( -70.02,-114.43)    1.63                36
 05/23/2021   21:59:05   ( -70.79,  25.46) 05/23/2021   22:00:14  ( -70.65,  27.09)   61.73                69
 05/23/2021   22:49:38   (  70.10,-166.14) 05/23/2021   22:49:49  (  70.11,-166.06)    2.98                11
 05/23/2021   23:40:19   ( -69.95,   1.40) 05/23/2021   23:39:20  ( -69.95,   1.34)    2.23                59
 05/26/2021   14:15:49   ( -70.16, 142.23) 05/26/2021   14:16:54  ( -70.14, 142.22)    2.10                65
 05/26/2021   15:06:33   (  70.05, -50.30) 05/26/2021   15:06:21  (  70.03, -50.30)    2.35                12
 05/26/2021   15:57:08   ( -69.58, 117.71) 05/26/2021   15:55:56  ( -69.65, 116.81)   35.78                72
 05/29/2021   06:32:44   ( -70.11,-101.93) 05/29/2021   06:33:25  ( -70.12,-101.94)    0.82                41
 05/29/2021   07:23:28   (  70.00,  65.54) 05/29/2021   07:22:52  (  70.00,  65.54)    0.28                36