Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 12.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2022   17:40:21   ( -70.62,  90.63) 12/14/2022   17:41:32  ( -70.51,  91.72)   42.16                71
 12/14/2022   18:30:57   (  70.09,-101.23) 12/14/2022   18:31:05  (  70.08,-101.26)    1.32                 8
 12/14/2022   19:21:30   ( -70.03,  66.22) 12/14/2022   19:20:34  ( -70.02,  66.29)    3.04                56
 12/17/2022   14:04:24   (  70.17, -34.71) 12/17/2022   14:05:16  (  70.14, -34.72)    3.06                52
 12/17/2022   14:54:57   ( -70.10, 132.76) 12/17/2022   14:54:45  ( -70.09, 132.83)    3.04                12
 12/17/2022   15:45:30   (  69.42, -58.93) 12/17/2022   15:44:21  (  69.48, -60.36)   56.16                69
 12/20/2022   09:38:07   (  71.07,  30.49) 12/20/2022   09:39:13  (  71.01,  33.01)   91.59                66
 12/20/2022   10:28:24   ( -70.13,-160.65) 12/20/2022   10:28:57  ( -70.13,-160.66)    0.79                33
 12/20/2022   11:19:07   (  70.00,   6.86) 12/20/2022   11:18:24  (  70.02,   6.83)    2.39                43
 12/23/2022   06:01:55   ( -70.38, -94.40) 12/23/2022   06:03:06  ( -70.32, -93.94)   18.58                71
 12/23/2022   06:52:34   (  70.07,  73.39) 12/23/2022   06:52:35  (  70.10,  73.38)    2.42                 1
 12/23/2022   07:43:08   ( -70.01,-119.15) 12/23/2022   07:42:05  ( -69.99,-119.13)    1.74                63
 12/26/2022   02:26:00   (  70.17, 139.90) 12/26/2022   02:26:45  (  70.15, 139.91)    2.06                45