Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 8.  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)
 12/09/2022   01:42:44   (  70.15, 150.73) 12/09/2022   01:43:43  (  70.16, 150.69)    1.56                59
 12/09/2022   02:33:16   ( -70.06, -41.77) 12/09/2022   02:33:13  ( -70.04, -41.84)    3.27                 3
 12/09/2022   03:23:55   (  69.66, 126.13) 12/09/2022   03:22:44  (  69.72, 125.36)   30.37                71
 12/11/2022   22:06:45   ( -70.15,  24.73) 12/11/2022   22:07:25  ( -70.15,  24.75)    0.83                40
 12/11/2022   22:57:29   (  70.02,-167.77) 12/11/2022   22:56:52  (  70.04,-167.75)    2.41                37
 12/11/2022   23:47:44   ( -69.02,   1.03) 12/11/2022   23:46:38  ( -69.05,  -1.46)   98.96                66
 12/14/2022   17:40:21   ( -70.62,  90.63) 12/14/2022   17:41:32  ( -70.50,  91.72)   42.12                71
 12/14/2022   18:30:57   (  70.09,-101.23) 12/14/2022   18:31:05  (  70.07,-101.27)    2.70                 8
 12/14/2022   19:21:29   ( -70.03,  66.22) 12/14/2022   19:20:33  ( -70.01,  66.29)    3.14                56
 12/17/2022   14:04:24   (  70.17, -34.71) 12/17/2022   14:05:15  (  70.18, -34.67)    1.83                51
 12/17/2022   14:54:56   ( -70.04, 132.84) 12/17/2022   14:54:45  ( -70.07, 132.81)    3.17                11
 12/17/2022   15:45:30   (  69.42, -58.93) 12/17/2022   15:44:21  (  69.46, -60.38)   56.89                69
 12/20/2022   09:38:07   (  71.07,  30.49) 12/20/2022   09:39:13  (  70.97,  32.97)   90.37                66
 12/20/2022   10:28:24   ( -70.13,-160.65) 12/20/2022   10:28:57  ( -70.10,-160.69)    3.06                33
 12/20/2022   11:19:07   (  70.00,   6.86) 12/20/2022   11:18:24  (  69.99,   6.79)    2.95                43