Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 10.  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)
 12/11/2022   22:06:45   ( -70.13,  24.76) 12/11/2022   22:07:26  ( -70.11,  24.70)    2.87                41
 12/11/2022   22:57:29   (  70.01,-167.75) 12/11/2022   22:56:53  (  70.01,-167.80)    1.77                36
 12/11/2022   23:47:44   ( -69.01,   1.05) 12/11/2022   23:46:38  ( -69.07,  -1.43)   98.97                66
 12/14/2022   17:40:21   ( -70.66,  90.57) 12/14/2022   17:41:31  ( -70.53,  91.76)   45.96                70
 12/14/2022   18:30:56   (  70.07,-101.21) 12/14/2022   18:31:04  (  70.10,-101.23)    3.18                 8
 12/14/2022   19:21:29   ( -70.02,  66.24) 12/14/2022   19:20:34  ( -69.99,  66.25)    2.98                55
 12/17/2022   14:04:24   (  70.16, -34.69) 12/17/2022   14:05:16  (  70.17, -34.69)    1.20                52
 12/17/2022   14:54:57   ( -70.08, 132.78) 12/17/2022   14:54:46  ( -70.06, 132.79)    2.64                11
 12/17/2022   15:45:31   (  69.46, -58.99) 12/17/2022   15:44:21  (  69.51, -60.32)   52.49                70
 12/20/2022   09:38:08   (  71.10,  30.42) 12/20/2022   09:39:14  (  70.98,  32.97)   93.20                66
 12/20/2022   10:28:24   ( -70.11,-160.62) 12/20/2022   10:28:58  ( -70.11,-160.69)    2.60                34
 12/20/2022   11:19:08   (  70.04,   6.80) 12/20/2022   11:18:24  (  70.05,   6.87)    2.97                44
 12/23/2022   06:01:54   ( -70.37, -94.38) 12/23/2022   06:03:06  ( -70.30, -93.97)   17.07                72
 12/23/2022   06:52:33   (  70.06,  73.41) 12/23/2022   06:52:35  (  70.08,  73.35)    2.86                 2
 12/23/2022   07:43:07   ( -69.99,-119.13) 12/23/2022   07:42:05  ( -69.97,-119.16)    2.31                62