Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 12 15.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 12/15/2024   23:03:42   (  70.02,-169.26) 12/15/2024   23:02:41  (  70.00,-169.32)    3.11                61
 12/18/2024   13:39:08   (  70.23, -28.43) 12/18/2024   13:40:14  (  70.20, -28.44)    3.58                66
 12/18/2024   14:29:50   ( -70.12, 139.06) 12/18/2024   14:29:43  ( -70.14, 139.11)    3.28                 7
 12/18/2024   15:20:27   (  69.66, -52.94) 12/18/2024   15:19:16  (  69.71, -53.85)   35.50                71
 12/21/2024   05:55:59   (  70.20,  87.39) 12/21/2024   05:56:43  (  70.19,  87.43)    1.78                44
 12/21/2024   06:46:41   ( -70.09,-105.12) 12/21/2024   06:46:13  ( -70.08,-105.09)    1.07                28
 12/23/2024   22:12:49   (  70.13,-156.72) 12/23/2024   22:13:12  (  70.14,-156.76)    1.71                23
 12/23/2024   23:03:31   ( -70.02,  10.77) 12/23/2024   23:02:42  ( -70.03,  10.72)    2.50                49
 12/26/2024   13:38:58   ( -70.37, 151.38) 12/26/2024   13:40:10  ( -70.32, 151.74)   14.62                72
 12/26/2024   14:29:39   (  70.13, -40.93) 12/26/2024   14:29:38  (  70.15, -40.86)    3.66                 1
 12/26/2024   15:20:21   ( -70.01, 126.56) 12/26/2024   15:19:09  ( -69.99, 126.55)    2.57                72
 12/29/2024   05:55:45   ( -70.17, -92.52) 12/29/2024   05:56:39  ( -70.18, -92.57)    2.11                54
 12/29/2024   06:46:29   (  70.09,  74.92) 12/29/2024   06:46:06  (  70.06,  74.91)    2.85                23