Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 12 2.  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)
 12/03/2023   07:34:43   (  69.97,  62.37) 12/03/2023   07:35:47  (  69.98,  62.40)    1.37                64
 12/03/2023   08:25:25   ( -69.87,-130.16) 12/03/2023   08:25:17  ( -69.86,-130.13)    1.70                 8
 12/03/2023   09:16:01   (  69.34,  37.93) 12/03/2023   09:14:50  (  69.43,  36.92)   40.69                71
 12/05/2023   23:51:38   (  69.90, 178.24) 12/05/2023   23:52:15  (  69.90, 178.18)    2.66                37
 12/06/2023   00:42:20   ( -69.80, -14.29) 12/06/2023   00:41:45  ( -69.79, -14.35)    2.87                35
 12/08/2023   15:17:58   ( -70.43, 125.89) 12/08/2023   15:19:08  ( -70.31, 127.01)   44.21                70
 12/08/2023   16:08:33   (  69.85, -65.91) 12/08/2023   16:08:41  (  69.87, -65.97)    2.86                 8
 12/08/2023   16:59:15   ( -69.75, 101.55) 12/08/2023   16:58:11  ( -69.76, 101.51)    1.77                64
 12/11/2023   07:34:45   ( -69.97,-117.64) 12/11/2023   07:35:39  ( -69.95,-117.60)    2.94                54
 12/11/2023   08:25:28   (  69.82,  49.91) 12/11/2023   08:25:06  (  69.84,  49.89)    2.27                22
 12/11/2023   09:15:56   ( -68.97,-141.57) 12/11/2023   09:14:48  ( -69.07,-143.51)   78.06                68
 12/13/2023   23:01:12   (  70.85,-170.56) 12/13/2023   23:02:19  (  70.74,-168.18)   88.23                67
 12/13/2023   23:51:38   ( -69.90,  -1.75) 12/13/2023   23:52:02  ( -69.92,  -1.74)    2.08                24
 12/14/2023   00:42:22   (  69.80, 165.71) 12/14/2023   00:41:29  (  69.80, 165.74)    1.38                53