Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 8.  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)
 12/10/2022   11:29:32   (  70.36,   3.73) 12/10/2022   11:30:43  (  70.31,   4.16)   16.96                71
 12/10/2022   12:20:01   ( -70.10, 171.48) 12/10/2022   12:20:15  ( -70.08, 171.47)    2.09                14
 12/10/2022   13:10:45   (  69.98, -21.02) 12/10/2022   13:09:42  (  69.98, -21.03)    0.87                63
 12/13/2022   07:53:28   ( -70.15,-121.95) 12/13/2022   07:54:28  ( -70.16,-121.99)    1.98                60
 12/13/2022   08:44:12   (  70.03,  45.54) 12/13/2022   08:43:55  (  70.05,  45.51)    2.86                17
 12/13/2022   09:34:40   ( -69.71,-146.63) 12/13/2022   09:33:28  ( -69.78,-147.24)   24.65                72
 12/16/2022   04:17:40   (  70.10, 112.07) 12/16/2022   04:18:09  (  70.10, 112.01)    2.39                29
 12/16/2022   05:08:13   ( -70.04, -80.47) 12/16/2022   05:07:38  ( -70.05, -80.43)    1.89                35
 12/18/2022   23:51:10   (  70.30, 178.41) 12/18/2022   23:52:20  (  70.28, 178.72)   11.97                70
 12/19/2022   00:41:41   ( -70.11, -13.95) 12/19/2022   00:41:51  ( -70.12, -13.88)    2.92                10
 12/19/2022   01:32:24   (  69.98, 153.57) 12/19/2022   01:31:19  (  69.96, 153.53)    2.78                65
 12/21/2022   20:15:07   ( -70.15,  52.64) 12/21/2022   20:16:03  ( -70.18,  52.64)    3.12                56
 12/21/2022   21:05:50   (  70.04,-139.88) 12/21/2022   21:05:30  (  70.06,-139.88)    2.64                20
 12/21/2022   21:56:17   ( -69.61,  28.11) 12/21/2022   21:55:05  ( -69.69,  27.24)   34.78                72