Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 18.  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)
 03/19/2023   15:18:32   (  70.07, -53.38) 03/19/2023   15:19:08  (  70.06, -53.42)    1.78                36
 03/19/2023   16:09:14   ( -69.98, 114.08) 03/19/2023   16:08:38  ( -69.95, 114.06)    3.27                36
 03/22/2023   06:44:51   ( -70.73,-105.94) 03/22/2023   06:46:00  ( -70.63,-104.36)   59.21                69
 03/22/2023   07:35:24   (  70.04,  62.45) 03/22/2023   07:35:36  (  70.03,  62.41)    2.07                12
 03/22/2023   08:26:06   ( -69.95,-130.10) 03/22/2023   08:25:06  ( -69.92,-130.11)    3.28                60
 03/24/2023   23:01:31   ( -70.13,  10.78) 03/24/2023   23:02:35  ( -70.12,  10.78)    1.14                64
 03/24/2023   23:52:15   (  70.02, 178.26) 03/24/2023   23:52:02  (  70.00, 178.26)    1.81                13
 03/25/2023   00:42:49   ( -69.50, -13.66) 03/25/2023   00:41:38  ( -69.57, -14.70)   41.17                71
 03/27/2023   15:18:22   ( -70.06, 126.66) 03/27/2023   15:19:02  ( -70.06, 126.58)    3.07                40
 03/27/2023   16:09:06   (  69.96, -65.88) 03/27/2023   16:08:29  (  69.94, -65.94)    3.22                37
 03/30/2023   06:44:41   (  70.64,  74.21) 03/30/2023   06:45:50  (  70.55,  75.56)   50.59                69
 03/30/2023   07:35:14   ( -70.07,-117.57) 03/30/2023   07:35:27  ( -70.07,-117.52)    1.95                13
 03/30/2023   08:25:58   (  69.96,  49.89) 03/30/2023   08:24:54  (  69.95,  49.96)    3.24                64