Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 9 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)
 09/03/2023   16:07:46   (  69.99, -65.85) 09/03/2023   16:08:25  (  70.00, -65.78)    2.67                39
 09/03/2023   16:58:27   ( -69.86, 101.67) 09/03/2023   16:57:55  ( -69.88, 101.70)    2.72                32
 09/06/2023   07:34:10   ( -70.73,-118.56) 09/06/2023   07:35:18  ( -70.61,-116.65)   71.57                68
 09/06/2023   08:24:41   (  69.93,  50.02) 09/06/2023   08:24:56  (  69.90,  49.97)    3.09                15
 09/06/2023   09:15:23   ( -69.84,-142.54) 09/06/2023   09:14:25  ( -69.85,-142.47)    2.83                58
 09/08/2023   23:50:52   ( -69.99,  -1.62) 09/08/2023   23:51:58  ( -70.00,  -1.65)    1.93                66
 09/09/2023   00:41:36   (  69.87, 165.87) 09/09/2023   00:41:25  (  69.89, 165.84)    3.18                11
 09/09/2023   01:32:12   ( -69.46, -26.22) 09/09/2023   01:31:00  ( -69.51, -27.04)   32.52                72
 09/11/2023   16:07:47   ( -69.99, 114.15) 09/11/2023   16:08:26  ( -69.97, 114.20)    2.48                39
 09/11/2023   16:58:31   (  69.87, -78.37) 09/11/2023   16:57:53  (  69.86, -78.32)    2.08                38
 09/14/2023   07:34:09   (  70.50,  61.79) 09/14/2023   07:35:18  (  70.40,  63.06)   48.95                69
 09/14/2023   08:24:42   ( -69.94,-130.02) 09/14/2023   08:24:55  ( -69.91,-130.00)    3.03                13
 09/14/2023   09:15:26   (  69.82,  37.47) 09/14/2023   09:14:22  (  69.80,  37.48)    3.17                64