Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 11 1.  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)
 11/01/2023   07:34:22   (  70.57,  61.58) 11/01/2023   07:35:31  (  70.41,  63.06)   57.44                69
 11/01/2023   08:24:53   ( -69.90,-130.05) 11/01/2023   08:25:08  ( -69.91,-130.03)    1.83                15
 11/01/2023   09:15:37   (  69.78,  37.43) 11/01/2023   09:14:36  (  69.76,  37.40)    2.80                61
 11/03/2023   23:51:10   (  69.97, 178.27) 11/03/2023   23:52:05  (  69.96, 178.31)    1.71                55
 11/04/2023   00:41:51   ( -69.82, -14.19) 11/04/2023   00:41:35  ( -69.85, -14.22)    2.92                16
 11/04/2023   01:32:22   (  69.01, 154.28) 11/04/2023   01:31:14  (  69.08, 152.39)   75.29                68
 11/06/2023   16:08:07   (  69.91, -65.89) 11/06/2023   16:08:30  (  69.91, -65.87)    0.88                23
 11/06/2023   16:58:49   ( -69.81, 101.58) 11/06/2023   16:58:00  ( -69.80, 101.61)    2.08                49
 11/09/2023   07:34:21   ( -69.98,-117.54) 11/09/2023   07:35:28  ( -69.99,-117.50)    2.17                67
 11/09/2023   08:25:05   (  69.87,  49.93) 11/09/2023   08:24:55  (  69.88,  49.99)    2.48                10
 11/09/2023   09:15:41   ( -69.45,-142.13) 11/09/2023   09:14:29  ( -69.55,-142.83)   29.47                72
 11/11/2023   23:51:19   ( -69.94,  -1.72) 11/11/2023   23:51:53  ( -69.92,  -1.69)    2.08                34
 11/12/2023   00:42:02   (  69.78, 165.82) 11/12/2023   00:41:20  (  69.81, 165.80)    3.21                42
 11/14/2023   15:17:35   (  70.03, -53.41) 11/14/2023   15:18:47  (  69.98, -53.34)    5.61                72
 11/14/2023   16:08:16   ( -69.86, 114.15) 11/14/2023   16:08:17  ( -69.88, 114.15)    1.43                 1
 11/14/2023   16:58:58   (  69.66, -78.24) 11/14/2023   16:57:45  (  69.70, -78.45)    9.60                73