Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 11 21.  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)
 11/22/2023   15:17:59   ( -70.94, 125.09) 11/22/2023   15:19:05  ( -70.81, 127.74)   97.78                66
 11/22/2023   16:08:25   (  69.89, -65.93) 11/22/2023   16:08:47  (  69.89, -65.96)    1.15                22
 11/22/2023   16:59:06   ( -69.79, 101.53) 11/22/2023   16:58:16  ( -69.78, 101.52)    1.06                50
 11/25/2023   07:34:38   ( -70.02,-117.67) 11/25/2023   07:35:50  ( -70.00,-117.58)    3.83                72
 11/25/2023   08:25:21   (  69.86,  49.88) 11/25/2023   08:25:18  (  69.84,  49.84)    2.04                 3
 11/25/2023   09:16:02   ( -69.70,-142.57) 11/25/2023   09:14:48  ( -69.74,-142.67)    5.33                74
 11/27/2023   23:51:34   ( -69.93,  -1.78) 11/27/2023   23:52:22  ( -69.94,  -1.80)    0.59                48
 11/28/2023   00:42:18   (  69.83, 165.68) 11/28/2023   00:41:49  (  69.83, 165.69)    0.51                29
 11/30/2023   15:18:04   (  70.81, -54.72) 11/30/2023   15:19:11  (  70.66, -52.50)   83.01                67
 11/30/2023   16:08:31   ( -69.91, 114.01) 11/30/2023   16:08:53  ( -69.90, 114.03)    1.12                22
 11/30/2023   16:59:15   (  69.81, -78.53) 11/30/2023   16:58:20  (  69.79, -78.48)    2.61                55
 12/03/2023   07:34:45   (  69.95,  62.40) 12/03/2023   07:35:54  (  69.95,  62.34)    2.19                69
 12/03/2023   08:25:27   ( -69.84,-130.12) 12/03/2023   08:25:24  ( -69.85,-130.17)    1.84                 3
 12/03/2023   09:16:05   (  69.48,  37.72) 12/03/2023   09:14:53  (  69.57,  37.09)   26.54                72