Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 11 19.  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)
 11/19/2023   23:51:28   (  69.92, 178.26) 11/19/2023   23:52:15  (  69.93, 178.23)    1.94                47
 11/20/2023   00:42:10   ( -69.82, -14.28) 11/20/2023   00:41:45  ( -69.82, -14.29)    0.70                25
 11/22/2023   15:17:58   ( -70.93, 125.11) 11/22/2023   15:19:04  ( -70.83, 127.77)   97.56                66
 11/22/2023   16:08:24   (  69.88, -65.92) 11/22/2023   16:08:46  (  69.91, -65.94)    3.32                22
 11/22/2023   16:59:06   ( -69.78, 101.55) 11/22/2023   16:58:16  ( -69.80, 101.55)    2.39                50
 11/25/2023   07:34:39   ( -70.06,-117.73) 11/25/2023   07:35:50  ( -70.03,-117.55)    7.81                71
 11/25/2023   08:25:21   (  69.84,  49.90) 11/25/2023   08:25:18  (  69.86,  49.87)    2.24                 3
 11/25/2023   09:16:02   ( -69.69,-142.56) 11/25/2023   09:14:49  ( -69.70,-142.72)    6.40                73
 11/27/2023   23:51:34   ( -69.92,  -1.77) 11/27/2023   23:52:23  ( -69.91,  -1.84)    3.05                49
 11/28/2023   00:42:18   (  69.82, 165.70) 11/28/2023   00:41:50  (  69.80, 165.65)    2.81                28
 11/30/2023   15:18:04   (  70.80, -54.70) 11/30/2023   15:19:11  (  70.70, -52.45)   83.27                67
 11/30/2023   16:08:31   ( -69.90, 114.03) 11/30/2023   16:08:54  ( -69.88, 114.00)    2.13                23
 11/30/2023   16:59:15   (  69.80, -78.51) 11/30/2023   16:58:21  (  69.77, -78.51)    3.28                54