Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 11 10.  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)
 11/11/2023   23:51:18   ( -69.93,  -1.71) 11/11/2023   23:52:12  ( -69.94,  -1.75)    2.41                54
 11/12/2023   00:42:02   (  69.81, 165.77) 11/12/2023   00:41:39  (  69.84, 165.75)    3.02                23
 11/12/2023   01:32:30   ( -68.98, -25.71) 11/12/2023   01:31:22  ( -69.01, -27.72)   80.17                68
 11/14/2023   15:17:51   (  70.91, -54.82) 11/14/2023   15:18:57  (  70.79, -52.26)   94.52                66
 11/14/2023   16:08:16   ( -69.92, 114.07) 11/14/2023   16:08:41  ( -69.91, 114.09)    0.88                25
 11/14/2023   16:59:00   (  69.81, -78.46) 11/14/2023   16:58:08  (  69.80, -78.41)    1.66                52
 11/17/2023   07:34:31   (  69.97,  62.43) 11/17/2023   07:35:39  (  69.99,  62.46)    3.09                68
 11/17/2023   08:25:13   ( -69.86,-130.09) 11/17/2023   08:25:09  ( -69.89,-130.06)    2.81                 4
 11/17/2023   09:15:52   (  69.49,  37.76) 11/17/2023   09:14:40  (  69.55,  37.13)   25.50                72
 11/19/2023   23:51:27   (  69.93, 178.25) 11/19/2023   23:52:06  (  69.92, 178.25)    1.38                39
 11/20/2023   00:42:09   ( -69.82, -14.27) 11/20/2023   00:41:36  ( -69.81, -14.27)    1.28                33
 11/22/2023   15:17:49   ( -70.48, 125.85) 11/22/2023   15:18:59  ( -70.35, 127.11)   49.22                70
 11/22/2023   16:08:23   (  69.86, -65.88) 11/22/2023   16:08:33  (  69.85, -65.95)    2.96                10
 11/22/2023   16:59:05   ( -69.75, 101.60) 11/22/2023   16:58:03  ( -69.75, 101.54)    2.57                62