Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 11 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)
 11/03/2023   23:51:09   (  69.95, 178.31) 11/03/2023   23:52:05  (  69.93, 178.26)    2.20                56
 11/04/2023   00:41:51   ( -69.85, -14.23) 11/04/2023   00:41:34  ( -69.87, -14.19)    2.81                17
 11/04/2023   01:32:22   (  69.04, 154.24) 11/04/2023   01:31:14  (  69.05, 152.35)   75.04                68
 11/06/2023   16:08:07   (  69.88, -65.84) 11/06/2023   16:08:31  (  69.89, -65.90)    2.29                24
 11/06/2023   16:58:49   ( -69.79, 101.62) 11/06/2023   16:58:01  ( -69.77, 101.57)    2.45                48
 11/09/2023   07:34:22   ( -70.00,-117.57) 11/09/2023   07:35:29  ( -69.97,-117.53)    3.28                67
 11/09/2023   08:25:05   (  69.83,  49.98) 11/09/2023   08:24:56  (  69.86,  49.96)    2.85                 9
 11/09/2023   09:15:42   ( -69.47,-142.16) 11/09/2023   09:14:30  ( -69.53,-142.86)   28.16                72
 11/11/2023   23:51:18   ( -69.90,  -1.67) 11/11/2023   23:51:53  ( -69.91,  -1.72)    2.07                35
 11/12/2023   00:42:02   (  69.80, 165.80) 11/12/2023   00:41:20  (  69.79, 165.77)    1.01                42
 11/14/2023   15:17:35   (  70.03, -53.42) 11/14/2023   15:18:46  (  70.03, -53.27)    5.82                71
 11/14/2023   16:08:16   ( -69.87, 114.14) 11/14/2023   16:08:17  ( -69.87, 114.13)    0.35                 1
 11/14/2023   16:58:58   (  69.66, -78.25) 11/14/2023   16:57:45  (  69.69, -78.46)    9.00                73