Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 16.  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)
 08/18/2023   16:07:33   (  70.01, -65.79) 08/18/2023   16:08:13  (  70.02, -65.71)    3.37                40
 08/18/2023   16:58:14   ( -69.87, 101.74) 08/18/2023   16:57:44  ( -69.85, 101.68)    3.03                30
 08/21/2023   07:33:54   ( -70.90,-118.73) 08/21/2023   07:35:01  ( -70.77,-116.37)   87.42                67
 08/21/2023   08:24:22   (  69.95,  50.08) 08/21/2023   08:24:41  (  69.95,  50.08)    0.46                19
 08/21/2023   09:15:04   ( -69.86,-142.47) 08/21/2023   09:14:11  ( -69.84,-142.45)    2.56                53
 08/23/2023   23:50:30   ( -70.12,  -1.69) 08/23/2023   23:51:41  ( -70.08,  -1.50)    8.41                71
 08/24/2023   00:41:12   (  69.90, 165.94) 08/24/2023   00:41:09  (  69.91, 165.92)    1.90                 3
 08/24/2023   01:31:53   ( -69.76, -26.53) 08/24/2023   01:30:40  ( -69.75, -26.68)    5.94                73
 08/26/2023   16:07:19   ( -70.02, 114.24) 08/26/2023   16:08:09  ( -70.01, 114.31)    2.40                50
 08/26/2023   16:58:03   (  69.91, -78.29) 08/26/2023   16:57:36  (  69.90, -78.21)    3.13                27
 08/26/2023   17:48:28   ( -68.92,  90.45) 08/26/2023   17:47:21  ( -68.97,  88.18)   91.06                67
 08/29/2023   08:24:09   ( -69.98,-129.91) 08/29/2023   08:24:36  ( -69.98,-129.85)    2.55                27
 08/29/2023   09:14:52   (  69.82,  37.63) 08/29/2023   09:14:04  (  69.81,  37.56)    3.16                48