Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 4 29.  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)
 04/30/2024   14:27:49   (  70.99, -42.31) 04/30/2024   14:28:55  (  70.89, -39.83)   90.57                66
 04/30/2024   15:18:15   ( -70.06, 126.51) 04/30/2024   15:18:38  ( -70.07, 126.58)    2.99                23
 04/30/2024   16:08:58   (  69.90, -65.93) 04/30/2024   16:08:06  (  69.91, -65.99)    2.86                52
 05/03/2024   06:44:26   (  70.13,  74.88) 05/03/2024   06:45:37  (  70.11,  74.88)    2.06                71
 05/03/2024   07:35:07   ( -69.98,-117.58) 05/03/2024   07:35:07  ( -70.00,-117.64)    2.85                 0
 05/03/2024   08:25:48   (  69.71,  50.13) 05/03/2024   08:24:36  (  69.78,  49.70)   18.04                72
 05/05/2024   23:01:19   (  70.11,-169.32) 05/05/2024   23:02:04  (  70.10,-169.24)    3.20                45
 05/05/2024   23:52:00   ( -69.97,  -1.78) 05/05/2024   23:51:34  ( -69.99,  -1.76)    3.30                26
 05/08/2024   14:27:44   ( -71.05, 137.63) 05/08/2024   14:28:50  ( -70.93, 140.23)   95.01                66
 05/08/2024   15:18:11   (  70.06, -53.45) 05/08/2024   15:18:31  (  70.05, -53.43)    1.40                20
 05/08/2024   16:08:53   ( -69.96, 114.01) 05/08/2024   16:08:01  ( -69.95, 114.06)    2.66                52
 05/11/2024   06:44:18   ( -70.13,-105.08) 05/11/2024   06:45:29  ( -70.13,-105.07)    0.89                71
 05/11/2024   07:35:02   (  70.02,  62.39) 05/11/2024   07:34:56  (  70.01,  62.41)    1.00                 6
 05/11/2024   08:25:41   ( -69.77,-129.90) 05/11/2024   08:24:28  ( -69.80,-130.25)   13.97                73