Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 12 30.  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)
 01/01/2024   15:18:02   (  70.53, -54.27) 01/01/2024   15:19:11  (  70.40, -52.89)   53.38                69
 01/01/2024   16:08:34   ( -69.91, 114.00) 01/01/2024   16:08:48  ( -69.90, 114.03)    2.03                14
 01/01/2024   16:59:18   (  69.79, -78.51) 01/01/2024   16:58:15  (  69.79, -78.47)    1.68                63
 01/04/2024   07:34:46   (  69.98,  62.36) 01/04/2024   07:35:45  (  70.00,  62.43)    3.33                59
 01/04/2024   08:25:27   ( -69.84,-130.11) 01/04/2024   08:25:16  ( -69.83,-130.17)    2.30                11
 01/04/2024   09:16:01   (  69.19,  38.14) 01/04/2024   09:14:52  (  69.23,  36.66)   58.47                69
 01/06/2024   23:51:38   (  69.92, 178.23) 01/06/2024   23:52:12  (  69.90, 178.18)    2.63                34
 01/07/2024   00:42:20   ( -69.83, -14.32) 01/07/2024   00:41:41  ( -69.85, -14.26)    3.17                39
 01/09/2024   15:17:55   ( -70.40, 125.96) 01/09/2024   15:19:06  ( -70.27, 126.96)   39.99                71
 01/09/2024   16:08:31   (  69.86, -65.91) 01/09/2024   16:08:38  (  69.88, -65.95)    2.55                 7
 01/09/2024   16:59:13   ( -69.77, 101.54) 01/09/2024   16:58:08  ( -69.78, 101.54)    0.49                65
 01/12/2024   07:34:40   ( -69.93,-117.54) 01/12/2024   07:35:37  ( -69.95,-117.60)    3.31                57
 01/12/2024   08:25:24   (  69.82,  49.93) 01/12/2024   08:25:04  (  69.84,  49.88)    2.68                20