Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 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)
 07/30/2025   14:28:58   ( -70.08, 139.10) 07/30/2025   14:29:28  ( -70.07, 139.06)    1.95                30
 07/30/2025   15:19:42   (  69.98, -53.44) 07/30/2025   15:18:55  (  69.96, -53.45)    1.75                47
 08/02/2025   05:55:13   (  70.32,  87.18) 08/02/2025   05:56:25  (  70.23,  87.54)   16.92                72
 08/02/2025   06:45:52   ( -70.05,-105.08) 08/02/2025   06:45:56  ( -70.07,-105.06)    2.37                 4
 08/02/2025   07:36:36   (  69.96,  62.37) 08/02/2025   07:35:23  (  69.96,  62.43)    2.53                73
 08/04/2025   22:12:04   (  70.09,-156.70) 08/04/2025   22:12:56  (  70.09,-156.77)    2.77                52
 08/04/2025   23:02:47   ( -70.02,  10.72) 08/04/2025   23:02:26  ( -69.99,  10.72)    3.56                21
 08/04/2025   23:53:14   (  69.03, 179.47) 08/04/2025   23:52:07  (  69.10, 177.16)   91.83                67
 08/07/2025   14:28:59   (  70.08, -40.90) 08/07/2025   14:29:25  (  70.05, -40.94)    3.17                26
 08/07/2025   15:19:41   ( -69.95, 126.60) 08/07/2025   15:18:55  ( -69.95, 126.55)    2.09                46
 08/10/2025   05:55:13   ( -70.30, -92.79) 08/10/2025   05:56:25  ( -70.21, -92.46)   15.52                72
 08/10/2025   06:45:53   (  70.01,  74.96) 08/10/2025   06:45:53  (  70.04,  74.94)    3.31                 0
 08/10/2025   07:36:36   ( -69.94,-117.61) 08/10/2025   07:35:23  ( -69.94,-117.57)    1.53                73
 08/12/2025   22:12:04   ( -70.13,  23.24) 08/12/2025   22:12:53  ( -70.13,  23.31)    2.83                49
 08/12/2025   23:02:47   (  70.01,-169.26) 08/12/2025   23:02:20  (  70.02,-169.21)    2.00                27