Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 28.  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)
 09/29/2025   22:12:00   ( -71.07,  21.81) 09/29/2025   22:13:06  ( -70.95,  24.45)   96.47                66
 09/29/2025   23:02:27   (  70.04,-169.23) 09/29/2025   23:02:48  (  70.03,-169.27)    2.14                21
 09/29/2025   23:53:08   ( -69.93,  -1.73) 09/29/2025   23:52:18  ( -69.92,  -1.80)    2.73                50
 10/02/2025   14:28:36   ( -70.21, 139.00) 10/02/2025   14:29:48  ( -70.19, 139.20)    7.69                72
 10/02/2025   15:19:19   (  70.02, -53.40) 10/02/2025   15:19:16  (  70.03, -53.38)    1.76                 3
 10/02/2025   16:10:00   ( -69.90, 114.10) 10/02/2025   16:08:46  ( -69.92, 114.09)    2.21                74
 10/05/2025   06:45:26   ( -70.08,-105.02) 10/05/2025   06:46:17  ( -70.09,-105.05)    1.61                51
 10/05/2025   07:36:11   (  70.00,  62.41) 10/05/2025   07:35:44  (  69.99,  62.44)    1.86                27
 10/05/2025   08:26:36   ( -69.03,-128.87) 10/05/2025   08:25:29  ( -69.05,-131.18)   91.82                67
 10/07/2025   22:11:54   (  71.09,-158.18) 10/07/2025   22:12:59  (  70.99,-155.45)   99.33                65
 10/07/2025   23:02:18   ( -70.08,  10.77) 10/07/2025   23:02:44  ( -70.07,  10.81)    1.74                26
 10/07/2025   23:53:02   (  69.94, 178.28) 10/07/2025   23:52:11  (  69.95, 178.29)    1.49                51
 10/10/2025   14:28:28   (  70.20, -40.95) 10/10/2025   14:29:39  (  70.15, -40.81)    7.60                71
 10/10/2025   15:19:08   ( -70.03, 126.63) 10/10/2025   15:19:09  ( -70.05, 126.68)    2.83                 1
 10/10/2025   16:09:50   (  69.79, -65.70) 10/10/2025   16:08:38  (  69.82, -66.00)   11.96                72