Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 21.  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)
 07/22/2025   14:28:58   (  70.09, -40.92) 07/22/2025   14:29:25  (  70.07, -40.95)    3.41                27
 07/22/2025   15:19:40   ( -69.99, 126.55) 07/22/2025   15:18:54  ( -70.01, 126.61)    3.12                46
 07/25/2025   05:55:13   ( -70.42, -92.97) 07/25/2025   05:56:25  ( -70.29, -92.39)   25.70                72
 07/25/2025   06:45:52   (  70.05,  74.91) 07/25/2025   06:45:54  (  70.07,  74.94)    2.48                 2
 07/25/2025   07:36:34   ( -69.95,-117.62) 07/25/2025   07:35:24  ( -69.97,-117.57)    2.88                70
 07/27/2025   22:12:03   ( -70.11,  23.28) 07/27/2025   22:12:58  ( -70.12,  23.25)    1.81                55
 07/27/2025   23:02:47   (  70.02,-169.27) 07/27/2025   23:02:25  (  70.01,-169.26)    0.79                22
 07/27/2025   23:53:15   ( -69.16,  -0.71) 07/27/2025   23:52:07  ( -69.25,  -2.67)   77.93                68
 07/30/2025   14:28:59   ( -70.12, 139.03) 07/30/2025   14:29:28  ( -70.11, 139.11)    3.63                29
 07/30/2025   15:19:42   (  69.98, -53.45) 07/30/2025   15:18:55  (  69.99, -53.41)    1.59                47
 08/02/2025   05:55:15   (  70.37,  87.09) 08/02/2025   05:56:26  (  70.28,  87.61)   21.83                71
 08/02/2025   06:45:53   ( -70.03,-105.07) 08/02/2025   06:45:59  ( -70.02,-105.13)    3.13                 6
 08/02/2025   07:36:37   (  69.95,  62.36) 08/02/2025   07:35:25  (  69.95,  62.42)    2.17                72