Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 31.  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)
 08/02/2025   05:55:13   (  70.31,  87.20) 08/02/2025   05:56:25  (  70.24,  87.56)   15.36                72
 08/02/2025   06:45:52   ( -70.04,-105.07) 08/02/2025   06:45:57  ( -70.02,-105.12)    2.63                 5
 08/02/2025   07:36:36   (  69.94,  62.38) 08/02/2025   07:35:24  (  69.92,  62.37)    3.15                72
 08/04/2025   22:12:05   (  70.13,-156.76) 08/04/2025   22:12:56  (  70.11,-156.75)    2.74                51
 08/04/2025   23:02:47   ( -70.01,  10.74) 08/04/2025   23:02:26  ( -70.00,  10.73)    1.27                21
 08/04/2025   23:53:14   (  69.02, 179.48) 08/04/2025   23:52:08  (  69.06, 177.11)   94.69                66
 08/07/2025   14:28:59   (  70.06, -40.88) 08/07/2025   14:29:25  (  70.06, -40.93)    1.68                26
 08/07/2025   15:19:41   ( -69.94, 126.62) 08/07/2025   15:18:55  ( -69.96, 126.56)    3.12                46
 08/10/2025   05:55:12   ( -70.29, -92.77) 08/10/2025   05:56:24  ( -70.22, -92.45)   13.99                72
 08/10/2025   06:45:53   (  70.05,  74.90) 08/10/2025   06:45:52  (  70.05,  74.95)    1.79                 1
 08/10/2025   07:36:35   ( -69.92,-117.59) 08/10/2025   07:35:22  ( -69.95,-117.56)    3.12                73
 08/12/2025   22:12:04   ( -70.12,  23.26) 08/12/2025   22:12:53  ( -70.14,  23.32)    3.30                49
 08/12/2025   23:02:47   (  69.99,-169.24) 08/12/2025   23:02:21  (  69.97,-169.28)    3.37                26