Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 29.  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   14:28:57   ( -70.06, 139.12) 07/30/2025   14:29:27  ( -70.08, 139.08)    2.81                30
 07/30/2025   15:19:41   (  69.97, -53.42) 07/30/2025   15:18:54  (  69.98, -53.43)    1.05                47
 08/02/2025   05:55:13   (  70.31,  87.20) 08/02/2025   05:56:25  (  70.24,  87.56)   15.34                72
 08/02/2025   06:45:52   ( -70.03,-105.06) 08/02/2025   06:45:57  ( -70.02,-105.12)    2.38                 5
 08/02/2025   07:36:36   (  69.94,  62.38) 08/02/2025   07:35:24  (  69.91,  62.37)    3.14                72
 08/04/2025   22:12:05   (  70.13,-156.76) 08/04/2025   22:12:56  (  70.10,-156.75)    2.71                51
 08/04/2025   23:02:47   ( -70.01,  10.75) 08/04/2025   23:02:26  ( -70.00,  10.73)    0.75                21
 08/04/2025   23:53:14   (  69.02, 179.49) 08/04/2025   23:52:08  (  69.06, 177.11)   94.77                66
 08/07/2025   14:28:59   (  70.06, -40.88) 08/07/2025   14:29:25  (  70.06, -40.93)    1.85                26
 08/07/2025   15:19:42   ( -69.99, 126.55) 08/07/2025   15:18:55  ( -69.96, 126.56)    3.24                47
 08/10/2025   05:55:12   ( -70.28, -92.76) 08/10/2025   05:56:24  ( -70.22, -92.45)   13.51                72
 08/10/2025   06:45:53   (  70.05,  74.90) 08/10/2025   06:45:52  (  70.05,  74.94)    1.54                 1
 08/10/2025   07:36:35   ( -69.92,-117.58) 08/10/2025   07:35:22  ( -69.95,-117.56)    3.37                73