Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 15.  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)
 07/17/2025   05:55:10   (  70.28,  87.25) 07/17/2025   05:56:21  (  70.23,  87.53)   12.14                71
 07/17/2025   06:45:50   ( -70.09,-105.13) 07/17/2025   06:45:52  ( -70.07,-105.06)    2.94                 2
 07/17/2025   07:36:33   (  69.92,  62.44) 07/17/2025   07:35:20  (  69.91,  62.35)    3.25                73
 07/19/2025   22:12:03   (  70.13,-156.75) 07/19/2025   22:12:54  (  70.11,-156.77)    2.58                51
 07/19/2025   23:02:45   ( -70.03,  10.72) 07/19/2025   23:02:24  ( -70.00,  10.72)    2.86                21
 07/19/2025   23:53:12   (  69.02, 179.50) 07/19/2025   23:52:06  (  69.06, 177.10)   95.70                66
 07/22/2025   14:28:57   (  70.08, -40.91) 07/22/2025   14:29:24  (  70.08, -40.93)    1.09                27
 07/22/2025   15:19:39   ( -69.98, 126.57) 07/22/2025   15:18:54  ( -69.98, 126.56)    0.29                45
 07/25/2025   05:55:13   ( -70.40, -92.94) 07/25/2025   05:56:25  ( -70.31, -92.35)   23.77                72
 07/25/2025   06:45:52   (  70.04,  74.92) 07/25/2025   06:45:55  (  70.03,  74.89)    1.66                 3
 07/25/2025   07:36:34   ( -69.93,-117.59) 07/25/2025   07:35:25  ( -69.94,-117.62)    1.29                69
 07/27/2025   22:12:04   ( -70.14,  23.23) 07/27/2025   22:12:58  ( -70.15,  23.29)    2.47                54
 07/27/2025   23:02:47   (  70.01,-169.25) 07/27/2025   23:02:25  (  70.03,-169.24)    2.91                22