Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 13.  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)
 07/14/2025   13:38:30   (  71.11, -29.86) 07/14/2025   13:39:36  (  71.01, -27.17)   98.00                66
 07/14/2025   14:28:54   ( -70.08, 139.12) 07/14/2025   14:29:21  ( -70.08, 139.08)    1.87                27
 07/14/2025   15:19:38   (  69.96, -53.39) 07/14/2025   15:18:48  (  69.98, -53.42)    3.03                50
 07/17/2025   05:55:10   (  70.27,  87.27) 07/17/2025   05:56:21  (  70.25,  87.56)   10.97                71
 07/17/2025   06:45:50   ( -70.07,-105.10) 07/17/2025   06:45:52  ( -70.09,-105.04)    3.23                 2
 07/17/2025   07:36:33   (  69.90,  62.46) 07/17/2025   07:35:20  (  69.92,  62.37)    3.93                73
 07/19/2025   22:12:02   (  70.11,-156.72) 07/19/2025   22:12:53  (  70.12,-156.74)    1.28                51
 07/19/2025   23:02:44   ( -70.01,  10.75) 07/19/2025   23:02:23  ( -70.02,  10.75)    1.16                21
 07/19/2025   23:53:11   (  69.00, 179.52) 07/19/2025   23:52:05  (  69.08, 177.12)   95.97                66
 07/22/2025   14:28:57   (  70.07, -40.89) 07/22/2025   14:29:24  (  70.09, -40.91)    2.96                27
 07/22/2025   15:19:40   ( -70.01, 126.52) 07/22/2025   15:18:54  ( -70.00, 126.59)    3.18                46
 07/25/2025   05:55:14   ( -70.43, -92.99) 07/25/2025   05:56:25  ( -70.33, -92.33)   27.13                71
 07/25/2025   06:45:52   (  70.03,  74.95) 07/25/2025   06:45:55  (  70.05,  74.91)    3.07                 3
 07/25/2025   07:36:35   ( -69.96,-117.64) 07/25/2025   07:35:25  ( -69.96,-117.59)    2.12                70