Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 19.  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)
 07/19/2025   22:12:02   (  70.11,-156.72) 07/19/2025   22:12:53  (  70.12,-156.74)    1.61                51
 07/19/2025   23:02:44   ( -70.02,  10.74) 07/19/2025   23:02:23  ( -70.02,  10.74)    0.42                21
 07/19/2025   23:53:11   (  69.00, 179.52) 07/19/2025   23:52:05  (  69.08, 177.12)   96.12                66
 07/22/2025   14:28:57   (  70.07, -40.88) 07/22/2025   14:29:24  (  70.09, -40.91)    2.77                27
 07/22/2025   15:19:39   ( -69.97, 126.59) 07/22/2025   15:18:54  ( -69.99, 126.57)    2.32                45
 07/25/2025   05:55:14   ( -70.44, -93.01) 07/25/2025   05:56:25  ( -70.32, -92.34)   28.07                71
 07/25/2025   06:45:52   (  70.03,  74.94) 07/25/2025   06:45:55  (  70.05,  74.90)    2.37                 3
 07/25/2025   07:36:34   ( -69.92,-117.57) 07/25/2025   07:35:25  ( -69.94,-117.61)    2.90                69
 07/27/2025   22:12:04   ( -70.14,  23.24) 07/27/2025   22:12:58  ( -70.15,  23.29)    2.87                54
 07/27/2025   23:02:47   (  69.99,-169.23) 07/27/2025   23:02:26  (  69.98,-169.30)    2.84                21
 07/27/2025   23:53:16   ( -69.19,  -0.75) 07/27/2025   23:52:08  ( -69.23,  -2.70)   77.25                68
 07/30/2025   14:28:58   ( -70.10, 139.07) 07/30/2025   14:29:28  ( -70.08, 139.07)    1.97                30
 07/30/2025   15:19:41   (  69.96, -53.42) 07/30/2025   15:18:55  (  69.96, -53.45)    1.27                46