Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 21.  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)
 09/21/2025   22:12:01   (  70.69,-157.59) 09/21/2025   22:13:10  (  70.58,-156.10)   56.17                69
 09/21/2025   23:02:32   ( -70.04,  10.76) 09/21/2025   23:02:48  ( -70.03,  10.73)    1.64                16
 09/21/2025   23:53:16   (  69.91, 178.26) 09/21/2025   23:52:15  (  69.93, 178.23)    2.65                61
 09/24/2025   14:28:43   (  70.10, -40.87) 09/24/2025   14:29:49  (  70.11, -40.91)    2.35                66
 09/24/2025   15:19:25   ( -70.02, 126.56) 09/24/2025   15:19:19  ( -70.00, 126.56)    2.53                 6
 09/24/2025   16:10:02   (  69.52, -65.39) 09/24/2025   16:08:51  (  69.62, -66.32)   37.76                71
 09/27/2025   06:45:36   (  70.09,  74.92) 09/27/2025   06:46:19  (  70.11,  74.96)    2.52                43
 09/27/2025   07:36:17   ( -69.96,-117.57) 09/27/2025   07:35:50  ( -69.94,-117.64)    3.42                27
 09/29/2025   23:02:27   (  70.03,-169.21) 09/29/2025   23:02:49  (  70.02,-169.28)    3.04                22
 09/29/2025   23:53:09   ( -69.96,  -1.78) 09/29/2025   23:52:18  ( -69.97,  -1.72)    2.60                51
 10/02/2025   14:28:38   ( -70.28, 138.89) 10/02/2025   14:29:49  ( -70.24, 139.27)   14.71                71
 10/02/2025   15:19:20   (  70.04, -53.44) 10/02/2025   15:19:18  (  70.02, -53.41)    2.92                 2
 10/02/2025   16:10:01   ( -69.92, 114.07) 10/02/2025   16:08:48  ( -69.91, 114.08)    0.62                73
 10/05/2025   06:45:27   ( -70.08,-105.02) 10/05/2025   06:46:20  ( -70.10,-105.05)    2.73                53
 10/05/2025   07:36:12   (  70.00,  62.40) 10/05/2025   07:35:47  (  69.99,  62.44)    2.08                25