Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 10.  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)
 09/11/2025   06:45:46   (  70.07,  74.91) 09/11/2025   06:46:16  (  70.05,  74.88)    2.33                30
 09/11/2025   07:36:28   ( -69.98,-117.63) 09/11/2025   07:35:45  ( -69.99,-117.57)    2.77                43
 09/13/2025   22:12:03   ( -70.56,  22.60) 09/13/2025   22:13:13  ( -70.44,  23.68)   42.29                70
 09/13/2025   23:02:39   (  70.03,-169.26) 09/13/2025   23:02:46  (  70.01,-169.30)    3.10                 7
 09/13/2025   23:53:21   ( -69.94,  -1.80) 09/13/2025   23:52:15  ( -69.95,  -1.75)    2.29                66
 09/16/2025   14:28:47   ( -70.11, 139.09) 09/16/2025   14:29:47  ( -70.10, 139.08)    0.74                60
 09/16/2025   15:19:31   (  70.00, -53.43) 09/16/2025   15:19:14  (  70.00, -53.42)    0.35                17
 09/16/2025   16:10:03   ( -69.38, 114.80) 09/16/2025   16:08:53  ( -69.39, 113.38)   55.71                70
 09/19/2025   06:45:40   ( -70.08,-105.09) 09/19/2025   06:46:16  ( -70.08,-105.07)    0.76                36
 09/19/2025   07:36:24   (  69.97,  62.40) 09/19/2025   07:35:43  (  69.97,  62.43)    1.33                41
 09/21/2025   22:11:59   (  70.57,-157.39) 09/21/2025   22:13:09  (  70.48,-156.24)   43.77                70
 09/21/2025   23:02:33   ( -70.06,  10.73) 09/21/2025   23:02:45  ( -70.04,  10.76)    2.31                12
 09/21/2025   23:53:17   (  69.94, 178.21) 09/21/2025   23:52:12  (  69.93, 178.25)    2.07                65
 09/24/2025   14:28:44   (  70.13, -40.92) 09/24/2025   14:29:43  (  70.14, -40.84)    3.24                59
 09/24/2025   15:19:25   ( -69.99, 126.61) 09/24/2025   15:19:14  ( -69.98, 126.57)    1.81                11
 09/24/2025   16:09:59   (  69.34, -65.13) 09/24/2025   16:08:50  (  69.37, -66.62)   58.78                69