Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 20.  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)
 10/21/2025   06:45:10   ( -70.45,-105.51) 10/21/2025   06:46:21  ( -70.31,-104.76)   31.89                71
 10/21/2025   07:35:49   (  70.04,  62.44) 10/21/2025   07:35:51  (  70.05,  62.50)    2.34                 2
 10/21/2025   08:26:30   ( -69.94,-130.08) 10/21/2025   08:25:21  ( -69.93,-130.03)    2.29                69
 10/23/2025   23:01:54   ( -70.09,  10.85) 10/23/2025   23:02:53  ( -70.07,  10.78)    3.53                59
 10/23/2025   23:52:39   (  70.00, 178.29) 10/23/2025   23:52:19  (  70.02, 178.35)    2.73                20
 10/24/2025   00:43:09   ( -69.31, -13.37) 10/24/2025   00:41:59  ( -69.36, -14.92)   61.02                70
 10/26/2025   15:18:44   ( -70.06, 126.70) 10/26/2025   15:19:20  ( -70.06, 126.66)    1.71                36
 10/26/2025   16:09:29   (  69.97, -65.87) 10/26/2025   16:08:47  (  69.95, -65.86)    2.35                42
 10/29/2025   06:45:01   (  70.57,  74.36) 10/29/2025   06:46:11  (  70.45,  75.47)   43.48                70
 10/29/2025   07:35:33   ( -70.03,-117.47) 10/29/2025   07:35:46  ( -70.01,-117.52)    2.86                13
 10/29/2025   08:26:17   (  69.90,  50.04) 10/29/2025   08:25:13  (  69.90,  49.96)    2.91                64
 10/31/2025   23:01:42   (  70.14,-169.16) 10/31/2025   23:02:41  (  70.13,-169.09)    3.12                59
 10/31/2025   23:52:23   ( -70.02,  -1.66) 10/31/2025   23:52:11  ( -70.03,  -1.60)    2.64                12
 11/01/2025   00:42:57   (  69.36, 166.62) 11/01/2025   00:41:47  (  69.41, 165.20)   55.96                70