Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 11 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)
 11/22/2025   06:45:13   ( -70.09,-104.96) 11/22/2025   06:46:19  ( -70.11,-105.03)    3.58                66
 11/22/2025   07:35:58   (  70.02,  62.45) 11/22/2025   07:35:46  (  70.00,  62.46)    2.36                12
 11/22/2025   08:26:33   ( -69.56,-129.54) 11/22/2025   08:25:21  ( -69.62,-130.44)   35.50                72
 11/24/2025   23:02:13   ( -70.06,  10.85) 11/24/2025   23:02:46  ( -70.06,  10.78)    2.46                33
 11/24/2025   23:52:57   (  69.95, 178.33) 11/24/2025   23:52:13  (  69.95, 178.27)    2.02                44
 11/27/2025   14:28:31   (  70.14, -40.84) 11/27/2025   14:29:42  (  70.14, -40.84)    0.17                71
 11/27/2025   15:19:13   ( -70.03, 126.64) 11/27/2025   15:19:12  ( -70.03, 126.64)    0.12                 1
 11/27/2025   16:09:54   (  69.77, -65.65) 11/27/2025   16:08:41  (  69.81, -66.02)   14.96                73
 11/30/2025   06:45:29   (  70.07,  75.01) 11/30/2025   06:46:07  (  70.08,  74.98)    1.73                38
 11/30/2025   07:36:11   ( -69.96,-117.49) 11/30/2025   07:35:37  ( -69.98,-117.53)    2.68                34
 12/02/2025   22:11:51   ( -70.47,  22.84) 12/02/2025   22:13:02  ( -70.34,  23.60)   32.15                71
 12/02/2025   23:02:29   (  70.07,-169.22) 12/02/2025   23:02:32  (  70.06,-169.15)    2.67                 3
 12/02/2025   23:53:11   ( -69.94,  -1.72) 12/02/2025   23:52:02  ( -69.95,  -1.67)    2.25                69