Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 3.  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)
 10/05/2025   06:45:26   ( -70.13,-105.10) 10/05/2025   06:46:20  ( -70.11,-105.04)    3.26                54
 10/05/2025   07:36:10   (  69.99,  62.43) 10/05/2025   07:35:47  (  70.00,  62.46)    2.29                23
 10/05/2025   08:26:38   ( -69.19,-129.09) 10/05/2025   08:25:29  ( -69.24,-130.95)   73.80                69
 10/07/2025   23:02:17   ( -70.09,  10.76) 10/07/2025   23:02:51  ( -70.09,  10.81)    2.15                34
 10/07/2025   23:53:01   (  69.94, 178.28) 10/07/2025   23:52:19  (  69.93, 178.23)    2.65                42
 10/10/2025   14:28:35   (  70.59, -41.57) 10/10/2025   14:29:45  (  70.50, -40.34)   46.77                70
 10/10/2025   15:19:08   ( -70.06, 126.59) 10/10/2025   15:19:21  ( -70.07, 126.66)    3.23                13
 10/10/2025   16:09:52   (  69.92, -65.89) 10/10/2025   16:08:49  (  69.91, -65.92)    1.85                63
 10/13/2025   06:45:17   (  70.11,  74.98) 10/13/2025   06:46:21  (  70.10,  74.95)    1.56                64
 10/13/2025   07:35:58   ( -69.99,-117.53) 10/13/2025   07:35:51  ( -69.99,-117.56)    1.30                 7
 10/13/2025   08:26:35   (  69.48,  50.53) 10/13/2025   08:25:24  (  69.55,  49.47)   42.03                71
 10/15/2025   23:02:06   (  70.06,-169.16) 10/15/2025   23:02:48  (  70.07,-169.19)    1.83                42
 10/15/2025   23:52:47   ( -69.94,  -1.66) 10/15/2025   23:52:18  ( -69.97,  -1.70)    3.30                29