Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 12.  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)
 08/12/2025   22:12:05   ( -70.16,  23.21) 08/12/2025   22:13:08  ( -70.16,  23.28)    2.92                63
 08/12/2025   23:02:48   (  70.02,-169.27) 08/12/2025   23:02:36  (  70.00,-169.29)    1.57                12
 08/12/2025   23:53:23   ( -69.53,  -1.23) 08/12/2025   23:52:12  ( -69.56,  -2.27)   40.56                71
 08/15/2025   14:28:58   ( -70.10, 139.06) 08/15/2025   14:29:39  ( -70.08, 139.05)    2.57                41
 08/15/2025   15:19:41   (  69.96, -53.42) 08/15/2025   15:19:06  (  69.98, -53.45)    1.93                35
 08/18/2025   05:55:22   (  70.80,  86.40) 08/18/2025   05:56:30  (  70.69,  88.19)   66.90                68
 08/18/2025   06:45:52   ( -70.05,-105.09) 08/18/2025   06:46:10  ( -70.03,-105.14)    2.71                18
 08/18/2025   07:36:35   (  69.92,  62.43) 08/18/2025   07:35:37  (  69.93,  62.36)    2.98                58
 08/20/2025   22:12:04   (  70.13,-156.75) 08/20/2025   22:13:10  (  70.13,-156.76)    0.24                66
 08/20/2025   23:02:46   ( -70.00,  10.75) 08/20/2025   23:02:40  ( -70.02,  10.73)    2.33                 6
 08/20/2025   23:53:23   (  69.55, 178.73) 08/20/2025   23:52:12  (  69.64, 177.84)   35.97                71
 08/23/2025   14:28:58   (  70.09, -40.92) 08/23/2025   14:29:40  (  70.10, -40.92)    0.51                42
 08/23/2025   15:19:40   ( -69.96, 126.59) 08/23/2025   15:19:10  ( -69.99, 126.57)    3.30                30
 08/26/2025   05:55:22   ( -70.92, -93.78) 08/26/2025   05:56:30  ( -70.81, -91.62)   79.82                68
 08/26/2025   06:45:51   (  70.06,  74.90) 08/26/2025   06:46:09  (  70.04,  74.89)    1.54                18
 08/26/2025   07:36:33   ( -69.93,-117.59) 08/26/2025   07:35:39  ( -69.94,-117.62)    1.90                54