Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 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)
 08/20/2025   22:12:04   (  70.13,-156.75) 08/20/2025   22:13:10  (  70.13,-156.75)    0.50                66
 08/20/2025   23:02:46   ( -70.01,  10.74) 08/20/2025   23:02:40  ( -70.02,  10.72)    1.29                 6
 08/20/2025   23:53:23   (  69.55, 178.74) 08/20/2025   23:52:12  (  69.64, 177.84)   36.11                71
 08/23/2025   14:28:58   (  70.09, -40.92) 08/23/2025   14:29:40  (  70.11, -40.91)    2.13                42
 08/23/2025   15:19:40   ( -69.97, 126.58) 08/23/2025   15:19:10  ( -69.99, 126.57)    2.97                30
 08/26/2025   05:55:23   ( -70.97, -93.87) 08/26/2025   05:56:30  ( -70.82, -91.61)   84.15                67
 08/26/2025   06:45:51   (  70.05,  74.91) 08/26/2025   06:46:09  (  70.06,  74.91)    1.30                18
 08/26/2025   07:36:33   ( -69.93,-117.59) 08/26/2025   07:35:39  ( -69.95,-117.61)    2.63                54
 08/28/2025   22:12:01   ( -70.10,  23.30) 08/28/2025   22:13:12  ( -70.11,  23.22)    2.97                71
 08/28/2025   23:02:45   (  70.02,-169.27) 08/28/2025   23:02:39  (  70.00,-169.29)    2.08                 6
 08/28/2025   23:53:24   ( -69.74,  -1.53) 08/28/2025   23:52:11  ( -69.79,  -1.96)   17.13                73
 08/31/2025   14:28:55   ( -70.08, 139.11) 08/31/2025   14:29:41  ( -70.09, 139.08)    2.12                46
 08/31/2025   15:19:39   (  69.99, -53.45) 08/31/2025   15:19:08  (  69.98, -53.43)    1.53                31