Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 10.  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   22:12:04   ( -70.12,  23.26) 08/12/2025   22:13:08  ( -70.14,  23.26)    2.35                64
 08/12/2025   23:02:48   (  70.04,-169.30) 08/12/2025   23:02:35  (  70.04,-169.24)    2.23                13
 08/12/2025   23:53:23   ( -69.55,  -1.26) 08/12/2025   23:52:11  ( -69.60,  -2.22)   37.90                72
 08/15/2025   14:28:59   ( -70.12, 139.04) 08/15/2025   14:29:39  ( -70.11, 139.10)    2.21                40
 08/15/2025   15:19:42   (  69.98, -53.45) 08/15/2025   15:19:06  (  70.01, -53.41)    3.16                36
 08/18/2025   05:55:21   (  70.77,  86.46) 08/18/2025   05:56:30  (  70.66,  88.15)   63.39                69
 08/18/2025   06:45:52   ( -70.07,-105.11) 08/18/2025   06:46:09  ( -70.06,-105.10)    0.68                17
 08/18/2025   07:36:35   (  69.93,  62.40) 08/18/2025   07:35:36  (  69.95,  62.40)    2.27                59
 08/20/2025   22:12:04   (  70.15,-156.78) 08/20/2025   22:13:09  (  70.15,-156.72)    2.22                65
 08/20/2025   23:02:46   ( -70.02,  10.73) 08/20/2025   23:02:39  ( -70.05,  10.76)    3.15                 7
 08/20/2025   23:53:23   (  69.57, 178.71) 08/20/2025   23:52:12  (  69.60, 177.79)   35.61                71
 08/23/2025   14:28:58   (  70.11, -40.95) 08/23/2025   14:29:39  (  70.11, -40.90)    1.98                41
 08/23/2025   15:19:40   ( -69.98, 126.56) 08/23/2025   15:19:09  ( -70.01, 126.59)    3.34                31