Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 4.  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)
 08/04/2025   22:12:04   (  70.11,-156.73) 08/04/2025   22:13:00  (  70.13,-156.74)    2.06                56
 08/04/2025   23:02:46   ( -70.00,  10.76) 08/04/2025   23:02:30  ( -70.02,  10.73)    2.46                16
 08/04/2025   23:53:17   (  69.21, 179.22) 08/04/2025   23:52:09  (  69.25, 177.34)   74.21                68
 08/07/2025   14:28:59   (  70.10, -40.93) 08/07/2025   14:29:32  (  70.10, -40.90)    1.53                33
 08/07/2025   15:19:41   ( -69.98, 126.56) 08/07/2025   15:19:02  ( -70.00, 126.58)    2.12                39
 08/10/2025   05:55:20   ( -70.69, -93.41) 08/10/2025   05:56:29  ( -70.61, -91.94)   55.28                69
 08/10/2025   06:45:54   (  70.08,  74.85) 08/10/2025   06:46:04  (  70.06,  74.92)    3.37                10
 08/10/2025   07:36:36   ( -69.96,-117.64) 08/10/2025   07:35:34  ( -69.96,-117.60)    1.69                62
 08/12/2025   22:12:04   ( -70.10,  23.29) 08/12/2025   22:13:09  ( -70.11,  23.22)    2.80                65
 08/12/2025   23:02:48   (  70.02,-169.28) 08/12/2025   23:02:36  (  70.00,-169.29)    2.31                12
 08/12/2025   23:53:23   ( -69.53,  -1.23) 08/12/2025   23:52:12  ( -69.57,  -2.26)   40.14                71
 08/15/2025   14:28:58   ( -70.10, 139.07) 08/15/2025   14:29:39  ( -70.10, 139.07)    0.16                41
 08/15/2025   15:19:41   (  69.97, -53.43) 08/15/2025   15:19:06  (  69.98, -53.44)    1.77                35
 08/18/2025   05:55:22   (  70.81,  86.40) 08/18/2025   05:56:30  (  70.71,  88.22)   67.67                68
 08/18/2025   06:45:52   ( -70.04,-105.08) 08/18/2025   06:46:10  ( -70.06,-105.10)    2.27                18
 08/18/2025   07:36:36   (  69.97,  62.34) 08/18/2025   07:35:37  (  69.95,  62.38)    2.98                59