Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 1.  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)
 07/01/2025   05:55:04   (  70.26,  87.31) 07/01/2025   05:56:16  (  70.22,  87.50)    8.73                72
 07/01/2025   06:45:43   ( -70.04,-105.03) 07/01/2025   06:45:47  ( -70.05,-105.10)    3.28                 4
 07/01/2025   07:36:27   (  69.89,  62.50) 07/01/2025   07:35:15  (  69.89,  62.32)    6.67                72
 07/03/2025   22:11:58   (  70.14,-156.73) 07/03/2025   22:12:47  (  70.14,-156.73)    0.36                49
 07/03/2025   23:02:39   ( -70.01,  10.78) 07/03/2025   23:02:17  ( -70.03,  10.75)    2.08                22
 07/06/2025   14:28:53   (  70.12, -40.95) 07/06/2025   14:29:16  (  70.10, -40.89)    3.20                23
 07/06/2025   15:19:34   ( -69.99, 126.57) 07/06/2025   15:18:46  ( -70.00, 126.59)    0.76                48
 07/09/2025   05:55:06   ( -70.29, -92.74) 07/09/2025   05:56:18  ( -70.22, -92.49)   12.31                72
 07/09/2025   06:45:48   (  70.06,  74.91) 07/09/2025   06:45:46  (  70.05,  74.92)    1.19                 2
 07/09/2025   07:36:29   ( -69.92,-117.56) 07/09/2025   07:35:16  ( -69.95,-117.59)    3.18                73
 07/11/2025   22:11:59   ( -70.12,  23.28) 07/11/2025   22:12:49  ( -70.11,  23.24)    2.36                50
 07/11/2025   23:02:43   (  70.01,-169.23) 07/11/2025   23:02:16  (  69.99,-169.28)    2.57                27
 07/11/2025   23:53:08   ( -69.01,  -0.48) 07/11/2025   23:52:01  ( -69.06,  -2.90)   96.42                67
 07/14/2025   13:38:28   (  71.00, -29.68) 07/14/2025   13:39:35  (  70.90, -27.33)   86.15                67
 07/14/2025   14:28:55   ( -70.11, 139.06) 07/14/2025   14:29:18  ( -70.09, 139.10)    2.92                23
 07/14/2025   15:19:38   (  69.95, -53.39) 07/14/2025   15:18:45  (  69.97, -53.43)    2.33                53