Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 6 7.  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)
 06/07/2025   05:54:48   ( -70.26, -92.63) 06/07/2025   05:56:00  ( -70.22, -92.48)    7.57                72
 06/07/2025   06:45:31   (  70.06,  74.99) 06/07/2025   06:45:28  (  70.07,  74.95)    1.87                 3
 06/07/2025   07:36:11   ( -69.90,-117.45) 06/07/2025   07:34:58  ( -69.95,-117.58)    8.05                73
 06/09/2025   22:11:43   ( -70.15,  23.30) 06/09/2025   22:12:34  ( -70.13,  23.26)    2.96                51
 06/09/2025   23:02:28   (  70.06,-169.24) 06/09/2025   23:02:01  (  70.03,-169.23)    2.71                27
 06/09/2025   23:52:52   ( -69.04,  -0.45) 06/09/2025   23:51:46  ( -69.09,  -2.87)   96.16                66
 06/12/2025   14:28:40   ( -70.15, 139.07) 06/12/2025   14:29:06  ( -70.13, 139.14)    3.20                26
 06/12/2025   15:19:24   (  70.00, -53.40) 06/12/2025   15:18:34  (  69.98, -53.44)    3.40                50
 06/15/2025   05:54:56   (  70.27,  87.33) 06/15/2025   05:56:08  (  70.23,  87.51)    8.47                72
 06/15/2025   06:45:35   ( -70.05,-105.01) 06/15/2025   06:45:39  ( -70.07,-105.08)    3.49                 4
 06/15/2025   07:36:19   (  69.90,  62.52) 06/15/2025   07:35:07  (  69.90,  62.33)    7.01                72
 06/17/2025   22:11:49   (  70.12,-156.68) 06/17/2025   22:12:40  (  70.14,-156.74)    2.85                51
 06/17/2025   23:02:31   ( -70.05,  10.74) 06/17/2025   23:02:10  ( -70.03,  10.75)    2.17                21
 06/17/2025   23:52:58   (  69.01, 179.56) 06/17/2025   23:51:52  (  69.09, 177.12)   97.70                66
 06/20/2025   14:28:46   (  70.14, -40.94) 06/20/2025   14:29:11  (  70.14, -40.86)    3.01                25
 06/20/2025   15:19:27   ( -70.01, 126.57) 06/20/2025   15:18:42  ( -69.99, 126.56)    3.02                45