Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 6 20.  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)
 06/20/2025   14:28:45   (  70.09, -40.87) 06/20/2025   14:29:11  (  70.09, -40.93)    2.29                26
 06/20/2025   15:19:26   ( -69.98, 126.62) 06/20/2025   15:18:41  ( -69.97, 126.55)    2.97                45
 06/23/2025   05:55:01   ( -70.42, -92.91) 06/23/2025   05:56:12  ( -70.33, -92.34)   23.31                71
 06/23/2025   06:45:41   (  70.06,  74.95) 06/23/2025   06:45:42  (  70.06,  74.92)    1.17                 1
 06/23/2025   07:36:22   ( -69.95,-117.56) 06/23/2025   07:35:12  ( -69.95,-117.60)    1.86                70
 06/25/2025   22:11:52   ( -70.12,  23.31) 06/25/2025   22:12:46  ( -70.13,  23.25)    2.68                54
 06/25/2025   23:02:37   (  70.03,-169.25) 06/25/2025   23:02:13  (  70.02,-169.26)    0.95                24
 06/25/2025   23:53:04   ( -69.17,  -0.67) 06/25/2025   23:51:56  ( -69.20,  -2.74)   81.85                68
 06/28/2025   14:28:48   ( -70.09, 139.12) 06/28/2025   14:29:17  ( -70.08, 139.06)    2.66                29
 06/28/2025   15:19:33   (  70.01, -53.45) 06/28/2025   15:18:43  (  70.02, -53.38)    3.20                50
 07/01/2025   05:55:04   (  70.30,  87.24) 07/01/2025   05:56:14  (  70.28,  87.59)   13.56                70
 07/01/2025   06:45:43   ( -70.07,-105.08) 07/01/2025   06:45:46  ( -70.07,-105.08)    0.31                 3
 07/01/2025   07:36:26   (  69.88,  62.51) 07/01/2025   07:35:14  (  69.90,  62.33)    6.94                72
 07/03/2025   22:11:57   (  70.13,-156.73) 07/03/2025   22:12:46  (  70.14,-156.72)    0.97                49
 07/03/2025   23:02:39   ( -70.05,  10.72) 07/03/2025   23:02:16  ( -70.04,  10.77)    1.88                23