Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 6 25.  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)
 06/25/2025   22:11:52   ( -70.14,  23.29) 06/25/2025   22:12:45  ( -70.17,  23.30)    3.41                53
 06/25/2025   23:02:37   (  70.04,-169.26) 06/25/2025   23:02:13  (  70.01,-169.27)    3.16                24
 06/25/2025   23:53:03   ( -69.14,  -0.62) 06/25/2025   23:51:56  ( -69.19,  -2.76)   84.94                67
 06/28/2025   14:28:48   ( -70.11, 139.10) 06/28/2025   14:29:16  ( -70.12, 139.12)    1.90                28
 06/28/2025   15:19:33   (  70.02, -53.46) 06/28/2025   15:18:43  (  70.02, -53.38)    2.82                50
 07/01/2025   05:55:05   (  70.31,  87.23) 07/01/2025   05:56:15  (  70.28,  87.59)   13.87                70
 07/01/2025   06:45:44   ( -70.08,-105.09) 07/01/2025   06:45:47  ( -70.06,-105.09)    1.74                 3
 07/01/2025   07:36:27   (  69.89,  62.50) 07/01/2025   07:35:15  (  69.90,  62.33)    6.64                72
 07/03/2025   22:11:57   (  70.13,-156.73) 07/03/2025   22:12:46  (  70.15,-156.72)    1.77                49
 07/03/2025   23:02:39   ( -70.05,  10.71) 07/03/2025   23:02:16  ( -70.04,  10.77)    2.47                23
 07/06/2025   14:28:53   (  70.12, -40.94) 07/06/2025   14:29:16  (  70.11, -40.88)    2.16                23
 07/06/2025   15:19:34   ( -69.98, 126.59) 07/06/2025   15:18:47  ( -69.96, 126.53)    3.40                47
 07/09/2025   05:55:06   ( -70.27, -92.72) 07/09/2025   05:56:18  ( -70.23, -92.47)   10.43                72
 07/09/2025   06:45:48   (  70.05,  74.93) 07/09/2025   06:45:46  (  70.06,  74.93)    0.96                 2
 07/09/2025   07:36:29   ( -69.91,-117.54) 07/09/2025   07:35:17  ( -69.91,-117.65)    4.35                72