Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 3 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)
 03/21/2025   22:11:40   ( -70.20,  23.31) 03/21/2025   22:12:52  ( -70.19,  23.28)    1.46                72
 03/21/2025   23:02:24   (  70.09,-169.22) 03/21/2025   23:02:19  (  70.08,-169.22)    1.21                 5
 03/21/2025   23:53:03   ( -69.84,  -1.52) 03/21/2025   23:51:50  ( -69.91,  -1.83)   14.29                73
 03/24/2025   14:28:32   ( -70.13, 139.19) 03/24/2025   14:29:15  ( -70.15, 139.13)    2.82                43
 03/24/2025   15:19:16   (  70.03, -53.35) 03/24/2025   15:18:42  (  70.04, -53.38)    1.19                34
 03/27/2025   05:54:51   (  70.67,  86.80) 03/27/2025   05:56:01  (  70.54,  87.97)   45.77                70
 03/27/2025   06:45:24   ( -70.09,-104.96) 03/27/2025   06:45:37  ( -70.09,-105.04)    3.04                13
 03/27/2025   07:36:08   (  69.99,  62.49) 03/27/2025   07:35:04  (  69.98,  62.44)    2.36                64
 03/29/2025   22:11:34   (  70.18,-156.64) 03/29/2025   22:12:27  (  70.19,-156.63)    1.23                53
 03/29/2025   23:02:16   ( -70.06,  10.85) 03/29/2025   23:01:57  ( -70.07,  10.85)    1.60                19
 03/29/2025   23:52:45   (  69.18, 179.45) 03/29/2025   23:51:38  (  69.18, 177.28)   85.75                67
 04/01/2025   13:37:58   ( -71.14, 150.26) 04/01/2025   13:39:04  ( -71.03, 152.92)   96.66                66
 04/01/2025   14:28:24   (  70.13, -40.78) 04/01/2025   14:28:45  (  70.15, -40.76)    3.01                21
 04/01/2025   15:19:07   ( -70.06, 126.64) 04/01/2025   15:18:15  ( -70.04, 126.72)    3.41                52