Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 28.  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)
 04/28/2025   06:44:51   ( -70.17,-104.98) 04/28/2025   06:45:46  ( -70.17,-105.04)    2.36                55
 04/28/2025   07:35:35   (  70.07,  62.48) 04/28/2025   07:35:13  (  70.07,  62.46)    0.89                22
 04/28/2025   08:26:03   ( -69.22,-128.96) 04/28/2025   08:24:55  ( -69.30,-130.97)   79.60                68
 04/30/2025   22:11:25   (  71.18,-158.18) 04/30/2025   22:12:30  (  71.09,-155.42)   99.76                65
 04/30/2025   23:01:50   ( -70.17,  10.76) 04/30/2025   23:02:15  ( -70.16,  10.81)    2.32                25
 04/30/2025   23:52:34   (  70.07, 178.23) 04/30/2025   23:51:42  (  70.06, 178.31)    3.72                52
 05/03/2025   14:28:04   (  70.20, -40.83) 05/03/2025   14:29:13  (  70.21, -40.87)    2.27                69
 05/03/2025   15:18:46   ( -70.09, 126.65) 05/03/2025   15:18:43  ( -70.10, 126.61)    2.60                 3
 05/03/2025   16:09:25   (  69.72, -65.49) 05/03/2025   16:08:13  (  69.83, -66.13)   27.52                72
 05/06/2025   06:45:02   (  70.17,  74.96) 05/06/2025   06:45:41  (  70.16,  74.94)    1.46                39
 05/06/2025   07:35:44   ( -70.06,-117.55) 05/06/2025   07:35:11  ( -70.05,-117.58)    1.36                33
 05/08/2025   22:11:24   ( -70.68,  22.60) 05/08/2025   22:12:34  ( -70.62,  23.85)   46.40                70
 05/08/2025   23:01:59   (  70.11,-169.18) 05/08/2025   23:02:08  (  70.12,-169.23)    2.38                 9
 05/08/2025   23:52:41   ( -70.00,  -1.70) 05/08/2025   23:51:38  ( -70.02,  -1.75)    2.50                63
 05/11/2025   14:28:13   ( -70.21, 139.11) 05/11/2025   14:29:07  ( -70.21, 139.13)    1.14                54
 05/11/2025   15:18:57   (  70.11, -53.43) 05/11/2025   15:18:34  (  70.09, -53.39)    2.48                23