Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 23.  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)
 04/25/2025   14:27:59   ( -70.54, 138.68) 04/25/2025   14:29:10  ( -70.44, 139.48)   31.70                71
 04/25/2025   15:18:37   (  70.13, -53.37) 04/25/2025   15:18:41  (  70.12, -53.34)    1.90                 4
 04/25/2025   16:09:19   ( -70.02, 114.12) 04/25/2025   16:08:11  ( -70.00, 114.13)    1.35                68
 04/28/2025   06:44:51   ( -70.16,-104.97) 04/28/2025   06:45:40  ( -70.16,-105.04)    2.71                49
 04/28/2025   07:35:35   (  70.07,  62.48) 04/28/2025   07:35:07  (  70.05,  62.45)    2.55                28
 04/30/2025   22:11:18   (  70.80,-157.56) 04/30/2025   22:12:27  (  70.66,-156.05)   57.74                69
 04/30/2025   23:01:50   ( -70.16,  10.78) 04/30/2025   23:02:04  ( -70.16,  10.86)    2.84                14
 04/30/2025   23:52:33   (  70.01, 178.32) 04/30/2025   23:51:32  (  69.99, 178.27)    2.90                61
 05/03/2025   14:28:04   (  70.18, -40.81) 05/03/2025   14:28:58  (  70.18, -40.85)    1.49                54
 05/03/2025   15:18:46   ( -70.07, 126.68) 05/03/2025   15:18:28  ( -70.07, 126.63)    2.23                18
 05/03/2025   16:09:15   (  69.17, -64.70) 05/03/2025   16:08:08  (  69.24, -66.86)   85.42                67
 05/06/2025   05:54:34   ( -71.08, -93.82) 05/06/2025   05:55:41  ( -70.99, -91.39)   88.35                67
 05/06/2025   06:45:02   (  70.15,  75.00) 05/06/2025   06:45:21  (  70.16,  75.02)    1.82                19
 05/06/2025   07:35:44   ( -70.03,-117.51) 05/06/2025   07:34:51  ( -70.05,-117.50)    2.34                53