Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 5 16.  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)
 05/16/2025   22:11:25   (  70.21,-156.70) 05/16/2025   22:12:34  (  70.21,-156.74)    1.60                69
 05/16/2025   23:02:07   ( -70.13,  10.75) 05/16/2025   23:02:03  ( -70.15,  10.81)    3.30                 4
 05/16/2025   23:52:46   (  69.73, 178.65) 05/16/2025   23:51:34  (  69.83, 178.00)   27.00                72
 05/19/2025   14:28:22   (  70.16, -40.86) 05/19/2025   14:29:03  (  70.18, -40.91)    2.98                41
 05/19/2025   15:19:04   ( -70.08, 126.59) 05/19/2025   15:18:33  ( -70.06, 126.55)    2.17                31
 05/22/2025   05:54:47   ( -70.87, -93.54) 05/22/2025   05:55:55  ( -70.76, -91.81)   64.25                68
 05/22/2025   06:45:20   (  70.16,  74.89) 05/22/2025   06:45:31  (  70.17,  74.96)    2.60                11
 05/22/2025   07:36:01   ( -70.03,-117.59) 05/22/2025   07:35:01  ( -70.06,-117.57)    3.07                60
 05/24/2025   22:11:32   ( -70.20,  23.29) 05/24/2025   22:12:33  ( -70.20,  23.23)    2.26                61
 05/24/2025   23:02:15   (  70.07,-169.21) 05/24/2025   23:01:59  (  70.09,-169.28)    3.32                16
 05/24/2025   23:52:47   ( -69.46,  -0.99) 05/24/2025   23:51:37  ( -69.54,  -2.41)   55.85                70
 05/27/2025   14:28:28   ( -70.17, 139.10) 05/27/2025   14:29:00  ( -70.15, 139.05)    2.59                32
 05/27/2025   15:19:12   (  70.04, -53.40) 05/27/2025   15:18:27  (  70.04, -53.46)    2.52                45