Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 10.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 04/10/2025   22:36:40   ( -70.22,  17.01) 04/10/2025   22:37:22  ( -70.20,  17.06)    2.61                42
 04/10/2025   23:27:23   (  70.08,-175.47) 04/10/2025   23:26:49  (  70.10,-175.44)    2.74                34
 04/13/2025   14:03:02   (  71.02, -35.82) 04/13/2025   14:04:09  (  70.92, -33.63)   80.15                67
 04/13/2025   14:53:30   ( -70.16, 132.88) 04/13/2025   14:53:51  ( -70.15, 132.86)    1.69                21
 04/13/2025   15:44:13   (  70.03, -59.61) 04/13/2025   15:43:18  (  70.04, -59.64)    1.95                55
 04/16/2025   06:19:37   (  70.24,  81.23) 04/16/2025   06:20:47  (  70.27,  81.28)    3.15                70
 04/16/2025   07:10:19   ( -70.12,-111.27) 04/16/2025   07:10:18  ( -70.10,-111.33)    3.04                 1
 04/16/2025   08:00:59   (  69.83,  56.48) 04/16/2025   07:59:47  (  69.88,  56.01)   18.68                72
 04/18/2025   22:36:27   (  70.22,-162.94) 04/18/2025   22:37:14  (  70.22,-162.90)    1.80                47
 04/18/2025   23:27:09   ( -70.09,   4.57) 04/18/2025   23:26:44  ( -70.12,   4.58)    2.84                25
 04/21/2025   14:53:17   (  70.20, -47.13) 04/21/2025   14:53:40  (  70.19, -47.06)    2.68                23
 04/21/2025   15:43:59   ( -70.07, 120.38) 04/21/2025   15:43:10  ( -70.08, 120.42)    1.75                49