Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 28.  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)
 04/29/2025   14:02:53   (  71.05, -35.84) 04/29/2025   14:04:00  (  70.93, -33.62)   81.52                67
 04/29/2025   14:53:20   ( -70.15, 132.93) 04/29/2025   14:53:42  ( -70.16, 132.87)    2.55                22
 04/29/2025   15:44:04   (  70.05, -59.61) 04/29/2025   15:43:09  (  70.06, -59.63)    1.28                55
 05/02/2025   06:19:35   (  70.22,  81.26) 05/02/2025   06:20:41  (  70.21,  81.19)    2.80                66
 05/02/2025   07:10:18   ( -70.16,-111.33) 05/02/2025   07:10:10  ( -70.16,-111.26)    2.74                 8
 05/02/2025   08:00:54   (  69.63,  56.76) 05/02/2025   07:59:43  (  69.72,  55.77)   39.26                71
 05/04/2025   22:36:33   (  70.19,-162.94) 05/04/2025   22:37:10  (  70.17,-163.00)    3.14                37
 05/04/2025   23:27:15   ( -70.08,   4.55) 05/04/2025   23:26:40  ( -70.06,   4.48)    3.26                35
 05/07/2025   14:02:55   ( -70.69, 144.71) 05/07/2025   14:04:05  ( -70.58, 145.83)   43.05                70
 05/07/2025   14:53:31   (  70.17, -47.15) 05/07/2025   14:53:38  (  70.14, -47.16)    3.37                 7
 05/07/2025   15:44:13   ( -70.06, 120.33) 05/07/2025   15:43:08  ( -70.03, 120.32)    3.09                65
 05/10/2025   06:19:44   ( -70.21, -98.77) 05/10/2025   06:20:38  ( -70.24, -98.78)    2.94                54
 05/10/2025   07:10:28   (  70.11,  68.69) 05/10/2025   07:10:05  (  70.13,  68.70)    1.55                23