Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 5 18.  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)
 05/18/2025   06:19:54   (  70.18,  81.23) 05/18/2025   06:20:43  (  70.16,  81.23)    2.39                49
 05/18/2025   07:10:35   ( -70.05,-111.25) 05/18/2025   07:10:13  ( -70.04,-111.30)    1.90                22
 05/20/2025   22:36:50   (  70.13,-162.94) 05/20/2025   22:37:13  (  70.12,-162.95)    1.48                23
 05/20/2025   23:27:31   ( -70.00,   4.58) 05/20/2025   23:26:43  ( -70.01,   4.53)    1.98                48
 05/23/2025   14:03:04   ( -70.28, 145.29) 05/23/2025   14:04:15  ( -70.27, 145.51)    8.22                71
 05/23/2025   14:53:47   (  70.09, -47.12) 05/23/2025   14:53:43  (  70.11, -47.08)    2.69                 4
 05/23/2025   15:44:27   ( -69.91, 120.48) 05/23/2025   15:43:14  ( -69.95, 120.32)    7.19                73
 05/26/2025   06:19:59   ( -70.14, -98.74) 05/26/2025   06:20:47  ( -70.13, -98.81)    2.74                48
 05/26/2025   07:10:44   (  70.06,  68.69) 05/26/2025   07:10:13  (  70.08,  68.76)    3.50                31
 05/28/2025   21:46:28   (  70.93,-151.56) 05/28/2025   21:47:35  (  70.84,-149.50)   75.32                67
 05/28/2025   22:36:56   ( -70.11,  17.06) 05/28/2025   22:37:16  ( -70.14,  17.08)    2.73                20
 05/28/2025   23:27:41   (  70.03,-175.51) 05/28/2025   23:26:43  (  70.02,-175.43)    3.00                58
 05/31/2025   14:03:10   (  70.17, -34.58) 05/31/2025   14:04:15  (  70.16, -34.63)    2.08                65
 05/31/2025   14:53:51   ( -70.04, 132.94) 05/31/2025   14:53:45  ( -70.06, 132.86)    3.67                 6
 05/31/2025   15:44:29   (  69.59, -59.09) 05/31/2025   15:43:18  (  69.61, -60.12)   40.01                71