Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 25.  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)
 04/26/2025   22:36:22   ( -70.22,  17.06) 04/26/2025   22:37:11  ( -70.22,  17.08)    0.93                49
 04/26/2025   23:27:06   (  70.12,-175.48) 04/26/2025   23:26:38  (  70.12,-175.42)    2.52                28
 04/29/2025   14:02:53   (  71.06, -35.87) 04/29/2025   14:04:00  (  70.93, -33.63)   82.62                67
 04/29/2025   14:53:20   ( -70.16, 132.91) 04/29/2025   14:53:42  ( -70.16, 132.87)    1.54                22
 04/29/2025   15:44:04   (  70.07, -59.64) 04/29/2025   15:43:09  (  70.05, -59.64)    1.22                55
 05/02/2025   06:19:36   (  70.23,  81.24) 05/02/2025   06:20:42  (  70.23,  81.21)    1.39                66
 05/02/2025   07:10:18   ( -70.11,-111.27) 05/02/2025   07:10:12  ( -70.12,-111.31)    2.12                 6
 05/02/2025   08:00:55   (  69.64,  56.75) 05/02/2025   07:59:44  (  69.74,  55.80)   38.09                71
 05/04/2025   22:36:34   (  70.19,-162.94) 05/04/2025   22:37:11  (  70.22,-162.94)    3.43                37
 05/04/2025   23:27:17   ( -70.13,   4.47) 05/04/2025   23:26:41  ( -70.11,   4.55)    3.40                36
 05/07/2025   14:02:56   ( -70.73, 144.65) 05/07/2025   14:04:06  ( -70.61, 145.88)   47.04                70
 05/07/2025   14:53:31   (  70.16, -47.14) 05/07/2025   14:53:39  (  70.17, -47.12)    1.77                 8
 05/07/2025   15:44:13   ( -70.05, 120.35) 05/07/2025   15:43:09  ( -70.07, 120.36)    2.69                64