Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 19.  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)
 07/21/2025   06:20:30   (  70.11,  81.16) 07/21/2025   06:21:10  (  70.11,  81.17)    0.25                40
 07/21/2025   07:11:12   ( -70.02,-111.37) 07/21/2025   07:10:40  ( -70.00,-111.35)    1.38                32
 07/23/2025   21:46:55   ( -70.91,  28.35) 07/23/2025   21:48:03  ( -70.76,  30.36)   75.05                68
 07/23/2025   22:37:25   (  70.07,-163.01) 07/23/2025   22:37:41  (  70.05,-163.03)    2.26                16
 07/23/2025   23:28:07   ( -69.97,   4.47) 07/23/2025   23:27:11  ( -69.95,   4.45)    2.18                56
 07/26/2025   14:03:36   ( -70.13, 145.37) 07/26/2025   14:04:44  ( -70.15, 145.34)    2.51                68
 07/26/2025   14:54:20   (  70.03, -47.18) 07/26/2025   14:54:11  (  70.04, -47.18)    0.30                 9
 07/26/2025   15:44:57   ( -69.66, 120.70) 07/26/2025   15:43:45  ( -69.72, 120.01)   27.45                72
 07/29/2025   06:20:31   ( -70.14, -98.88) 07/29/2025   06:21:13  ( -70.12, -98.82)    3.24                42
 07/29/2025   07:11:14   (  70.00,  68.64) 07/29/2025   07:10:40  (  70.01,  68.66)    1.11                34
 07/31/2025   21:46:55   (  70.81,-151.50) 07/31/2025   21:48:03  (  70.73,-149.68)   67.29                68
 07/31/2025   22:37:25   ( -70.05,  17.02) 07/31/2025   22:37:43  ( -70.08,  17.00)    3.23                18
 07/31/2025   23:28:09   (  69.97,-175.55) 07/31/2025   23:27:10  (  69.96,-175.51)    1.43                59