Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 16.  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)
 04/16/2025   06:19:37   (  70.24,  81.23) 04/16/2025   06:20:48  (  70.23,  81.22)    0.88                71
 04/16/2025   07:10:19   ( -70.12,-111.27) 04/16/2025   07:10:18  ( -70.11,-111.31)    1.82                 1
 04/16/2025   08:00:59   (  69.83,  56.48) 04/16/2025   07:59:47  (  69.90,  56.04)   18.95                72
 04/18/2025   22:36:27   (  70.22,-162.94) 04/18/2025   22:37:15  (  70.19,-162.95)    2.42                48
 04/18/2025   23:27:09   ( -70.10,   4.56) 04/18/2025   23:26:45  ( -70.08,   4.52)    2.52                24
 04/21/2025   14:53:16   (  70.15, -47.05) 04/21/2025   14:53:41  (  70.16, -47.10)    2.39                25
 04/21/2025   15:43:58   ( -70.03, 120.45) 04/21/2025   15:43:11  ( -70.05, 120.37)    3.65                47
 04/24/2025   06:19:26   ( -70.43, -99.02) 04/24/2025   06:20:37  ( -70.36, -98.57)   18.66                71
 04/24/2025   07:10:06   (  70.15,  68.74) 04/24/2025   07:10:06  (  70.14,  68.76)    1.16                 0
 04/24/2025   08:00:48   ( -70.03,-123.76) 04/24/2025   07:59:36  ( -70.03,-123.77)    0.36                72
 04/26/2025   22:36:11   ( -70.23,  17.09) 04/26/2025   22:37:02  ( -70.24,  17.15)    2.33                51
 04/26/2025   23:26:54   (  70.11,-175.40) 04/26/2025   23:26:29  (  70.13,-175.37)    2.49                25
 04/27/2025   00:17:21   ( -69.19,  -6.75) 04/27/2025   00:16:14  ( -69.19,  -9.01)   89.30                67
 04/29/2025   14:53:00   ( -70.20, 132.93) 04/29/2025   14:53:26  ( -70.18, 132.96)    3.00                26
 04/29/2025   15:43:43   (  70.08, -59.56) 04/29/2025   15:42:53  (  70.06, -59.55)    1.43                50