Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 1 12.  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)
 01/12/2025   21:47:04   ( -71.18,  28.05) 01/12/2025   21:48:10  ( -71.08,  30.78)   98.76                66
 01/12/2025   22:37:31   (  70.18,-163.01) 01/12/2025   22:37:52  (  70.16,-162.95)    2.98                21
 01/12/2025   23:28:12   ( -70.05,   4.52) 01/12/2025   23:27:22  ( -70.05,   4.52)    0.05                50
 01/15/2025   14:03:40   ( -70.53, 144.93) 01/15/2025   14:04:51  ( -70.41, 145.64)   29.94                71
 01/15/2025   14:54:19   (  70.16, -47.18) 01/15/2025   14:54:21  (  70.14, -47.10)    3.23                 2
 01/15/2025   15:45:00   ( -70.02, 120.35) 01/15/2025   15:43:51  ( -70.03, 120.37)    1.32                69
 01/18/2025   06:20:21   ( -70.20, -98.76) 01/18/2025   06:21:22  ( -70.20, -98.79)    1.18                61
 01/18/2025   07:11:05   (  70.09,  68.72) 01/18/2025   07:10:49  (  70.09,  68.71)    0.61                16
 01/18/2025   08:01:37   ( -69.48,-123.06) 01/18/2025   08:00:27  ( -69.54,-124.42)   53.56                70
 01/20/2025   22:37:09   ( -70.20,  17.04) 01/20/2025   22:37:50  ( -70.17,  17.06)    3.35                41
 01/20/2025   23:27:53   (  70.08,-175.47) 01/20/2025   23:27:17  (  70.06,-175.45)    2.79                36
 01/23/2025   14:03:29   (  71.02, -35.80) 01/23/2025   14:04:36  (  70.87, -33.64)   80.25                67
 01/23/2025   14:53:56   ( -70.15, 132.91) 01/23/2025   14:54:17  ( -70.16, 132.94)    1.66                21
 01/23/2025   15:44:40   (  70.03, -59.60) 01/23/2025   15:43:44  (  70.05, -59.58)    1.98                56