Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 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)
 04/13/2025   14:03:01   (  71.01, -35.80) 04/13/2025   14:04:08  (  70.94, -33.60)   80.09                67
 04/13/2025   14:53:29   ( -70.15, 132.89) 04/13/2025   14:53:50  ( -70.17, 132.88)    1.24                21
 04/13/2025   15:44:13   (  70.07, -59.67) 04/13/2025   15:43:17  (  70.06, -59.62)    2.32                56
 04/16/2025   06:19:37   (  70.24,  81.24) 04/16/2025   06:20:48  (  70.24,  81.23)    0.16                71
 04/16/2025   07:10:19   ( -70.12,-111.26) 04/16/2025   07:10:18  ( -70.12,-111.30)    1.47                 1
 04/16/2025   08:01:00   (  69.88,  56.41) 04/16/2025   07:59:47  (  69.91,  56.05)   14.27                73
 04/18/2025   22:36:27   (  70.21,-162.94) 04/18/2025   22:37:15  (  70.20,-162.93)    1.56                48
 04/18/2025   23:27:09   ( -70.09,   4.56) 04/18/2025   23:26:45  ( -70.09,   4.54)    0.89                24
 04/21/2025   14:53:16   (  70.15, -47.05) 04/21/2025   14:53:41  (  70.18, -47.08)    2.70                25
 04/21/2025   15:43:59   ( -70.08, 120.37) 04/21/2025   15:43:11  ( -70.07, 120.40)    1.88                48
 04/24/2025   06:19:25   ( -70.44, -99.02) 04/24/2025   06:20:36  ( -70.38, -98.54)   19.11                71
 04/24/2025   07:10:05   (  70.16,  68.73) 04/24/2025   07:10:05  (  70.16,  68.79)    2.11                 0
 04/24/2025   08:00:47   ( -70.03,-123.76) 04/24/2025   07:59:35  ( -70.05,-123.73)    2.58                72