Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 11.  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   14:03:02   (  71.02, -35.81) 04/13/2025   14:04:09  (  70.93, -33.61)   80.52                67
 04/13/2025   14:53:30   ( -70.16, 132.88) 04/13/2025   14:53:51  ( -70.16, 132.88)    0.02                21
 04/13/2025   15:44:14   (  70.08, -59.69) 04/13/2025   15:43:18  (  70.06, -59.62)    3.45                56
 04/16/2025   06:19:37   (  70.25,  81.22) 04/16/2025   06:20:48  (  70.24,  81.24)    0.78                71
 04/16/2025   07:10:19   ( -70.12,-111.27) 04/16/2025   07:10:18  ( -70.13,-111.29)    0.86                 1
 04/16/2025   08:01:00   (  69.89,  56.40) 04/16/2025   07:59:47  (  69.91,  56.05)   13.41                73
 04/18/2025   22:36:27   (  70.22,-162.95) 04/18/2025   22:37:15  (  70.22,-162.90)    1.88                48
 04/18/2025   23:27:09   ( -70.10,   4.55) 04/18/2025   23:26:45  ( -70.11,   4.57)    1.81                24
 04/21/2025   14:53:16   (  70.16, -47.07) 04/21/2025   14:53:42  (  70.17, -47.10)    1.35                26
 04/21/2025   15:43:59   ( -70.09, 120.36) 04/21/2025   15:43:12  ( -70.06, 120.38)    3.39                47
 04/24/2025   06:19:27   ( -70.50, -99.11) 04/24/2025   06:20:38  ( -70.40, -98.51)   24.71                71
 04/24/2025   07:10:05   (  70.11,  68.80) 04/24/2025   07:10:08  (  70.12,  68.73)    3.01                 3
 04/24/2025   08:00:48   ( -70.04,-123.77) 04/24/2025   07:59:38  ( -70.02,-123.79)    2.29                70