Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 27.  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)
 04/29/2025   14:02:52   (  71.02, -35.80) 04/29/2025   14:03:59  (  70.96, -33.58)   80.81                67
 04/29/2025   14:53:20   ( -70.18, 132.89) 04/29/2025   14:53:41  ( -70.19, 132.91)    1.44                21
 04/29/2025   15:44:04   (  70.08, -59.65) 04/29/2025   15:43:08  (  70.08, -59.59)    2.46                56
 05/02/2025   06:19:36   (  70.24,  81.22) 05/02/2025   06:20:41  (  70.24,  81.23)    0.47                65
 05/02/2025   07:10:18   ( -70.13,-111.29) 05/02/2025   07:10:11  ( -70.13,-111.30)    0.20                 7
 05/02/2025   08:00:55   (  69.66,  56.72) 05/02/2025   07:59:44  (  69.69,  55.74)   38.09                71
 05/04/2025   22:36:34   (  70.21,-162.98) 05/04/2025   22:37:10  (  70.20,-162.96)    1.62                36
 05/04/2025   23:27:16   ( -70.10,   4.51) 05/04/2025   23:26:40  ( -70.09,   4.52)    1.16                36
 05/07/2025   14:02:55   ( -70.66, 144.76) 05/07/2025   14:04:06  ( -70.56, 145.80)   40.07                71
 05/07/2025   14:53:31   (  70.19, -47.19) 05/07/2025   14:53:37  (  70.17, -47.11)    3.58                 6
 05/07/2025   15:44:13   ( -70.08, 120.29) 05/07/2025   15:43:07  ( -70.07, 120.37)    3.28                66
 05/10/2025   06:19:44   ( -70.23, -98.81) 05/10/2025   06:20:38  ( -70.23, -98.80)    0.86                54
 05/10/2025   07:10:28   (  70.13,  68.66) 05/10/2025   07:10:05  (  70.11,  68.68)    2.53                23