Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 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)
 10/11/2025   22:36:52   (  70.13,-162.95) 10/11/2025   22:38:03  (  70.13,-162.97)    0.69                71
 10/11/2025   23:27:33   ( -70.02,   4.53) 10/11/2025   23:27:33  ( -70.02,   4.50)    1.21                 0
 10/12/2025   00:18:15   (  69.77, 172.22) 10/12/2025   00:17:02  (  69.81, 171.85)   14.65                73
 10/14/2025   14:53:43   (  70.10, -47.12) 10/14/2025   14:54:33  (  70.08, -47.16)    2.50                50
 10/14/2025   15:44:24   ( -69.99, 120.36) 10/14/2025   15:44:03  ( -69.97, 120.32)    3.01                21
 10/14/2025   16:34:51   (  68.94, -70.81) 10/14/2025   16:33:45  (  69.04, -73.29)   99.38                66
 10/17/2025   07:10:34   (  70.08,  68.70) 10/17/2025   07:11:02  (  70.06,  68.69)    2.25                28
 10/17/2025   08:01:15   ( -69.97,-123.81) 10/17/2025   08:00:32  ( -69.95,-123.82)    2.09                43
 10/19/2025   22:36:47   ( -70.58,  16.40) 10/19/2025   22:37:57  ( -70.45,  17.50)   42.99                70
 10/19/2025   23:27:23   (  70.02,-175.41) 10/19/2025   23:27:30  (  70.01,-175.49)    2.88                 7
 10/20/2025   00:18:05   ( -69.96,  -8.00) 10/20/2025   00:16:59  ( -69.96,  -7.93)    3.00                66
 10/22/2025   14:53:29   ( -70.10, 132.95) 10/22/2025   14:54:31  ( -70.11, 132.89)    2.43                62
 10/22/2025   15:44:14   (  70.01, -59.62) 10/22/2025   15:43:58  (  69.99, -59.63)    2.53                16
 10/22/2025   16:34:46   ( -69.42, 108.57) 10/22/2025   16:33:36  ( -69.45, 107.26)   51.45                70
 10/25/2025   07:10:20   ( -70.10,-111.27) 10/25/2025   07:10:58  ( -70.12,-111.21)    2.94                38
 10/25/2025   08:01:04   (  69.97,  56.24) 10/25/2025   08:00:26  (  69.95,  56.19)    3.11                38