Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 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)
 10/14/2025   14:53:43   (  70.08, -47.09) 10/14/2025   14:54:33  (  70.10, -47.13)    2.58                50
 10/14/2025   15:44:24   ( -69.97, 120.39) 10/14/2025   15:44:03  ( -69.99, 120.34)    2.35                21
 10/14/2025   16:34:51   (  68.97, -70.86) 10/14/2025   16:33:45  (  69.00, -73.34)   99.06                66
 10/17/2025   07:10:33   (  70.06,  68.73) 10/17/2025   07:11:01  (  70.07,  68.71)    1.04                28
 10/17/2025   08:01:14   ( -69.95,-123.79) 10/17/2025   08:00:31  ( -69.96,-123.81)    1.19                43
 10/19/2025   22:36:47   ( -70.56,  16.43) 10/19/2025   22:37:57  ( -70.45,  17.50)   41.59                70
 10/19/2025   23:27:24   (  70.05,-175.47) 10/19/2025   23:27:29  (  70.06,-175.41)    2.52                 5
 10/20/2025   00:18:05   ( -69.94,  -7.98) 10/20/2025   00:16:59  ( -69.96,  -7.93)    2.67                66
 10/22/2025   14:53:30   ( -70.14, 132.89) 10/22/2025   14:54:30  ( -70.15, 132.94)    2.38                60
 10/22/2025   15:44:14   (  70.00, -59.60) 10/22/2025   15:43:58  (  69.98, -59.65)    3.31                16
 10/22/2025   16:34:46   ( -69.41, 108.59) 10/22/2025   16:33:36  ( -69.43, 107.24)   52.98                70
 10/25/2025   07:10:20   ( -70.09,-111.25) 10/25/2025   07:10:58  ( -70.09,-111.25)    0.56                38
 10/25/2025   08:01:04   (  69.96,  56.26) 10/25/2025   08:00:25  (  69.97,  56.23)    1.59                39