Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 20.  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)
 10/22/2025   14:53:29   ( -70.13, 132.89) 10/22/2025   14:54:29  ( -70.14, 132.93)    1.69                60
 10/22/2025   15:44:13   (  69.99, -59.58) 10/22/2025   15:43:57  (  69.98, -59.65)    2.74                16
 10/22/2025   16:34:45   ( -69.40, 108.60) 10/22/2025   16:33:35  ( -69.43, 107.23)   53.74                70
 10/25/2025   07:10:19   ( -70.09,-111.25) 10/25/2025   07:10:56  ( -70.11,-111.21)    2.67                37
 10/25/2025   08:01:03   (  69.95,  56.27) 10/25/2025   08:00:24  (  69.95,  56.20)    2.75                39
 10/27/2025   22:36:37   (  70.65,-163.66) 10/27/2025   22:37:46  (  70.54,-162.33)   50.52                69
 10/27/2025   23:27:09   ( -70.06,   4.59) 10/27/2025   23:27:23  ( -70.04,   4.58)    1.68                14
 10/28/2025   00:17:53   (  69.92, 172.10) 10/28/2025   00:16:50  (  69.93, 172.07)    1.64                63
 10/30/2025   14:53:17   (  70.11, -47.01) 10/30/2025   14:54:19  (  70.10, -47.07)    2.58                62
 10/30/2025   15:43:59   ( -70.04, 120.42) 10/30/2025   15:43:48  ( -70.05, 120.49)    2.89                11
 10/30/2025   16:34:33   (  69.38, -71.30) 10/30/2025   16:33:24  (  69.43, -72.71)   55.48                69
 11/02/2025   07:10:06   (  70.10,  68.79) 11/02/2025   07:10:42  (  70.12,  68.85)    2.76                36
 11/02/2025   08:00:47   ( -69.98,-123.70) 11/02/2025   08:00:13  ( -69.96,-123.74)    2.70                34