Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 22.  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   ( -70.11, 132.93) 10/22/2025   14:54:30  ( -70.11, 132.89)    1.55                61
 10/22/2025   15:44:14   (  70.01, -59.62) 10/22/2025   15:43:57  (  70.01, -59.61)    0.51                17
 10/22/2025   16:34:45   ( -69.38, 108.64) 10/22/2025   16:33:35  ( -69.45, 107.26)   54.31                70
 10/25/2025   07:10:20   ( -70.11,-111.29) 10/25/2025   07:10:57  ( -70.09,-111.25)    3.30                37
 10/25/2025   08:01:04   (  69.97,  56.23) 10/25/2025   08:00:24  (  69.98,  56.25)    1.36                40
 10/27/2025   22:36:36   (  70.62,-163.61) 10/27/2025   22:37:46  (  70.53,-162.35)   47.70                70
 10/27/2025   23:27:08   ( -70.03,   4.63) 10/27/2025   23:27:23  ( -70.03,   4.57)    2.59                15
 10/28/2025   00:17:53   (  69.94, 172.07) 10/28/2025   00:16:50  (  69.92, 172.06)    2.34                63
 10/30/2025   14:53:17   (  70.12, -47.04) 10/30/2025   14:54:19  (  70.10, -47.07)    2.56                62
 10/30/2025   15:43:58   ( -70.00, 120.46) 10/30/2025   15:43:49  ( -70.00, 120.41)    2.21                 9
 10/30/2025   16:34:33   (  69.39, -71.33) 10/30/2025   16:33:23  (  69.50, -72.63)   52.07                70
 11/02/2025   07:10:06   (  70.06,  68.85) 11/02/2025   07:10:44  (  70.08,  68.80)    2.91                38
 11/02/2025   08:00:48   ( -69.99,-123.72) 11/02/2025   08:00:14  ( -69.98,-123.71)    1.43                34
 11/04/2025   22:36:24   ( -70.81,  16.14) 11/04/2025   22:37:32  ( -70.69,  17.95)   67.70                68
 11/04/2025   23:26:56   (  70.07,-175.36) 11/04/2025   23:27:08  (  70.09,-175.29)    3.25                12
 11/05/2025   00:17:37   ( -69.94,  -7.84) 11/05/2025   00:16:39  ( -69.93,  -7.89)    1.94                58