Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 11 19.  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)
 11/20/2025   22:36:51   ( -70.49,  16.54) 11/20/2025   22:38:02  ( -70.40,  17.40)   33.69                71
 11/20/2025   23:27:29   (  70.06,-175.47) 11/20/2025   23:27:33  (  70.08,-175.42)    3.04                 4
 11/21/2025   00:18:11   ( -69.97,  -8.02) 11/21/2025   00:17:03  ( -69.97,  -7.94)    2.74                68
 11/23/2025   14:53:44   ( -70.14, 132.84) 11/23/2025   14:54:35  ( -70.15, 132.91)    2.66                51
 11/23/2025   15:44:28   (  70.03, -59.67) 11/23/2025   15:44:02  (  70.04, -59.60)    3.26                26
 11/23/2025   16:34:54   ( -69.08, 109.02) 11/23/2025   16:33:47  ( -69.11, 106.77)   89.06                67
 11/26/2025   06:20:16   (  70.95,  79.97) 11/26/2025   06:21:23  (  70.85,  82.20)   81.92                67
 11/26/2025   07:10:43   ( -70.06,-111.28) 11/26/2025   07:11:05  ( -70.09,-111.29)    3.31                22
 11/26/2025   08:01:27   (  69.95,  56.20) 11/26/2025   08:00:32  (  69.98,  56.20)    3.03                55
 11/28/2025   22:37:01   (  70.15,-162.98) 11/28/2025   22:38:04  (  70.16,-162.94)    2.43                63
 11/28/2025   23:27:43   ( -70.04,   4.51) 11/28/2025   23:27:34  ( -70.06,   4.55)    3.19                 9
 11/29/2025   00:18:19   (  69.51, 172.60) 11/29/2025   00:17:08  (  69.56, 171.50)   43.01                71
 12/01/2025   14:54:00   (  70.08, -47.13) 12/01/2025   14:54:33  (  70.11, -47.13)    2.84                33
 12/01/2025   15:44:43   ( -70.02, 120.29) 12/01/2025   15:44:03  ( -70.01, 120.36)    2.90                40