Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 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)
 06/21/2025   21:46:43   ( -70.96,  28.32) 06/21/2025   21:47:50  ( -70.86,  30.50)   80.31                67
 06/21/2025   22:37:13   (  70.08,-162.97) 06/21/2025   22:37:29  (  70.10,-162.98)    2.61                16
 06/21/2025   23:27:54   ( -69.97,   4.52) 06/21/2025   23:26:59  ( -69.99,   4.50)    2.86                55
 06/24/2025   14:03:25   ( -70.19, 145.32) 06/24/2025   14:04:33  ( -70.17, 145.35)    2.96                68
 06/24/2025   14:54:09   (  70.05, -47.16) 06/24/2025   14:54:00  (  70.06, -47.15)    1.46                 9
 06/24/2025   15:44:46   ( -69.72, 120.65) 06/24/2025   15:43:33  ( -69.79, 120.10)   22.68                73
 06/27/2025   06:20:20   ( -70.11, -98.79) 06/27/2025   06:21:04  ( -70.12, -98.84)    2.08                44
 06/27/2025   07:11:05   (  70.03,  68.65) 06/27/2025   07:10:31  (  70.01,  68.65)    1.80                34
 06/29/2025   21:46:47   (  70.84,-151.51) 06/29/2025   21:47:55  (  70.70,-149.73)   67.12                68
 06/29/2025   22:37:16   ( -70.08,  17.02) 06/29/2025   22:37:34  ( -70.11,  17.03)    2.89                18
 06/29/2025   23:28:01   (  70.00,-175.56) 06/29/2025   23:27:01  (  69.99,-175.49)    2.82                60
 07/02/2025   14:03:29   (  70.14, -34.63) 07/02/2025   14:04:34  (  70.13, -34.70)    3.17                65
 07/02/2025   14:54:11   ( -70.06, 132.82) 07/02/2025   14:54:03  ( -70.08, 132.88)    3.38                 8
 07/02/2025   15:44:47   (  69.51, -59.06) 07/02/2025   15:43:37  (  69.58, -60.18)   44.19                70