Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 27.  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)
 06/27/2025   06:20:20   ( -70.12, -98.81) 06/27/2025   06:21:04  ( -70.11, -98.86)    2.76                44
 06/27/2025   07:11:05   (  70.03,  68.64) 06/27/2025   07:10:31  (  70.00,  68.64)    2.96                34
 06/29/2025   21:46:47   (  70.85,-151.51) 06/29/2025   21:47:55  (  70.70,-149.73)   67.25                68
 06/29/2025   22:37:16   ( -70.09,  17.00) 06/29/2025   22:37:34  ( -70.10,  17.02)    0.84                18
 06/29/2025   23:28:01   (  70.01,-175.56) 06/29/2025   23:27:01  (  69.99,-175.49)    2.99                60
 07/02/2025   14:03:30   (  70.14, -34.62) 07/02/2025   14:04:35  (  70.13, -34.69)    2.75                65
 07/02/2025   14:54:12   ( -70.07, 132.81) 07/02/2025   14:54:04  ( -70.08, 132.87)    2.78                 8
 07/02/2025   15:44:49   (  69.56, -59.13) 07/02/2025   15:43:38  (  69.58, -60.17)   40.47                71
 07/05/2025   06:20:25   (  70.12,  81.17) 07/05/2025   06:21:03  (  70.15,  81.22)    3.43                38
 07/05/2025   07:11:06   ( -69.99,-111.31) 07/05/2025   07:10:34  ( -69.99,-111.37)    2.36                32
 07/07/2025   21:46:48   ( -70.80,  28.54) 07/07/2025   21:47:57  ( -70.70,  30.28)   64.61                69
 07/07/2025   22:37:21   (  70.11,-163.04) 07/07/2025   22:37:33  (  70.10,-162.97)    3.13                12
 07/07/2025   23:28:02   ( -69.97,   4.49) 07/07/2025   23:27:04  ( -69.94,   4.45)    3.24                58
 07/10/2025   14:03:32   ( -70.16, 145.34) 07/10/2025   14:04:36  ( -70.15, 145.35)    0.83                64
 07/10/2025   14:54:16   (  70.05, -47.18) 07/10/2025   14:54:03  (  70.03, -47.17)    1.40                13
 07/10/2025   15:44:50   ( -69.53, 120.90) 07/10/2025   15:43:39  ( -69.61, 119.87)   41.19                71