Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 30.  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)
 07/02/2025   14:03:30   (  70.16, -34.65) 07/02/2025   14:04:34  (  70.17, -34.63)    1.66                64
 07/02/2025   14:54:11   ( -70.03, 132.86) 07/02/2025   14:54:04  ( -70.06, 132.84)    3.09                 7
 07/02/2025   15:44:48   (  69.52, -59.08) 07/02/2025   15:43:38  (  69.57, -60.19)   43.60                70
 07/05/2025   06:20:26   (  70.14,  81.14) 07/05/2025   06:21:04  (  70.14,  81.20)    2.21                38
 07/05/2025   07:11:07   ( -70.01,-111.34) 07/05/2025   07:10:34  ( -70.03,-111.32)    2.61                33
 07/07/2025   21:46:48   ( -70.82,  28.51) 07/07/2025   21:47:57  ( -70.70,  30.26)   65.73                69
 07/07/2025   22:37:20   (  70.07,-162.99) 07/07/2025   22:37:33  (  70.09,-162.98)    2.34                13
 07/07/2025   23:28:02   ( -69.99,   4.46) 07/07/2025   23:27:03  ( -69.99,   4.51)    1.91                59
 07/10/2025   14:03:32   ( -70.18, 145.31) 07/10/2025   14:04:36  ( -70.15, 145.34)    3.08                64
 07/10/2025   14:54:16   (  70.06, -47.20) 07/10/2025   14:54:03  (  70.04, -47.17)    2.97                13
 07/10/2025   15:44:50   ( -69.55, 120.88) 07/10/2025   15:43:39  ( -69.61, 119.86)   39.97                71
 07/13/2025   06:20:27   ( -70.11, -98.82) 07/13/2025   06:21:06  ( -70.09, -98.86)    3.10                39
 07/13/2025   07:11:11   (  70.00,  68.66) 07/13/2025   07:10:32  (  70.02,  68.69)    2.88                39