Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 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)
 06/19/2025   06:20:18   (  70.13,  81.19) 06/19/2025   06:20:59  (  70.11,  81.16)    2.81                41
 06/19/2025   07:10:59   ( -70.02,-111.32) 06/19/2025   07:10:28  ( -70.05,-111.29)    3.37                31
 06/21/2025   21:46:43   ( -70.92,  28.38) 06/21/2025   21:47:51  ( -70.84,  30.47)   76.93                68
 06/21/2025   22:37:14   (  70.10,-162.99) 06/21/2025   22:37:30  (  70.08,-163.01)    1.78                16
 06/21/2025   23:27:55   ( -69.99,   4.50) 06/21/2025   23:27:00  ( -69.97,   4.47)    1.54                55
 06/24/2025   14:03:24   ( -70.16, 145.37) 06/24/2025   14:04:33  ( -70.15, 145.32)    2.36                69
 06/24/2025   14:54:09   (  70.07, -47.18) 06/24/2025   14:54:00  (  70.04, -47.19)    3.34                 9
 06/24/2025   15:44:45   ( -69.69, 120.71) 06/24/2025   15:43:33  ( -69.77, 120.07)   26.35                72
 06/27/2025   06:20:20   ( -70.13, -98.81) 06/27/2025   06:21:03  ( -70.14, -98.80)    1.98                43
 06/27/2025   07:11:05   (  70.04,  68.62) 06/27/2025   07:10:30  (  70.03,  68.68)    2.64                35
 06/29/2025   21:46:46   (  70.81,-151.45) 06/29/2025   21:47:54  (  70.72,-149.71)   64.70                68
 06/29/2025   22:37:16   ( -70.10,  16.99) 06/29/2025   22:37:34  ( -70.07,  16.97)    3.44                18
 06/29/2025   23:28:00   (  69.97,-175.50) 06/29/2025   23:27:01  (  69.95,-175.55)    2.38                59
 07/02/2025   14:03:30   (  70.16, -34.65) 07/02/2025   14:04:33  (  70.18, -34.61)    3.11                63
 07/02/2025   14:54:11   ( -70.02, 132.87) 07/02/2025   14:54:04  ( -70.03, 132.80)    2.86                 7
 07/02/2025   15:44:48   (  69.53, -59.08) 07/02/2025   15:43:37  (  69.58, -60.17)   42.88                71