Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 23.  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)
 04/24/2025   06:19:27   ( -70.39, -98.96) 04/24/2025   06:20:38  ( -70.33, -98.62)   14.73                71
 04/24/2025   07:10:08   (  70.14,  68.74) 04/24/2025   07:10:07  (  70.12,  68.73)    2.34                 1
 04/24/2025   08:00:50   ( -70.03,-123.77) 04/24/2025   07:59:37  ( -70.00,-123.81)    3.16                73
 04/26/2025   22:36:22   ( -70.22,  17.06) 04/26/2025   22:37:04  ( -70.19,  17.07)    3.35                42
 04/26/2025   23:27:05   (  70.07,-175.40) 04/26/2025   23:26:31  (  70.09,-175.43)    1.74                34
 04/29/2025   14:02:44   (  70.59, -35.09) 04/29/2025   14:03:55  (  70.46, -34.28)   33.79                71
 04/29/2025   14:53:20   ( -70.16, 132.91) 04/29/2025   14:53:28  ( -70.18, 132.95)    2.25                 8
 04/29/2025   15:44:03   (  70.01, -59.56) 04/29/2025   15:42:56  (  70.01, -59.64)    2.99                67
 05/02/2025   06:19:36   (  70.23,  81.24) 05/02/2025   06:20:22  (  70.24,  81.30)    2.61                46
 05/02/2025   07:10:18   ( -70.11,-111.26) 05/02/2025   07:09:52  ( -70.12,-111.23)    2.04                26
 05/04/2025   21:46:01   ( -70.86,  28.67) 05/04/2025   21:47:10  ( -70.75,  30.32)   61.40                69
 05/04/2025   22:36:33   (  70.14,-162.86) 05/04/2025   22:36:46  (  70.15,-162.92)    2.72                13
 05/04/2025   23:27:15   ( -70.02,   4.63) 05/04/2025   23:26:16  ( -70.04,   4.55)    3.48                59
 05/07/2025   14:02:47   ( -70.26, 145.40) 05/07/2025   14:03:40  ( -70.25, 145.48)    3.12                53
 05/07/2025   14:53:30   (  70.11, -47.06) 05/07/2025   14:53:07  (  70.13, -47.04)    3.04                23