Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 1 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)
 01/20/2025   22:37:09   ( -70.19,  17.05) 01/20/2025   22:37:49  ( -70.19,  17.10)    1.76                40
 01/20/2025   23:27:53   (  70.07,-175.46) 01/20/2025   23:27:16  (  70.09,-175.41)    3.02                37
 01/23/2025   14:03:28   (  70.96, -35.71) 01/23/2025   14:04:35  (  70.87, -33.64)   76.02                67
 01/23/2025   14:53:56   ( -70.15, 132.91) 01/23/2025   14:54:16  ( -70.15, 132.93)    0.89                20
 01/23/2025   15:44:40   (  70.03, -59.60) 01/23/2025   15:43:43  (  70.05, -59.58)    2.01                57
 01/26/2025   06:20:01   (  70.25,  81.23) 01/26/2025   06:21:11  (  70.24,  81.31)    3.49                70
 01/26/2025   07:10:42   ( -70.13,-111.26) 01/26/2025   07:10:41  ( -70.13,-111.22)    1.54                 1
 01/26/2025   08:01:23   (  69.85,  56.48) 01/26/2025   08:00:10  (  69.91,  56.12)   15.18                73
 01/28/2025   22:36:47   (  70.19,-162.87) 01/28/2025   22:37:37  (  70.17,-162.90)    2.92                50
 01/28/2025   23:27:28   ( -70.06,   4.64) 01/28/2025   23:27:07  ( -70.06,   4.58)    2.58                21
 01/29/2025   00:17:55   (  69.04, 173.44) 01/29/2025   00:16:49  (  69.11, 170.95)   99.18                66
 01/31/2025   14:53:33   (  70.14, -46.99) 01/31/2025   14:54:01  (  70.16, -47.01)    2.49                28
 01/31/2025   15:44:15   ( -70.07, 120.44) 01/31/2025   15:43:31  ( -70.05, 120.47)    1.91                44