Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 23.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 10/23/2025   23:01:54   ( -70.09,  10.85) 10/23/2025   23:02:52  ( -70.12,  10.85)    3.57                58
 10/23/2025   23:52:39   (  70.00, 178.30) 10/23/2025   23:52:19  (  70.02, 178.35)    3.04                20
 10/24/2025   00:43:09   ( -69.31, -13.37) 10/24/2025   00:41:59  ( -69.36, -14.93)   61.16                70
 10/26/2025   15:18:44   ( -70.05, 126.70) 10/26/2025   15:19:20  ( -70.07, 126.66)    2.19                36
 10/26/2025   16:09:29   (  69.96, -65.86) 10/26/2025   16:08:47  (  69.96, -65.85)    0.72                42
 10/29/2025   06:45:01   (  70.56,  74.38) 10/29/2025   06:46:11  (  70.47,  75.50)   42.97                70
 10/29/2025   07:35:33   ( -70.02,-117.46) 10/29/2025   07:35:46  ( -70.03,-117.50)    1.53                13
 10/29/2025   08:26:18   (  69.94,  49.97) 10/29/2025   08:25:13  (  69.92,  49.99)    2.69                65
 10/31/2025   23:01:42   (  70.13,-169.15) 10/31/2025   23:02:42  (  70.12,-169.12)    1.67                60
 10/31/2025   23:52:23   ( -70.01,  -1.64) 10/31/2025   23:52:12  ( -70.01,  -1.63)    0.60                11
 11/01/2025   00:42:57   (  69.34, 166.64) 11/01/2025   00:41:48  (  69.40, 165.17)   57.77                69
 11/03/2025   15:18:31   (  70.07, -53.26) 11/03/2025   15:19:08  (  70.06, -53.30)    2.01                37
 11/03/2025   16:09:12   ( -69.94, 114.25) 11/03/2025   16:08:38  ( -69.95, 114.19)    2.55                34