Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 20.  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)
 09/21/2025   22:12:01   (  70.70,-157.60) 09/21/2025   22:13:10  (  70.58,-156.11)   56.41                69
 09/21/2025   23:02:32   ( -70.04,  10.76) 09/21/2025   23:02:48  ( -70.03,  10.72)    1.95                16
 09/21/2025   23:53:16   (  69.91, 178.26) 09/21/2025   23:52:15  (  69.93, 178.23)    1.85                61
 09/24/2025   14:28:43   (  70.10, -40.87) 09/24/2025   14:29:49  (  70.12, -40.90)    2.51                66
 09/24/2025   15:19:25   ( -70.02, 126.56) 09/24/2025   15:19:19  ( -70.01, 126.57)    1.61                 6
 09/24/2025   16:10:03   (  69.58, -65.47) 09/24/2025   16:08:51  (  69.63, -66.31)   33.10                72
 09/27/2025   06:45:36   (  70.09,  74.93) 09/27/2025   06:46:20  (  70.08,  74.91)    1.17                44
 09/27/2025   07:36:17   ( -69.96,-117.56) 09/27/2025   07:35:50  ( -69.97,-117.60)    2.04                27
 09/29/2025   23:02:29   (  70.08,-169.28) 09/29/2025   23:02:50  (  70.07,-169.22)    2.80                21
 09/29/2025   23:53:10   ( -69.95,  -1.77) 09/29/2025   23:52:20  ( -69.97,  -1.73)    2.11                50
 10/02/2025   14:28:39   ( -70.31, 138.83) 10/02/2025   14:29:50  ( -70.26, 139.30)   18.35                71
 10/02/2025   15:19:20   (  70.03, -53.42) 10/02/2025   15:19:19  (  70.04, -53.38)    2.30                 1
 10/02/2025   16:10:01   ( -69.90, 114.09) 10/02/2025   16:08:50  ( -69.89, 114.04)    2.62                71