Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 29.  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)
 08/31/2025   14:28:55   ( -70.08, 139.10) 08/31/2025   14:29:41  ( -70.07, 139.04)    2.76                46
 08/31/2025   15:19:39   (  69.99, -53.45) 08/31/2025   15:19:08  (  69.97, -53.45)    2.35                31
 09/03/2025   05:55:21   (  70.91,  86.23) 09/03/2025   05:56:28  (  70.78,  88.35)   78.53                67
 09/03/2025   06:45:49   ( -70.07,-105.10) 09/03/2025   06:46:09  ( -70.06,-105.08)    1.03                20
 09/03/2025   07:36:33   (  69.97,  62.35) 09/03/2025   07:35:36  (  69.96,  62.42)    3.01                57
 09/05/2025   22:11:59   (  70.11,-156.71) 09/05/2025   22:13:06  (  70.14,-156.71)    2.89                67
 09/05/2025   23:02:41   ( -70.01,  10.77) 09/05/2025   23:02:36  ( -70.03,  10.77)    2.64                 5
 09/05/2025   23:53:19   (  69.59, 178.69) 09/05/2025   23:52:08  (  69.65, 177.88)   32.08                71
 09/08/2025   14:28:52   (  70.06, -40.85) 09/08/2025   14:29:34  (  70.08, -40.90)    2.80                42
 09/08/2025   15:19:34   ( -69.95, 126.63) 09/08/2025   15:19:04  ( -69.97, 126.58)    2.77                30
 09/11/2025   05:55:15   ( -70.84, -93.63) 09/11/2025   05:56:23  ( -70.76, -91.65)   73.07                68
 09/11/2025   06:45:46   (  70.07,  74.91) 09/11/2025   06:46:01  (  70.05,  74.94)    2.50                15
 09/11/2025   07:36:28   ( -69.96,-117.61) 09/11/2025   07:35:31  ( -69.94,-117.57)    2.57                57