Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 14.  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)
 07/14/2025   13:38:30   (  71.11, -29.86) 07/14/2025   13:39:36  (  71.01, -27.17)   98.00                66
 07/14/2025   14:28:54   ( -70.08, 139.12) 07/14/2025   14:29:21  ( -70.08, 139.08)    1.68                27
 07/14/2025   15:19:38   (  69.96, -53.39) 07/14/2025   15:18:48  (  69.98, -53.42)    2.95                50
 07/17/2025   05:55:10   (  70.27,  87.27) 07/17/2025   05:56:21  (  70.25,  87.55)   11.01                71
 07/17/2025   06:45:50   ( -70.07,-105.11) 07/17/2025   06:45:52  ( -70.09,-105.04)    2.91                 2
 07/17/2025   07:36:33   (  69.90,  62.46) 07/17/2025   07:35:20  (  69.92,  62.37)    3.81                73
 07/19/2025   22:12:02   (  70.12,-156.72) 07/19/2025   22:12:53  (  70.12,-156.75)    1.01                51
 07/19/2025   23:02:44   ( -70.02,  10.75) 07/19/2025   23:02:23  ( -70.02,  10.74)    0.44                21
 07/19/2025   23:53:11   (  69.00, 179.52) 07/19/2025   23:52:05  (  69.08, 177.11)   95.95                66
 07/22/2025   14:28:57   (  70.07, -40.89) 07/22/2025   14:29:24  (  70.09, -40.91)    2.26                27
 07/22/2025   15:19:39   ( -69.96, 126.59) 07/22/2025   15:18:54  ( -69.99, 126.58)    3.16                45
 07/25/2025   05:55:14   ( -70.44, -93.00) 07/25/2025   05:56:25  ( -70.33, -92.34)   27.72                71
 07/25/2025   06:45:52   (  70.03,  74.94) 07/25/2025   06:45:55  (  70.05,  74.90)    2.12                 3
 07/25/2025   07:36:35   ( -69.97,-117.65) 07/25/2025   07:35:25  ( -69.95,-117.60)    2.91                70
 07/27/2025   22:12:04   ( -70.13,  23.24) 07/27/2025   22:12:59  ( -70.11,  23.23)    2.87                55
 07/27/2025   23:02:47   (  69.99,-169.23) 07/27/2025   23:02:26  (  69.99,-169.30)    2.59                21