Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 16.  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)
 07/17/2025   05:55:09   (  70.26,  87.29) 07/17/2025   05:56:21  (  70.21,  87.50)    9.64                72
 07/17/2025   06:45:49   ( -70.06,-105.09) 07/17/2025   06:45:52  ( -70.04,-105.11)    2.16                 3
 07/17/2025   07:36:32   (  69.89,  62.47) 07/17/2025   07:35:19  (  69.94,  62.39)    5.99                73
 07/19/2025   22:12:03   (  70.16,-156.79) 07/19/2025   22:12:53  (  70.14,-156.73)    3.11                50
 07/19/2025   23:02:44   ( -70.00,  10.76) 07/19/2025   23:02:23  ( -70.03,  10.76)    3.07                21
 07/19/2025   23:53:12   (  69.04, 179.46) 07/19/2025   23:52:05  (  69.09, 177.13)   92.65                67
 07/22/2025   14:28:58   (  70.11, -40.95) 07/22/2025   14:29:24  (  70.11, -40.89)    2.37                26
 07/22/2025   15:19:40   ( -70.00, 126.53) 07/22/2025   15:18:54  ( -70.01, 126.60)    2.85                46
 07/25/2025   05:55:14   ( -70.42, -92.98) 07/25/2025   05:56:25  ( -70.35, -92.31)   26.51                71
 07/25/2025   06:45:53   (  70.07,  74.88) 07/25/2025   06:45:55  (  70.07,  74.94)    1.97                 2
 07/25/2025   07:36:35   ( -69.96,-117.63) 07/25/2025   07:35:25  ( -69.97,-117.57)    2.84                70
 07/27/2025   22:12:03   ( -70.12,  23.27) 07/27/2025   22:12:58  ( -70.13,  23.26)    1.89                55
 07/27/2025   23:02:47   (  70.03,-169.29) 07/27/2025   23:02:25  (  70.01,-169.26)    1.93                22